CN105971853B - The hydraulic connecting structure that crosshead body is connected with piston rod - Google Patents
The hydraulic connecting structure that crosshead body is connected with piston rod Download PDFInfo
- Publication number
- CN105971853B CN105971853B CN201610553460.6A CN201610553460A CN105971853B CN 105971853 B CN105971853 B CN 105971853B CN 201610553460 A CN201610553460 A CN 201610553460A CN 105971853 B CN105971853 B CN 105971853B
- Authority
- CN
- China
- Prior art keywords
- ring
- crosshead
- piston rod
- screwed
- crosshead body
- 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.)
- Expired - Fee Related
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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C5/00—Crossheads; Constructions of connecting-rod heads or piston-rod connections rigid with crossheads
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The hydraulic connecting structure that crosshead body is connected with piston rod belongs to crosshead body and piston rod attachment structure technical field, more particularly to the hydraulic connecting structure that a kind of crosshead body is connected with piston rod.The present invention provides a kind of simple in construction, good connecting effect, safety coefficient the hydraulic connecting structure that high crosshead body is connected with piston rod.The present invention includes crosshead body and piston rod, piston rod one end is placed in crosshead body, the rear end that piston rod is placed in crosshead body inner termination is provided with thrust ring, the piston rod periphery of thrust ring rear end, which is provided with, is screwed into ring, it is screwed into ring outer ring front portion to be connected with crosshead body inner thread, is screwed into ring rear portion and is placed in outside crosshead body, the piston rod periphery for being screwed into ring rear end is provided with pressure body, pressure body front portion outer wall is connected with clamp nut rear threads, and clamp nut front end connects with crosshead body end face.
Description
Technical field
The invention belongs to crosshead body and piston rod attachment structure technical field, more particularly to a kind of crosshead body and piston
The hydraulic connecting structure of bar connection.
Background technology
As shown in figure 4, after piston stop gap is adjusted, if locating ring 107 is bonded with the end face of crosshead 11
Together, and just it is bonded, in the absence of impaction state.Suppress and do not fit together certainly after 150MPa, in
Gap state, stop gap has gap to be after adjusting can be with.Accuracy to ensure adjustment stop gap, the two faces are exhausted
In most cases all in the state for having gap, the state to fit together is rarely found.If locating ring and ten have to be ensured
Prefix fits together, and cannot ensure the accuracy in piston stop gap, and stop gap is overproof≤1mm, it is allowed.
If the short 5mm of piston rod 12, adjust be at after stop gap it is this have the state in gap, as long as be screwed into
Ring 108 screws in more than the button of crosshead body 8, and the problem of screw thread is threaded off just is not present, and hydraulic connecting structure is exactly to pacify after suppressing locking
It is complete reliable.Loosening is generated during compressor operation because of the reciprocating vibrations of crosshead body even if fixing screws 106 also not having
Problematic, screw is locked, and locating ring is also just locked.The activity space of locating ring is exactly the gap with screw,
It is locked after circle rotation 3mm.
Since piston rod has been processed short, 5mm, locating ring can not be bonded with crosshead body, and compressor can run well in the same old way
Use, then the function that locating ring is contemplated in advance is just not present, and locating ring is just worth without existing, the screw-in work(of locating ring
It is able to can be screwed into being transferred on ring.
In actual use, intrinsic sealing ring is not gone up situation about pressing and happened occasionally.In actual use, straight pin
103 installation and removal are all very hard, and what does not play, has it to play many negative effects, add install with
The difficulty of dismounting.It was verified that the use of hydraulic connecting structure is not influenceed after cancelling straight pin.
The thrust ring 110 of existing hydraulic connecting structure is fixed on the piston rod by spring 109, the hydraulic connecting of different tonnages
The spring wire diameter and spring outer diameter all same of structure, simply length is different, and the tensile-elasticity of spring is different, due to original
The reasons in structure of design, installation and removal are all inconvenient, and tonnage is more big more difficult, during installation, first by pressure body, clamp nut,
It is screwed into ring set on the piston rod, then extension spring is sleeved on thrust ring, breaking thrust ring into two with one's hands with hand is sleeved on piston rod
On, hydraulic connecting structure is finally screwed in into crosshead body and adjusts stop gap.The hydraulic connecting structure that more than 40 tons of piston force,
Because thrust ring weight is larger, thrust ring has " opening one's mouth " phenomenon during installation.If allow thrust ring " shutting up ", it is necessary to increase spring drawing
Power, its length is shortened, then installation and removal can be more inconvenient, is also easy to tong.Piston force is 80 tons and more large-tonnage
Hydraulic connecting structure, if allowing thrust ring " shutting up ", thrust ring must be broken into two with one's hands tear open by the strength of a people again plus a spring
Under it is extremely difficult.
Existing hydraulic connecting structural series product in use, pressure body 101 or is screwed into the feelings do not got off of ring dismounting
Condition repeatedly occurs, and annoyings manufacturing enterprise always and does not also solve this problem in more than 20 years.This is to have gone out to ask in design certainly
Topic.The information come from user feedback only occurred recently with regard to our company illustrates the seriousness of problem.Case 1：2015
Shanxi Coking Plant group Methanol Plant 4M50（50）4 row compressors, maintenance when there are 3 row to suppress 150MPa, hydraulic connecting structure is just
It is to dismantle to get off, user is forced to pull down after being destroyed using the method for water weldering cutting, and result is hydraulic structure together with piston
Bar is scrapped together.Case 2：2015 in Kunming nitrogen fertilizer plant 4M40（50）4 row compressors, maintenance when suppress 150MPa, just
It is to have 1 row hydraulic connecting structure not tear open not get off, and is pulled down after being destroyed using the method for water weldering cutting, as a result finds to be screwed into
Ring（Material：42CrMo）Thread off and damage, crosshead body（Material：ZG230-450）Screw thread also gross distortion damage it is strange existing
As " good material " part screw thread fractures, and normal steel casting material parts screw thread gross distortion but does not fracture.
In existing hydraulic connecting structure, the axial dimension of the part such as piston rod, middle body, connect cylinder, cylinder seat and cylinder body must be complete
Portion is qualified, has the overproof 2mm of axial dimension or the axial overproof 2mm of size cumulative of assembling of a part, between piston stop is ensured
On the premise of gap accuracy, locating ring is not just bonded with crosshead.Locating ring is bonded with crosshead, cannot ensure
The accuracy in stop gap, the existing value of locating ring are almost nil.
Existing crosshead body and the thread pitch being fastenedly connected of hydraulic connecting structure are 2mm, and in maintenance, hydraulic pressure connects
The situation that the dismounting of binding structure is not got off happens occasionally, and one of reason is that pitch is too small, and single thread segment product is small, before force side
Three button screw thread stress are maximum, and screw thread generates plastic deformation in the presence of alternate load, and screw buckle is killed.The two of reason are
The material selection steel alloy 42CrMo of hydraulic connecting structure, original design is pursued simply uses high-strength material, without knowing metal
The tensile strength of material is higher, under larger alternate load effect, the lower characteristic of its fatigue resistance.
Existing crosshead pin is free to rotate in the operating condition, has hair during the thing of burning crosshead pin in actual use
Raw, if crosshead pin fixation is prevented into it, from rotating, the phenomenon for burning crosshead pin solves at once, and has obtained repeatedly testing
Card.Crosshead pin fixed structure has clear and definite regulation on design manual, Germany than the large carrying capacity of crosshead pin rotational structure
's《Machine Design》In have calculation formula also it is manifestly intended that come.
Existing crosshead pin original is designed as structure closed at both ends, and the hole of center portion is to lead to lubricating oil.
Existing crosshead body oil-through-hole is eccentric structure, and in drilling, drill bit is easily to side sideslip, also easily by drill bit
Damage, it is necessary to a false crosshead pin frock is installed, drill bit sideslip during preventing drilling, such way both bothered, but must when
Often more renew frock.
Original structure is in processing, once the keyway dimension overproof of the dimension overproof of key or crawler shoe on crosshead body, is repaired
To size as defined in pattern, it is all pretty troublesome which part, which is repaired,.
The content of the invention
The present invention is aiming above mentioned problem, there is provided the high crosshead of a kind of simple in construction, good connecting effect, safety coefficient
The hydraulic connecting structure that body is connected with piston rod.
To achieve the above object, the present invention adopts the following technical scheme that, the present invention includes crosshead body and piston rod, piston
Bar one end is placed in crosshead body, and the rear end that piston rod is placed in crosshead body inner termination is provided with thrust ring, thrust ring rear end
Piston rod periphery, which is provided with, is screwed into ring, is screwed into ring outer ring front portion and is connected with crosshead body inner thread, is screwed into ring rear portion and is placed in ten
Prefix is external, and the piston rod periphery for being screwed into ring rear end is provided with pressure body, pressure body front portion outer wall and clamp nut rear threads
Connection, clamp nut front end connects with crosshead body end face；Its structural feature pressure body rear end is provided with vertical pressurizing port, vertically
Pressurizing port bottom is connected with horizontal pressurizing port one end, and the horizontal pressurizing port other end is connected with chamber seal groove, and chamber seal groove front portion is set
Sealing ring is equipped with, sealing ring front end connects with being screwed into ring end face.
The crosshead pin perforation boss edge of the crosshead body is extended to crosshead body periphery reinforcement；Strengthen
Muscle is two cross reinforcings, and center line crosses crosshead pin perforated base；Laterally two reinforcements are symmetricly set on crosshead pin
The perforation left and right sides, side cross reinforcing extend to crosshead body openend, and opposite side cross reinforcing extends to crosshead
The inner of body and piston rod connector；The crosshead body upper and lower side sets the crawler shoe groove of restricted crawler shoe right position, crawler shoe
It is arranged in crawler shoe groove groove, crawler shoe is connected by pin and bolt with crosshead body；The crosshead pin is hollow-core construction；Crosshead
Pin both ends of the surface have been bolted baffle plate.
As a kind of preferred scheme, sealing ring of the present invention is horizontal y-type seal ring.
As another preferred scheme, ring, pressure body, the clamp nut of the present invention of being screwed into uses 45 carbon steel bodies, laterally
Diameter >=6mm of pressurizing port.
As another preferred scheme, clamp nut rear end of the present invention outer wall and clamp nut rear end and pressure body phase
Angle index line is provided with the pressure body outer wall at the place of connecing.
As another preferred scheme, the ring rear portion outer wall of the present invention that is screwed into is cased with locating ring, locating ring front end and ten
Prefix body end face is in contact, and locating ring is circumferentially arranged multiple vertical dowel holes, dowel hole and the horizontal stroke of locating ring one end
Increase successively to distance；It is screwed into ring rear portion outer wall and dowel hole is circumferentially provided with multiple vertical screwed holes, screwed hole
Lateral separation with being screwed into ring one end increases successively.
As another preferred scheme, dowel hole of the present invention and the lateral separation of locating ring one end increase successively
1mm, screwed hole increase 1mm successively with being screwed into the lateral separation of ring one end, and the number of screwed hole is four.
As another preferred scheme, locating ring of the present invention uses NYLON610 locating ring.
It is boss structure as another preferred scheme, in the middle part of thrust ring front end face of the present invention, boss structure rear end
It is circumferentially arranged to have annular slot, jump ring is installed in annular slot.
Secondly, the screw thread of the present invention for being screwed into ring is M90 × 4, and pressure body screw thread is M110 × 4.
In addition, 2 degree of one ruling of angle index line of the present invention, in units of 10 degree.
Beneficial effect of the present invention.
Present invention eliminates 4 parts, change the structure of 5 parts, not only mount and dismount and save trouble, do not go up pressure
Problem is satisfactory to be solved, and suppress 150MPa has no problem completely, and radial dimension also reduces, simple in construction and maintain
Function originally.
The crosshead pin perforation boss edge of crosshead body of the present invention is extended to crosshead body periphery reinforcement, passes through
Experiment proves that the safety coefficient of crosshead significantly increases.
Crosshead pin of the present invention uses hollow-core construction, and bending strength substantially increases, and with steel pipe blanking, machine tonnage is bigger,
Weight saving is more notable, not only saves material, also shortens machining period.
The present invention cancels crawler shoe keyway, and crawler shoe is integrally become to bonding and is embedded on crosshead body, so that mating part ten
The structure of prefix body is further simple, and processing is also simpler, it is easier to ensures crudy and precision.Structure after improvement
Whether crawler shoe or crosshead body, design of part is simple, is easily guaranteed that crudy and precision, once dimension overproof, right
Which part is repaired all simply saves trouble very much.
The present invention, which fixes crosshead pin with standard key, prevents it to meet design requirement, crosshead pin is fixed from rotating
Afterwards, bearing capacity is bigger, and connecting rob bushing is burnt during work or is resolved the problem of burning crosshead pin.
Brief description of the drawings
The present invention will be further described with reference to the accompanying drawings and detailed description.The scope of the present invention not only limits to
In the statement of herein below.
Fig. 1 is schematic structural view of the invention.
Fig. 2 is clip spring structure schematic diagram of the present invention.
Fig. 3 is Fig. 2 top view.
Fig. 4 is existing hydraulic connecting structural representation.
Fig. 5 is crosshead body structural representation of the present invention.
Fig. 6 is that crosshead body of the present invention erects sectional view.
Fig. 7 is existing cross head design schematic diagram.
Fig. 8 is Fig. 7 A-A sectional views.
Fig. 9 locating ring structure schematic diagrames of the present invention.
In figure, 1 be thrust ring, 2 be jump ring, 3 for be screwed into ring, 4 be locating ring, 5 be alignment pin, 6 be clamp nut, 7 be Y
Type sealing ring, 8 be pressure body, 9 be angle index line, 10 be horizontal pressurizing port, 11 be crosshead body, 12 be piston rod, 13 be
Bolt, 14 be pin, 15 be pad, 16 be crawler shoe, 17 be crosshead pin, 18 be baffle plate, 19 be bolt, 20 be plug screw, 21 be sliding
Carry out groove, 22 be crosshead body and piston rod connector, 23 be oil-through-hole, 24 be oil guide groove, 25 be vertical oil guiding hole.
Embodiment
As illustrated, the present invention includes crosshead body and piston rod, piston rod one end is placed in crosshead body, and piston rod is put
The rear end of crosshead body inner termination is provided with thrust ring, the piston rod periphery of thrust ring rear end, which is provided with, is screwed into ring, is screwed into ring
Outer ring front portion is connected with crosshead body inner thread, is screwed into ring rear portion and is placed in outside crosshead body, is screwed into outside the piston rod of ring rear end
Enclose and be provided with pressure body, pressure body front portion outer wall is connected with clamp nut rear threads, clamp nut front end and crosshead body end
Face connects；Pressure body rear end is provided with vertical pressurizing port, and vertical pressurizing port bottom is connected with horizontal pressurizing port one end, laterally suppressed
The hole other end is connected with chamber seal groove, and chamber seal groove front portion is provided with sealing ring, and sealing ring front end connects with being screwed into ring end face.
The development of the present invention is set forth below.
As shown in figure 4, the featheredge of pressure piston 104 be dismounting when spanner, in practice it has proved that, when eliminate straight pin it
Afterwards, two screwed holes are processed in pressure piston side to be dismantled, particularly adds the fit clearance of pressure piston and pressure body
Larger, dismounting pressure piston is very convenient, and at this moment the featheredge of pressure piston is unnecessary, should cancel.Cancel featheredge it
Afterwards, not only pressure piston is simple in construction, also make it that the structure of spouse's pressure body is simple.By carefully analyzing, since sealing
Circle has changed to flat bottom surface contact structures, then the bottom surface of sealing ring directly contacts with being screwed into ring, and its sealing effectiveness is the same
, cancel after improving pressure piston should no problem, the result of practice, cancel pressure piston, influence to use, then it is overall
Structure further simplifies.
The sealing ring is horizontal y-type seal ring.The present invention makes the structure of sealing ring 102 into Y types by V-type, by more
Secondary practical proof, sealing effectiveness is especially good when suppressing 150MPa, does not go up the problem of pressing and is solved.
Ring, pressure body, the clamp nut of being screwed into uses 45 carbon steel bodies, diameter >=6mm of horizontal pressurizing port.Normalized condition
The allowable pressure 380MPa of 45 carbon steels, it is entirely capable of meeting to require.Existing pressure body suppresses oilhole diameter 4mm, processing difficulties, easily
Damage drill bit, make into >=6mm just it is reasonable, practice effect is satisfactory.
The notch angles of the y-type seal ring are 40 degree, and notch wall thickness is 4mm, and the thickness of y-type seal ring is 13mm.
Clamp nut rear end outer wall and clamp nut rear end on the pressure body outer wall of pressure body joint with being provided with
Angle index line.
The ring rear portion outer wall that is screwed into is cased with locating ring, and locating ring front end is in contact with crosshead body end face.
Locating ring is circumferentially arranged multiple vertical dowel holes, and the lateral separation of dowel hole and locating ring one end is successively
Increase.
It is screwed into ring rear portion outer wall and dowel hole is circumferentially provided with multiple vertical screwed holes, screwed hole is with being screwed into ring
The lateral separation of one end increases successively.
The lateral separation of the dowel hole and locating ring one end increases 1mm, screwed hole and the horizontal stroke for being screwed into ring one end successively
Increase 1mm successively to distance, the number of screwed hole is four.
The locating ring structure of Curve guide impeller must is fulfilled for following condition.
First, locating ring should be designed to the function of axial movement, only cancel screw thread, be designed to that smooth endoporus is matched somebody with somebody
Close, and the distance of 8~12 positioning holes and side should increase 1mm successively, could meet the function of axial movement.
Second, the positioning spiro pit for being screwed into ring makes 4 or 6 into by 3, and increases 1mm successively with the distance of side, this
Sample is engaged with locating ring, increases the adaptability of the accumulated error in part processing error or installation.
3rd, locating ring is eliminated in impulsive force caused by reciprocating motion i.e. reciprocal inertia force, intrinsic positioning spiral shell
It is not all right certainly to have very big gap between nail and positioning hole, and the design of alignment pin and positioning hole must be that gap coordinates,
Gap will ensure≤0.15mm.
4th, although the gap very little of shop bolt and positioning hole, if being 35 carbon steels by former Design Orientation ring material, weigh
Amount seems very heavy, and tens kilograms of impulsive force can be produced during work, does not meet design requirement at all, it is necessary to by the weight of locating ring
Lower, could so reduce impulsive force caused by reciprocating motion.Only make the material of locating ring into plastics（Nylon
610）, impulsive force caused by reciprocating motion could be lowered.According to the maximum reciprocal inertia force Imax=mr ω of compressor2
（1+ λ）/ 9.8 formula calculates, and the maximum reciprocal inertia force for the plastics locating ring that piston force is 10 tons is 2.5kg, and piston force is
The maximum reciprocal inertia force of 80 tons of plastics locating ring is 5kg.Although the maximum reciprocal inertia force of locating ring is little during work, can
It is to exist and give alignment pin one impulsive force all the time, large-scale compressor rotating speed is in 300~500r/min, more than rushing for 5 times/second
Frequency is hit, plastics retaining ring failure will soon be made.Want to play function and the effect that locating ring should possess, do not understand certainly locating ring
This problem of generation impulsive force, the then all effort above paid will fall short of success for lack of final effort.
5th, in order to dissolve 3~5kg impulsive force of the locating ring to alignment pin, after having adjusted stop gap when mounted,
Smearing adhesive makes locating ring be cemented with being screwed into ring, is positioned such that ring would not produce small reciprocal play and carry out im-pact location
Pin, it could only in this way dissolve locating ring when moving back and forth to impulsive force caused by alignment pin.
Only meet the requirement of above-mentioned five aspects, the function of locating ring could be realized to greatest extent.This structure is set
Meter causes the adaptability of hydraulic connecting structure greatly to enhance, that is, is not afraid of piston rod, middle body, connect cylinder, cylinder seat and cylinder body etc. zero
Part length dimension is overproof, and the function that locating ring was contemplated originally could be realized.It can be that enterprise brings very big warp that this structure, which is improved,
Ji benefit.
The locating ring uses NYLON610 locating ring.
It is boss structure in the middle part of the thrust ring front end face, boss structure rear end is circumferentially arranged annular slot, annular
Jump ring is installed in neck.The problem of present invention is for thrust ring assembly and disassembly inconvenience and " opening one's mouth " phenomenon, extension spring is changed to
Jump ring, and the spring ring groove position of fixed thrust ring is moved on into edge.By practice test, installation and removal are not only changed
Mode, thrust ring is inserted into attachment structure during installation, one it is hand steered live thrust ring, another hand holds jump ring alignment annular groove one and pushes away
Just install, both hands embrace on thrust ring one and push away jump ring during dismounting, and jump ring just has moved back, time saving and energy saving, gives peace installation and dismantling
Unload to bring and greatly facilitate.Also allow thrust ring thorough " shutting up " simultaneously, the hydraulic connecting structure jump ring steel wire of different tonnages is straight
Footpath is different, has reached the purpose of an arrow three carving.Pass through the front and rear contrast of this improvement, the bigger hydraulic connecting knot of piston force tonnage
Structure effect is more obvious.
The screw thread for being screwed into ring is M90 × 4, and pressure body screw thread is M110 × 4.Ring screw thread is screwed into by M90 × 2 to be made into
M90 × 4, pressure body screw thread make M110 × 4 into by M115 × 2, and screw thread answers prioritizing selection First Series, does not select the 3rd system as far as possible
Row, and have the series of screw thread selection the 3rd of half in intrinsic series of products, do not have to the 3rd serial screw thread after Curve guide impeller
Size.
Found by the analysis to each details of hydraulic connecting constitutional detail, it is screwed to be screwed into ring, pressure body and tight
Gu these three parts of nut 105, its material is 42CrMo steel alloy, and screw thread is that the processing of car system rather than rolling are processed, part
Material selection is improper, causes the dismounting of hydraulic connecting structure and does not get off.
Intensity is very high after 42CrMo steel alloys are quenched, and the strength of materials of part is higher, bears antifatigue during alternate load
Intensity is lower, also lower than common tempering carbon steel, and this is put into practice proves repeatedly,《The mechanics of materials》With《Engineering fracture mechanics》
Textbook described in very clearly, just into final conclusion before 50 years.
There is considerable designer from the imagination, it is believed that part material is better than carbon steel from steel alloy, is actually
Metal material is not had a thorough understanding and recognized, it is impossible to discrimination reason therein.Part is screwed inherently individual scarce
Mouthful, it is exactly individual crackle.Notch sensitivity is big, just there is stress concentration, and steel alloy is bigger than the carbon steel factor of stress concentration, wants to do
Method reduces the factor of stress concentration in design and is only rational approach.Since it is screwed into ring and pressure body not in hydraulic connecting structure
Elastic rod structure can be designed to, is especially subject to select 42CrMo steel alloys during larger alternate load not as selection quality carbon steel
Rationally.When part is only designed to elastic rod structure, 42CrMo steel alloys are selected to be only reasonably.Reduce the reasonable of stress concentration
Approach is, by reducing the hardness of material, can improve ridge stressing conditions, the load situation of being evenly distributed is made moderate progress, carry
The bearing capacity and fatigue strength of high screw thread, the material of carbon steel 35 or 45 is selected to be only reasonably.
On March 1st, 1978, the standard 2.3.7 on high-pressure gas pipelines that Japanese The High Pressure Gas Safety Inst. of Japan formulates（3）
Middle regulation：Widely used chrome-molybdenum steel SCM manufacture high pressure flange bolt is prohibitted the use of over as bolt material.The SCM of Japan
The material trademark of the corresponding China of material is 15CrMo, 20CrMo, 30CrMo, 35CrMo, 42CrMo steel alloy, and this is worth us to think
Examine and use for reference.
Threaded part bears larger alternate load, should try to reduce the factor of stress concentration of screw thread in design,
This is only rational direction and approach, that is, the radius of corner for taking increase thread root is effective approach, the circle of thread root
Angular radius is 0.125P, and P is pitch.
The pitch of screw thread is the radius of corner of 2mm roots：0.125 × 2=0.25mm.
The pitch of screw thread is the radius of corner of 3mm roots：0.125 × 3=0.375mm.
The pitch of screw thread is the radius of corner of 4mm roots：0.125 × 4=0.50mm.
The contrast more than is as can be seen that pitch increases, and the radius of corner of thread root substantially increases, and the factor of stress concentration subtracts
Small, the bearing capacity of screw thread significantly improves.
If the pitch of screw thread increases to 3mm or 4mm by 2mm, the bearing capacity of screw thread significantly improves, from different pitch
The size of bearing capacity, it is as follows to calculate contrast from the point of view of single thread segment product contrast：
The single thread segment that pitch is 2mm is accumulated：2X2COS30 ° of ÷ 2=1.732mm2。
The single thread segment that pitch is 3mm is accumulated：3X3COS30 ° of ÷ 2=3.897mm2。
The single thread segment that pitch is 4mm is accumulated：4X4COS30 ° of ÷ 2=6.928mm2。
Found by the contrast accumulated to single thread segment：The sectional area that pitch is 3mm is the sectional area that pitch is 2mm
2.25 times, the sectional area that pitch is 4mm is 4 times of the sectional area that pitch is 2mm.
It follows that conclusion：The bearing capacity for the single screw thread that pitch is 3mm is the big by 1.25 of 2mm than pitch
Again, the bearing capacity for the single screw thread that pitch is 4mm is the big 3 times of 2mm than pitch.
An also strong evidence can prove that the pitch of increase screw thread is correct, and piston rod connects the pitch of piston end
For 4mm or 6mm, the case that nut dismounting does not get off never occurred.
In summary, it is thorough by the way that the material of connector part is changed into carbon steel, and the pitch of increasing screw thread by steel alloy
Bottom solves the problems, such as that the dismounting of hydraulic connecting structure is not got off.
Described 2 degree of one ruling of angle index line, in units of 10 degree.Beaten on pressure body and clamp nut part with laser
Upper angle graduation mark, 2 degree of one ruling, writes numerical value in units of 10 degree, can thus measure the elongation of piston rod, and this is
The function not having in original structure.
The occupation mode of angle index line.
1. hydraulic connecting structure after piston rod assembling with screwing in crosshead body.
2. after the stop gap for adjusting piston and cylinder block, with iron rod or hook spanner rotational fastener nut, make its with
Crosshead body is bonded, and the angle index line number value of clamp nut and the horizontal level of pressure body is kept a record.
3. by oil pump and being screwed into after ring connects, suppress to 150MPa（Curve guide impeller≤120MPa）, rotational fastener spiral shell
Mother is bonded with crosshead, and record rotates the angle index line number value of the clamp nut horizontal level after finishing.
4. the oil pressure of oil pump is laid down, the oil pipe being connected with pressure body is pulled down.
5. the angular values rotated by clamp nut, the actual elongation of piston rod is calculated, to verify that piston rod is stretched
The deviation of the accuracy of the theoretical calculation data of long amount, record piston rod elongation numerical quantity and correct value.
Adaptability after the installation of this structure greatly enhances, that is, is not afraid of piston rod, middle body, connect cylinder, cylinder seat and cylinder body
Length dimension Deng part is overproof, above-mentioned a certain part length dimension overproof value ± 10mm or the axial size cumulative of assembling it is overproof ±
10mm, still it can be used, without changing hydraulic pressure attachment structure size.And a certain part length dimension overproof of original structure >=± 2mm, just
Hydraulic pressure attachment structure size must be changed, otherwise locating ring can not be bonded with crosshead body and turn into ornaments at all, or size
Overproof part is very likely scrapped, and this improvement can be that enterprise brings very big economic benefit.
The crosshead pin perforation boss edge of crosshead body of the present invention is extended to crosshead body periphery reinforcement B；
Reinforcement is two cross reinforcings, and center line crosses crosshead pin perforated base；Laterally two reinforcements are symmetricly set on cross
The head pin perforation left and right sides, side cross reinforcing extend to crosshead body openend, and opposite side cross reinforcing extends to ten
The inner of prefix body and piston rod connector；The crosshead body upper and lower side sets the crawler shoe groove of restricted crawler shoe right position,
Crawler shoe is arranged in crawler shoe groove groove, and crawler shoe is connected by pin and bolt with crosshead body；The crosshead pin is hollow-core construction；Ten
Prefix pin both ends of the surface have been bolted baffle plate.
As shown in figure 5, it can reduce wall thickness dimension, weight saving is obvious by suitably lengthening A-A section sizes.
The crosshead body uses spheroidal graphite cast-iron QT450-10 crosshead bodies.Isothermal hardening ADI Technologies for Heating Processing can be used,
Tensile strength doubles, and fatigue strength also nearly doubles.Based on this point, crosshead body wall thickness can also reduce, this be from
Mitigate the weight of part in terms of Technology for Heating Processing.
Original design cross incidence is integrated connection（At C）, on the whole, the became uneven of casting is even, and casting is in mistake
In thickness position easily produce stomata, shrinkage porosite the defects of, this is unreasonable part of the former design structure in casting technique.Pass through
Optimization design, in line with intensity equal design concept everywhere, redundance at this is subtracted so that wall thickness tends to phase to casting everywhere
Deng so not only alleviating the weight of part, the structure of casting is also reasonable, and crosshead body tonnage is bigger, and weight saving is brighter
Aobvious, this is the mitigation weight in terms of design structure is changed.Half of subtracted gross weight or so is accounted at this.
By can mitigate more than 1/3 in the weight of above Curve guide impeller, crosshead body product line, effect is extremely bright
It is aobvious.Crosshead part is reciprocating member, mitigates the weight of crosshead part（It is to mitigate piston element weight at other one）
The effect for reducing reciprocal inertia force is got instant result, is that Reciprocting piston compressor improves rotating speed in the future, reduces complete machine body
Long-pending all set condition.
The crosshead body and the pitch of piston rod connector outside screw are 3mm or 4mm.Pitch increase makes thread root
Intensity increase, by the way that thread pitch is increased（Less than 16 tons of pitch 3mm, more than 20 tons of pitch 4mm）, hydraulic pressure connects during maintenance
The dismounting of binding structure is not got off（That is thread biting locking）The problem of be solved.
The internal diameter of the crosshead pin and ratio >=0.6 of external diameter；Bending strength is remarkably reinforced.
The oil-through-hole of the crosshead body is arranged in the middle part of crawler shoe；Oil-through-hole is vertical oil-through-hole, and crosshead pin is crossed at center
Perforation transverse center；Crawler shoe both sides are provided with oil guide groove, and oil guide groove upper end is connected with oil-through-hole, and oil guide groove lower end is slided with running through
Shoe, crosshead body, the vertical oil guiding hole of crosshead pin are connected.Oil-through-hole is perpendicularly oriented to the center of crosshead pin-and-hole, bored
Any frock is not needed during hole to prevent drill bit sideslip, casting structure is also symmetrical, simplifies, rational in infrastructure.
Former crosshead body connecting end surface is that counterbore or flake cheat structure, because it is overall be structure heavy at one end, the effect of counterbore
It is to prevent end face from being contacted with ground in lifting after processing and produce abrasion, the lifting rope when actually lifting is using suspender belt
（Without steel wire rope）, part will not be produced during lifting and turns over a big head-down problem, a counterbore at this moment just seems unnecessary, also made
Structure adds complexity.By the discussion repeatedly of the technical staff with special processing crosshead body, counterbore is can not find really also
There is any other purposes, the structure after improvement eliminates counter bore structure.
It is understood that above with respect to the specific descriptions of the present invention, it is merely to illustrate the present invention and is not limited to this
Technical scheme described by inventive embodiments, it will be understood by those within the art that, still the present invention can be carried out
Modification or equivalent substitution, to reach identical technique effect；As long as meet use needs, all protection scope of the present invention it
It is interior.
Claims (8)
1. the hydraulic connecting structure that crosshead body is connected with piston rod, including crosshead body and piston rod, piston rod one end are placed in
In crosshead body, the rear end of the termination that piston rod is placed in crosshead body is provided with thrust ring, outside the piston rod of thrust ring rear end
Enclose to be provided with and be screwed into ring, be screwed into ring outer ring front portion and be connected with crosshead body inner thread, be screwed into ring rear portion and be placed in outside crosshead body,
The piston rod periphery for being screwed into ring rear end is provided with pressure body, and pressure body front portion outer wall is connected with clamp nut rear threads, fastening
Nut front end connects with crosshead body end face；It is characterized in that pressure body rear end is provided with vertical pressurizing port, under vertical pressurizing port
Portion is connected with horizontal pressurizing port one end, and the horizontal pressurizing port other end is connected with chamber seal groove, and chamber seal groove front portion is provided with sealing
Circle, sealing ring front end connects with being screwed into ring end face；
The crosshead pin perforation boss edge of the crosshead body is extended to crosshead body periphery reinforcement；Reinforcement is
The reinforcement of two transverse directions, center line cross crosshead pin perforated base；Laterally two reinforcements are symmetricly set on crosshead pin and worn
At left and right sides of hole, side cross reinforcing extends to crosshead body openend, and opposite side cross reinforcing extends to crosshead body
With the inner of piston rod connector；The crosshead body upper and lower side sets the crawler shoe groove of restricted crawler shoe right position, and crawler shoe is set
Put in crawler shoe groove, crawler shoe is connected by pin and bolt with crosshead body；The crosshead pin is hollow-core construction；Crosshead pin two
End face has been bolted baffle plate；
The sealing ring is horizontal y-type seal ring；
The ring rear portion outer wall that is screwed into is cased with locating ring, and locating ring front end is in contact with crosshead body end face, and locating ring is circumferentially
Multiple vertical dowel holes are provided with, dowel hole and the lateral separation of locating ring one end increase successively；It is screwed into ring rear portion outer wall
Dowel hole is circumferentially provided with multiple vertical screwed holes, screwed hole increases successively with being screwed into the lateral separation of ring one end
Add.
2. the hydraulic connecting structure that crosshead body is connected with piston rod according to claim 1, it is characterised in that described to be screwed into
Ring, pressure body, clamp nut use 45 carbon steel bodies, diameter >=6mm of horizontal pressurizing port.
3. the hydraulic connecting structure that crosshead body is connected with piston rod according to claim 1, it is characterised in that the fastening
Nut back end outer wall and clamp nut rear end on the pressure body outer wall of pressure body joint with being provided with angle index line.
4. the hydraulic connecting structure that crosshead body is connected with piston rod according to claim 1, it is characterised in that the positioning
Pin-and-hole and the lateral separation of locating ring one end increase 1mm successively, and screwed hole increases successively with being screwed into the lateral separation of ring one end
1mm, the number of screwed hole is four.
5. the hydraulic connecting structure that crosshead body is connected with piston rod according to claim 1, it is characterised in that the positioning
Ring uses NYLON610 locating ring.
6. the hydraulic connecting structure that crosshead body is connected with piston rod according to claim 1, it is characterised in that the thrust
It is boss structure in the middle part of ring front end face, boss structure rear end is circumferentially arranged annular slot, and jump ring is provided with annular slot.
7. the hydraulic connecting structure that crosshead body is connected with piston rod according to claim 1, it is characterised in that described to be screwed into
The screw thread of ring is M90 × 4, and pressure body screw thread is M110 × 4.
8. the hydraulic connecting structure that crosshead body is connected with piston rod according to claim 3, it is characterised in that the angle
2 degree of one ruling of graduation mark, in units of 10 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610553460.6A CN105971853B (en) | 2016-07-14 | 2016-07-14 | The hydraulic connecting structure that crosshead body is connected with piston rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610553460.6A CN105971853B (en) | 2016-07-14 | 2016-07-14 | The hydraulic connecting structure that crosshead body is connected with piston rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105971853A CN105971853A (en) | 2016-09-28 |
| CN105971853B true CN105971853B (en) | 2017-11-17 |
Family
ID=56952836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610553460.6A Expired - Fee Related CN105971853B (en) | 2016-07-14 | 2016-07-14 | The hydraulic connecting structure that crosshead body is connected with piston rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105971853B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1445463A (en) * | 2003-05-09 | 2003-10-01 | 西安交通大学 | Cross head of crank rod type piston compressor |
| CN2674183Y (en) * | 2003-12-24 | 2005-01-26 | 沈阳气体压缩机股份有限公司 | Crosshead, hydraulic conjunction and fastening means and piston rod elastic rod structure |
| CN2758526Y (en) * | 2003-12-24 | 2006-02-15 | 沈阳气体压缩机股份有限公司 | Crosshead hydraulic jointing fastener |
| JP4379094B2 (en) * | 2003-11-28 | 2009-12-09 | 株式会社日立プラントテクノロジー | Reciprocating compressor |
| CN204003345U (en) * | 2014-07-24 | 2014-12-10 | 万源市中川机械销售有限公司 | For the hold down gag of piston compressor crosshead pin |
| CN104806483A (en) * | 2014-01-24 | 2015-07-29 | 上海华林工业气体有限公司 | Hydraulic nut demounted nondestructively and demounting method of hydraulic nut |
| CN204664130U (en) * | 2015-03-20 | 2015-09-23 | 程柱英 | The linkage structure of crosshead, crosshead and shank and slidercrank mechanism thereof |
| CN205370900U (en) * | 2015-12-29 | 2016-07-06 | 安徽晋煤中能化工股份有限公司 | Asymmetric oil circuit cross head pin of JB6M50 compressor |
| CN205858607U (en) * | 2016-07-14 | 2017-01-04 | 沈阳佳信压缩机制造有限公司 | The hydraulic connecting structure that crosshead body is connected with piston rod |
-
2016
- 2016-07-14 CN CN201610553460.6A patent/CN105971853B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1445463A (en) * | 2003-05-09 | 2003-10-01 | 西安交通大学 | Cross head of crank rod type piston compressor |
| JP4379094B2 (en) * | 2003-11-28 | 2009-12-09 | 株式会社日立プラントテクノロジー | Reciprocating compressor |
| CN2674183Y (en) * | 2003-12-24 | 2005-01-26 | 沈阳气体压缩机股份有限公司 | Crosshead, hydraulic conjunction and fastening means and piston rod elastic rod structure |
| CN2758526Y (en) * | 2003-12-24 | 2006-02-15 | 沈阳气体压缩机股份有限公司 | Crosshead hydraulic jointing fastener |
| CN104806483A (en) * | 2014-01-24 | 2015-07-29 | 上海华林工业气体有限公司 | Hydraulic nut demounted nondestructively and demounting method of hydraulic nut |
| CN204003345U (en) * | 2014-07-24 | 2014-12-10 | 万源市中川机械销售有限公司 | For the hold down gag of piston compressor crosshead pin |
| CN204664130U (en) * | 2015-03-20 | 2015-09-23 | 程柱英 | The linkage structure of crosshead, crosshead and shank and slidercrank mechanism thereof |
| CN205370900U (en) * | 2015-12-29 | 2016-07-06 | 安徽晋煤中能化工股份有限公司 | Asymmetric oil circuit cross head pin of JB6M50 compressor |
| CN205858607U (en) * | 2016-07-14 | 2017-01-04 | 沈阳佳信压缩机制造有限公司 | The hydraulic connecting structure that crosshead body is connected with piston rod |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105971853A (en) | 2016-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20140322050A1 (en) | Pump System | |
| CN205858607U (en) | The hydraulic connecting structure that crosshead body is connected with piston rod | |
| CN105971853B (en) | The hydraulic connecting structure that crosshead body is connected with piston rod | |
| CN205842028U (en) | Hydraulic connecting structure | |
| CN206054227U (en) | The flange connection that crosshead body is connected with piston rod | |
| CN2747025Y (en) | Apparatus for disassembling axle pin | |
| CN206643852U (en) | A kind of deep groove ball bearing takes out instrument | |
| CN106194660B (en) | The flange connection that crosshead body is connected with piston rod | |
| CN108591241A (en) | V-type diesel bent axle | |
| CN204784136U (en) | Connection rod | |
| CN101176979A (en) | Clipper for feedback lever milling flat face of electro-hydraulic servo valve part baffle | |
| CN206054517U (en) | Novel flange attachment structure | |
| CN208578825U (en) | A kind of shaft coupling hydraulic bolt | |
| CN208416920U (en) | Three screw pump fixator | |
| CN204113635U (en) | The two material cylinder sleeve of a kind of slurry pump anticreep cylinder | |
| CN201193487Y (en) | Wear resistant type pump rod joint | |
| CN206377172U (en) | Pump elastic column axis coupling | |
| CN206484467U (en) | A kind of bridge-type spanner | |
| CA2305481A1 (en) | Self-fastened ball mill liner | |
| CN220566411U (en) | Pin shaft structure for control connecting rod of clay gun machine | |
| CN205663583U (en) | Emulsion pump station | |
| CN2657250Y (en) | Cable protector | |
| CN208438285U (en) | Reciprocating compressor crosshead dismantling device | |
| CN214465408U (en) | Through hole pin structure for electronic jacquard machine | |
| CN219528955U (en) | General type pours into first gooseneck guider into |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171117 Termination date: 20210714 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |