CN1166870C - Cross head of crank rod type piston compressor - Google Patents
Cross head of crank rod type piston compressor Download PDFInfo
- Publication number
- CN1166870C CN1166870C CNB031146740A CN03114674A CN1166870C CN 1166870 C CN1166870 C CN 1166870C CN B031146740 A CNB031146740 A CN B031146740A CN 03114674 A CN03114674 A CN 03114674A CN 1166870 C CN1166870 C CN 1166870C
- Authority
- CN
- China
- Prior art keywords
- pin
- crosshead
- hole
- cross head
- hole seat
- 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
Images
Abstract
The present invention relates to a cross head for piston compressors in the type of a crank connecting rod. A cross head body with a single pin hole seat and a connecting rod with a fork-shaped small head are hinged up by a short cylindrical cross head pin, the pin hole seat on the cross head body is provided with two through holes coaxial to a slipper cylindrical surface, and a screw thread through hole perpendicular to the axial line of the cross head pin is arranged at the middle part of the cross head pin; a piston rod with outer screw threads at the end part penetrates through a bigger hole in the pin hole seat of the cross head body and is screwed into the screw thread through hole in the cross head pin, and a small section of cylindrical body at the tail of the end is inserted into another hole in the pin hole seat of the cross head body and is positioned with the cross head body; a cross head nut has a cylindrical end which also penetrates through the bigger hole in the pin hole seat of the cross head body and locks the piston rod on the cross head pin, and two friction reducing rings sheathed over the cross head pin separate the cross head body and the small head on the connecting rod. The present invention can be applied to any reciprocating piston compressor on which a cross head needs to be arranged; thus, the structure of cross head members is simpler, and the manufacture and the maintenance are more convenient.
Description
One, technical field
The present invention relates to a kind of crank-linkage type piston compressor crosshead, particularly suitable substitutes the crosshead of other patterns in any crank-linkage type piston compressor that has a crosshead.
Two, background technique
Crosshead is that rotatablely moving of bent axle is converted to the transition member of reciprocating motion of the pistons in the crank-linkage type piston compressor, is one of parts of most critical in the piston compressor, directly affects Economy, reliability and the maintainability of compressor.
The crosshead parts of conventional construction comprise that the box-shaped crosshead body, the microcephaly that have two pin-and-hole seats are sandwiched in connecting rod between the crosshead body two pin-and-hole seats, cylinder that crosshead body and connecting rod small end are hinged together or conical crosshead pin, the screwed piston rod of hexagon cross nut and end.Cross nut is locked at piston rod in the tapped hole of crosshead body front end boss, and connecting rod CONCENTRIC REDUCER width equates that generally crosshead pin is then realized with other means along the location of main-shaft axis direction with screw or elastic scheibe axially locating, connecting rod.Basic structure can develop out that other are more complicated thus, but reliable relatively or be applicable to the structure of different type of machines.The crosshead of this conventional version has following shortcoming:
1, piston force is at first passed to crosshead by piston rod, pass to connecting rod by the crosshead key seat by crosshead pin again, so crosshead need be born the very big piston force of numerical value, this causes by the designed crosshead body of requirement of strength very heavy, especially more outstanding in large-scale compressor, cause very inconvenience of installation, maintenance.
2, huge piston force acts on the crosshead, causes the reliability decrease of crosshead parts.
3, crosshead body complex structure is difficult to make and processing the cost of production height.
4, piston rod connects with the anterior boss of crosshead body, and the boss front portion is the cross nut of fastening piston rod, and this causes these parts bigger in the size of compresser cylinder axial direction, and then influences the boundary dimension of complete machine.
5, wrist pin need carry out axially locating.
For overcoming the shortcoming of conventional construction crosshead, the crosshead that a kind of structure of having arisen at the historic moment is greatly simplified.In this structure, require the width of connecting rod small end to surpass diameter of piston rod, certainly the width that also far surpasses connnecting rod big end, microcephaly's top are milled with a width and surpass the breach that diameter of piston rod, the degree of depth reach microcephaly's axially bored line position approximately, form a connecting rod that is similar to the fork-shaped microcephaly.Cylindrical crosshead pin outer cylinder intermediate portion also is milled with the breach plane that a width and connecting rod small end gap width equate substantially, and its center has a tapped blind hole perpendicular to the shank axis.Crosshead body is no longer for having the box-shaped that pin-and-hole seat and piston rod connect boss, but be simplified to I-shaped single armed structure, it is composed as follows: the concyclic cylinder arc crawler shoe of two position symmetries, one section cylindrical body of in crawler shoe width direction both sides scabbling coaxial with the crawler shoe cylinder, the cylinder width that scabbles both sides is slightly smaller than the width on crosshead pin outer cylinder breach plane, its length be about crawler shoe length half or slightly little, one end of flat cylinder is concordant with the crawler shoe end, it then is connected by two gussets in the crosshead body symmetry plane with two crawler shoes, and flat cylinder center has a through hole that equates with diameter of piston rod with its coaxial diameter.Crosshead pin is inserted in the connecting rod small end hole, breach plane is over against connecting rod small end top breach on it, after the screwed piston rod in end passes I-shaped crosshead body center hole, screw-in is inserted in the crosshead pin tapped blind hole in the connecting rod small end hole, a simple cross nut is pressed on the I shape crosshead body on the crosshead pin breach plane, crosshead body and crosshead pin are then circumferentially located by pin, and the cantilever end of crosshead crawler shoe then contains connecting rod small end.This structure has solved foregoing the the the 1st, the 2nd, the 3rd and the 5th shortcoming of traditional crosshead parts preferably, has improved the 4th shortcoming to a certain extent.But its special structure has also been brought some new problems, embodies as follows:
The rigidity of I, the I-shaped single armed structure of crosshead body is relatively poor, and especially the crosshead crawler shoe is offset to an end of link arm, and this causes its cantilever end especially to be easy to generate deflection deformation, even fractures.
II, the relatively poor cantilever end of crosshead crawler shoe rigidity cause the local specific pressure of crawler shoe pressure-bearing surface to increase after producing deflection deformation, form uneven wearing and tearing.
The lateral force that III, connecting rod transmit is passed to crosshead by piston rod, causes piston rod to be subjected to very big shearing force, is easy to fracture.
IV, piston rod and crosshead body crawler shoe cylinder coaxial rigid are installed, and piston produces flexural stress because of wearing and tearing sinking back piston pole-footing portion.
These defectives of above-mentioned said conventional construction crosshead and new structure crosshead cause its using effect all not ideal enough.
Three, summary of the invention
The purpose of this invention is to provide a kind of simple in structure, stressed evenly, cost is low, the crank-linkage type piston compressor crosshead that component are few.
Solving the technological scheme that technical problem of the present invention adopts is: form the crosshead parts by crosshead body, connecting rod, crosshead pin, cross nut, piston rod, antifriction positioning ring.The characteristics that the present invention gives prominence to are, crosshead body is provided with a pin-and-hole seat, be positioned at the neutral position of crawler shoe length and width direction, have a bigger manhole and a less long-round-shape hole on the described pin-and-hole seat two side, the major axis in described long-round-shape hole is perpendicular to the pin-and-hole axis, two Kong Junyu crawler shoe cylinders are coaxial, and described crosshead body pin-and-hole seat and two arc crawler shoes are coupled together by longitudinal and transverse two gussets; The microcephaly of connecting rod is a fork-shaped, and the pin-and-hole seat of described crosshead body in clamping, is provided with bearing in the microcephaly hole of connecting rod; Crosshead pin is a cylindrical body, the microcephaly of crosshead body and connecting rod is articulated and connected, the intermediate portion of crosshead pin external cylindrical surface is provided with the breach plane that is parallel to the shank axis, the center on described breach plane has a tapped through hole perpendicular to the shank axis, and the breach plane faces the manhole on the crosshead body pin-and-hole seat; The connecting end of piston rod and crosshead body is provided with outside thread, this end end also is provided with the small cylinder coaxial with the body of rod, described male end is passed the manhole on the pin-and-hole seat on the crosshead body and is screwed in the tapped hole of crosshead pin, described rod end small diameter cylinders section is then inserted the long-round-shape through hole on the crosshead body pin-and-hole seat, the cylindrical section of cross nut passes the manhole on the described crosshead body pin-and-hole seat, and piston rod is locked in the crosshead pin tapped through hole; Two are enclosed within on the crosshead pin and the antifriction positioning ring of the crosshead body pin-and-hole seat both sides that are placed in is kept apart described crosshead body and described connecting rod.
Compare with the crosshead parts of existing various structures, the invention has the beneficial effects as follows:
I, piston force are directly passed to crosshead pin by piston rod, and then pass to connecting rod, make crosshead body not bear the huge piston force of numerical value, only bear very little lateral force and more small crosshead body and the reciprocating friction power between the slideway.So the requirement to crosshead body intensity reduces greatly, thereby make crosshead body thoroughly break away from heavy shape and very large size, become very light and handy, be beneficial to very much and install and the field maintenance operation.Compare with traditional structure, it is very simple, easily manufactured that crosshead body becomes, and helps enhancing productivity, reducing manufacture cost.
Bigger in II, the body movement process in the shared size of cylinder-bore axis direction, after installing, cross nut of the present invention still is no more than the front end of crawler shoe, even have than big distance, crosshead crawler shoe end face also can be crossed in crosshead stuffing box end when outer dead point like this, can reduce the size of complete machine in the cylinder-bore axis direction greatly, this is particularly important to oilless compressor.
III, compare with novel I shape single armed crosshead parts, lateral force of the present invention is directly passed to crosshead body by crosshead pin, and needn't stop piston rod and bear shearing force by the piston rod transmission.
IV, crosshead parts of the present invention are after piston sinks because of wearing and tearing, and piston rod can drive the crosshead pin rotation, and can not produce flexural stress at the piston rod root as tradition and novel I shape single armed crosshead.
V, crosshead pin of the present invention are packed into does not need axially locating behind the crosshead body pin-and-hole, simplifies the structure and reduces amount of parts.
The present invention has simple in structure, uses, installation, maintenance is convenient, and lower-cost characteristics can extensively be used in the crank-linkage type piston compressor that any needs are provided with crosshead, substitute the crosshead parts of other patterns.Better economic and social benefit are arranged.
Four, description of drawings
Fig. 1 is a crosshead body perspective view of the present invention;
Fig. 2 forms schematic perspective view for crosshead component parts of the present invention;
Fig. 3 is the three-dimensional assembly relation schematic representation of crosshead parts of the present invention.
Five, embodiment
Below in conjunction with drawings and Examples content of the present invention is described further:
Among Fig. 1～Fig. 3: 1-crosshead body, 2-connecting rod, 3-crosshead pin, 4-piston rod, 5-cross nut, 6-antifriction positioning ring.
With reference to shown in Figure 1, crosshead body 1 proposed by the invention comprises: two concyclic cylinders and with respect to the centrosymmetric arc crawler shoe 11 of described cylindrical axis, a pin-and-hole seat 12 that is positioned at described crawler shoe length and width direction neutral position, longitudinal and transverse two gussets 13 and 14 that described pin-and-hole seat 12 and described arc crawler shoe 11 are coupled together.Described two arc crawler shoes 11 are with respect to the axis symmetry of described pin-and-hole seat 12, have a bigger manhole 15 and a less long-round-shape hole 16 on described pin-and-hole seat 12 two sides, the described crawler shoe cylinder of two Kong Junyu is coaxial, and the major axis in described long-round-shape hole is perpendicular to the pin-and-hole axis.
With reference to Fig. 2, shown in Figure 3, the microcephaly of connecting rod 2 is a fork-shaped, and described crosshead body pin-and-hole seat 12 in clamping, is provided with bearing 21 in the microcephaly hole of described forked link 2.
Crosshead pin 3 is a cylindrical shape, and described crosshead body 1 is hinged with connecting rod 2.Described crosshead pin outer cylinder intermediate portion is milled with the breach plane 31 with self parallel axes, and planar central is provided with the tapped through hole 32 perpendicular to the shank axis.The manhole 15 of breach plane 31 on described crosshead body pin-and-hole seat 12.
The afterbody of the male end 41 of piston rod 4 has a bit of small diameter cylinders body 42 coaxial with the body of rod.The described male end 41 of piston rod is passed the manhole 15 on the crosshead body pin-and-hole seat and is screwed in the crosshead pin tapped through hole 32, adjusts screw-in depth and can obtain suitable dead-center position of piston.In the long-round-shape hole 16 on 42 insertions of the small diameter cylinders body of the end of piston rod 4 crosshead body pin-and-hole seat 12, realize the located lateral of crosshead body, also play the effect of crosshead pin axially locating simultaneously.
The cylindrical section 51 of cross nut 5 passes the manhole 15 on the described crosshead body pin-and-hole seat 12, and the diameter of cylindrical section 51 is less than the diameter of described crosshead body pin-and-hole seat manhole 15, and described cross nut center has tapped through hole 52.Tapped through hole 52 screws with the male end 41 of described piston rod 4, and 51 of described cylindrical sections pass the manhole 15 on the crosshead body pin-and-hole seat 12 and piston rod 4 are locked in the tapped through hole 32 of crosshead pin 3.
The position that contacts with connecting rod 2 microcephalies in crosshead body pin-and-hole seat 12 both sides is provided with two ring anti-attrition positioning rings 6, to isolate the two, also plays along the effect of main-shaft axis direction positioning linkage rod simultaneously.
Can difform grease channel be set according to the purposes difference on the microcephaly of described crosshead body 1, crosshead pin 3 and connecting rod 2, to satisfy the lubricated needs of relative motion surface.
Connecting rod 2 microcephaly's fork-shaped width can hold the length of described crosshead body pin-and-hole seat 12.
Crosshead pin 3 is a cylindrical body, diameter and described crosshead body pin-and-hole equal diameters.
In sum, crosshead body 1 has only a pin-and-hole seat 12, be positioned at the neutral position of crawler shoe 11 length and width direction, two arc crawler shoes 11 are with respect to pin-and-hole seat 12 axis symmetries, have a bigger manhole 15 and a less long-round-shape through hole 16 on described pin-and-hole seat 12 two sides, two Kong Junyu crawler shoes, 11 cylinders are coaxial, and the major axis of described long-round-shape through hole 16 is perpendicular to the pin-and-hole axis, and 11 of described pin-and-hole seat 12 and two arc crawler shoes are coupled together by longitudinal and transverse two gussets.
The effect of inserting the piston rod 4 end small diameter cylinders sections in the long-round-shape through hole 16 on the crosshead body pin-and-hole seat 12 is to realize piston rod 4 and the location of crosshead body 1 at crosshead pin 3 axial directions, while also plays crosshead pin 3 is limited in the crosshead pin-and-hole, prevents the effect that it is deviate from.Long-round-shape hole 16 on the crosshead body 1 cooperates with piston rod 4 terminal cylindrical sections, make crosshead pin 3 can be under the drive of piston rod 4 around self axis rotation, to avoid the flexural stress of piston rod 4 roots.Be arranged between crosshead body 1 pin-and-hole seat, 12 both sides and the connecting rod fork-shaped microcephaly antifriction positioning ring 6 reduce both the friction in, also play along the effect of main-shaft axis direction positioning linkage rod.
Claims (4)
1, a kind of crank-linkage type piston compressor crosshead, by crosshead body (1), connecting rod (2), crosshead pin (3), cross nut (5), piston rod (4), antifriction positioning ring (6) is formed, it is characterized in that crosshead body (1) is provided with a pin-and-hole seat (12), be positioned at the neutral position of crawler shoe length and width direction, have a bigger manhole (15) and a less long-round-shape hole (16) on the two side of described pin-and-hole seat (12), the major axis in described long-round-shape hole (16) is perpendicular to the pin-and-hole axis, two Kong Junyu crawler shoe (11) cylinders are coaxial, and described crosshead body pin-and-hole seat (12) and described two arc crawler shoes (11) are by vertical, horizontal two gussets (13,14) couple together; The microcephaly of connecting rod (2) is a fork-shaped, and the pin-and-hole seat (12) of described crosshead body (1) in clamping; Crosshead pin (3) is a cylindrical body, microcephaly with forked link (2) is articulated and connected with crosshead body (1), be provided with bearing 21 in the microcephaly hole of connecting rod (2), the intermediate portion of crosshead pin (3) external cylindrical surface is provided with the breach plane (31) that is parallel to the shank axis, the center on described breach plane (31) has a tapped through hole perpendicular to the shank axis (32), and breach plane (31) face the manhole (15) on the crosshead body pin-and-hole seat (12); Piston rod (4) is provided with outside thread (41) with the connecting end of crosshead body (1), this end end also is provided with the small cylinder coaxial with the body of rod (42), described male end is passed the manhole (15) on the pin-and-hole seat (12) on the crosshead body (1), and the tapped hole (32) of screw-in crosshead pin (3), described rod end small diameter cylinders section is then inserted the long-round-shape through hole (16) on the crosshead body pin-and-hole seat (12), the cylindrical section (51) of cross nut (5) passes the manhole (15) on the described crosshead body pin-and-hole seat (12), and piston rod (4) is locked in the crosshead pin tapped through hole (32); Two are enclosed within crosshead pin (3) antifriction positioning rings (6) last and crosshead body pin-and-hole seat (12) both sides that are placed in described crosshead body (1) and described connecting rod (2) are kept apart.
2, a kind of crank-linkage type piston compressor crosshead according to claim 1 is characterized in that microcephaly's fork-shaped width of described forked link (2) can hold the length of described crosshead body pin-and-hole seat (12).
3, a kind of crank-linkage type piston compressor crosshead according to claim 1 is characterized in that described antifriction positioning ring (6) is thin toroidal, and thickness can be isolated the microcephaly of described crosshead body pin-and-hole seat (12) and described forked link (2).
4, a kind of crank-linkage type piston compressor crosshead according to claim 1 is characterized in that: described crosshead body (1), connecting rod (2), crosshead pin (3) inside are provided with grease channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031146740A CN1166870C (en) | 2003-05-09 | 2003-05-09 | Cross head of crank rod type piston compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031146740A CN1166870C (en) | 2003-05-09 | 2003-05-09 | Cross head of crank rod type piston compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1445463A CN1445463A (en) | 2003-10-01 |
| CN1166870C true CN1166870C (en) | 2004-09-15 |
Family
ID=27814812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031146740A Expired - Fee Related CN1166870C (en) | 2003-05-09 | 2003-05-09 | Cross head of crank rod type piston compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1166870C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102713294A (en) * | 2009-06-23 | 2012-10-03 | S·P·M·流量控制股份有限公司 | Readily removable pump crosshead |
| WO2013163788A1 (en) * | 2012-04-29 | 2013-11-07 | 四川宏华石油设备有限公司 | Connecting structure for connecting rod and crosshead and assembling method therefor |
| GB2503488A (en) * | 2012-06-28 | 2014-01-01 | Oliver Jukes | A Piston to Shaft Coupling |
| CN104265599B (en) * | 2014-08-29 | 2016-09-07 | 上海上隆压缩机制造有限公司 | A kind of reciprocating raw material air compressor |
| CN105971853B (en) * | 2016-07-14 | 2017-11-17 | 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 |
| CN106089686A (en) * | 2016-07-18 | 2016-11-09 | 衡阳中地装备探矿工程机械有限公司 | A kind of crosshead and piston rod attachment structure and processing method thereof |
| CN106870355B (en) * | 2017-03-14 | 2018-10-09 | 兰州理工大学 | A kind of reciprocating pump cross head assembly |
| CN114135459B (en) * | 2021-12-08 | 2024-01-12 | 西南石油大学 | Ultra-long stroke reciprocating pump with connecting rod pulled |
| US20240052927A1 (en) * | 2022-07-12 | 2024-02-15 | Transcend Energy Group, Llc | Piston assembly and associated components, systems, and method |
-
2003
- 2003-05-09 CN CNB031146740A patent/CN1166870C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1445463A (en) | 2003-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1166870C (en) | Cross head of crank rod type piston compressor | |
| CN1753109A (en) | Connecting method of core rod of synthetic insulator and armour clamp device, and connecting equipment | |
| CN200946616Y (en) | High intensity precise expansion axle pin | |
| CN2903465Y (en) | Plunger slide shoes structure of oil hydraulic pump | |
| CN2871950Y (en) | Double-threaded deflection anti-loosing nut | |
| CN102494001A (en) | Separated-type fastening device | |
| CN101338484B (en) | Chain drive component of warp knitting machine | |
| CN211343638U (en) | Novel clutch master cylinder stud mounting structure | |
| CN86204074U (en) | Locknut | |
| CN202516989U (en) | Pneumatic hammer | |
| CN208787266U (en) | The stretch bending module of bending machine | |
| CN203357089U (en) | Clamp for milling combination faces of connecting rods | |
| CN201284787Y (en) | Connection positioning structure for connecting rod body and connecting rod cover of engine crank link mechanism | |
| CN1270037C (en) | Net frame sphere structure and production method thereof | |
| CN102444659A (en) | Unloading-type anti-vibration nut capable of automatically adjusting position | |
| CN200952982Y (en) | Tensile and torsional gripping head coupling device | |
| CN217452449U (en) | Gear clamping device with high stability | |
| CN216131174U (en) | Force-splitting mechanism | |
| CN218575558U (en) | Radial circumferential drilling tool for piston pin of compressor | |
| CN220742037U (en) | Locking connection structure of band-type brake mode locking | |
| CN220248591U (en) | Splicing bolt made of carbon-carbon composite material | |
| CN220419015U (en) | Hydraulic compression clamp for testing composite material | |
| CN219079762U (en) | Jacquard pull rod adjusting joint not easy to deviate | |
| CN220407848U (en) | Slip table with eliminate tooth clearance structure | |
| CN2351612Y (en) | V-shape slip-spring self-locking screw nut |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040915 Termination date: 20100509 |