CN104373319B - A kind of crosshead of labyrinth type reciprocating compressor and piston rod connection structure - Google Patents
A kind of crosshead of labyrinth type reciprocating compressor and piston rod connection structure Download PDFInfo
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- CN104373319B CN104373319B CN201410640864.XA CN201410640864A CN104373319B CN 104373319 B CN104373319 B CN 104373319B CN 201410640864 A CN201410640864 A CN 201410640864A CN 104373319 B CN104373319 B CN 104373319B
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Abstract
A kind of crosshead of labyrinth type reciprocating compressor proposed by the present invention and piston rod connection structure, it includes：Crosshead, crosshead block and piston rod, flange, bolt, necking down, bulb and hydrostatic, the left side of the piston rod is equipped with necking down, the left side of necking down is equipped with the bulb with spherical surface, the outside of bulb is equipped with hydrostatic, hydrostatic is equipped with the spherical surface being adapted with bulb, the bulb for being cased with hydrostatic is fixed on crosshead block by the flange by bolt, the structure substantially reduces the stress concentration level of piston rod and crosshead, simultaneously, piston rod possesses self-aligning function, the flexible demand of the micro swing of piston rod is adapted to, reduce the stress level of connecting portion.
Description
Technical field
The present invention relates to a kind of labyrinth type reciprocating compressors, are specifically a kind of crosshead of labyrinth type reciprocating compressor
With piston rod connection structure.
Background technology
Compressor is that a kind of compressed gas improves gas pressure or conveys the machine of gas, the gas compression of low-temp low-pressure
Into the gas of high temperature and pressure, application is extremely wide.In mining industry, Metallurgy Industry, machinery manufacturing industry, civil engineering, petrochemistry work
In industry, refrigeration and gas separation engineering and national defense industry, compressor is one of essential key equipment.In addition, medical treatment,
The demand of the departments such as weaving, food, agricultural, traffic is also growing day by day.Compressor is referred to as " universal machine " because its is widely used.
Compressor be using compressed air as power, compressed air for driving various pneumatic machineries, pneumatic tools, for control instrument and
Its automation equipment, vehicle braking, door and window keying, pharmacy industry, the stirring in brewing industry, latitude sand blast send, is big or middle in air-jet loom
The transmitting of some weapons, the sink-float of submarine, the injection of torpedo in the startup of diesel engine, high pressure blasting coal mining, national defense industry
And driving and raising of a wreck etc..
The effect of cross head assembly is connection piston and link assembly, and the gas force and inertia force of piston are transmitted to connecting rod,
Crosshead bears side-thrust and the motion guide to piston in the cylinder, the piston rod and crosshead of domestic reciprocating compressor
It is directly connected to by hydraulic bolt, since the junction of crosshead and piston rod is that whole unit is most vulnerable to alternate stress destruction
Place, the hydraulic link clamp device that piston rod and crosshead junction are frequently encountered in real work loosens, therefore such as
What design crosshead and piston rod connection structure become the target of labyrinth compressor designer pursuit.
The content of the invention
Goal of the invention：In order to solve the deficiencies in the prior art, a kind of labyrinth type reciprocating compressor provided by the invention
Crosshead and piston rod connection structure, substantially reduce the stress concentration level of piston rod and crosshead, meanwhile, piston rod possesses
Self-aligning function, has adapted to the flexible demand of the micro swing of piston rod, reduces the stress level of connecting portion.
Technical solution：In order to achieve the goal above, a kind of crosshead of labyrinth type reciprocating compressor of the present invention
With piston rod connection structure, it includes：Crosshead, crosshead block and piston rod, flange, bolt, necking down, bulb and static pressure knot
Structure, the left side of the piston rod are equipped with necking down, and the left side of necking down is equipped with the bulb with spherical surface, and the outside of bulb is equipped with static pressure
Structure, hydrostatic are equipped with the spherical surface being adapted with bulb, and the flange will be cased with the bulb of hydrostatic by bolt
It is fixed on crosshead block.
As present invention further optimization, the hydrostatic is by left washer, right washer, oil-through-hole, pin and spring
Composition, left washer are equipped with a pair of of oil-through-hole, and it is tight by a pair of pin realization that right washer is equipped with spring, left washer and right washer
Gu.
As present invention further optimization, between being equipped between the hydrostatic and bulb described in the oil-through-hole
Gap, oil-through-hole are through hole, are equipped with pressure oil in through hole, since pressure oil is to the floating action of land portions, possess piston rod
Self-aligning function, has adapted to the flexible demand of the micro swing of piston rod, reduces the stress level of connecting portion.
As present invention further optimization, the convex of concave ball surfaces and the bulb first half that the left washer is equipped with
Spherical surface is adapted.The curved surface that right washer is equipped with is adapted with bulb and the connecting portion of necking down, which makes to be pressed into contact with face
Uniform force, stress surface increase, substantially reduces the stress concentration level of spherical surface and crosshead.
Advantageous effect：A kind of crosshead of labyrinth type reciprocating compressor provided by the invention and piston rod connection structure,
Compared with prior art, has the following advantages：
（1）：Piston rod afterbody spherical surface and crosshead indent mating spherical surfaces, substantially reduce the stress concentration level of the two；
（2）：The necking section that piston rod is equipped with, for improving the flexibility of piston rod and crosshead connecting portion, significantly
The stress concentration for reducing the position is horizontal；
（3）：By hemispheric right washer and flange plate structure, piston rod is made to accomplish thorough non-threaded in the connecting pin,
The stress concentration because of screw thread process and fastening problems generation will not be generated；
（4）：By the spherical surface in left washer and piston rod afterbody mating spherical surfaces, make the uniform force for being pressed into contact with face, by
Power face increases, and substantially reduces the stress level of piston rod；
（5）：Piston rod and crosshead two coordinate the hydrostatic being equipped between spherical surface, are connected with pressure oil.On the one hand have anti-
Loose function increases the reliability of connection structure；Simultaneously because pressure oil possesses piston rod the floating action of land portions
Self-aligning function has adapted to the flexible demand of the micro swing of piston rod, reduces the stress level of connecting portion；
（6）：The bulb for being cased with hydrostatic is fixed on crosshead block by flange by bolt, facilitates installation and repair
Personnel are operated.
Description of the drawings
Fig. 1 is the partial view of the present invention.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the present invention is furture elucidated.
As shown in Figure 1, a kind of crosshead of labyrinth type reciprocating compressor of the present invention and piston rod connection structure,
It includes：Crosshead 1, crosshead block 2, piston rod 3, flange 4, bolt 5, necking down 6, bulb 7 and hydrostatic 8.
The left side of piston rod 3 is equipped with necking down 6, and the left side of necking down 6 is equipped with the bulb 7 with spherical surface, and the outside of bulb 7 is equipped with
Hydrostatic 8, hydrostatic 8 are equipped with the spherical surface being adapted with bulb 7, and the flange 4 will be cased with static pressure knot by bolt 5
The bulb 7 of structure 8 is fixed on 1 body of crosshead.
Hydrostatic 8 is made of left washer 81, right washer 82, oil-through-hole 83, pin 84 and spring 85, and left washer 81 is equipped with
A pair of of oil-through-hole 83, right washer 82 are equipped with spring 85, left washer 81 and right washer 82 and realize fastening by a pair of pin 84.
Embodiment
Left washer 81 is caught in crosshead block 2, then pressure oil is coated in oil-through-hole 83, then by bulb 7 with
Cushion ring 81 offsets, after right washer 82 is sleeved on the junction of bulb 7 and necking down 6, then by a pair of pin 84 by left washer 81 and the right side
Flange 4, is then stuck in the outer surface of right washer 82, flange 4 is fixed on crosshead by bolt 5 by the connection fastening of washer 82 again
On body 2, which makes piston rod 3 accomplish thorough non-threaded in the connecting pin, will not generate because of screw thread process and fastening problems
The stress concentration of generation.
When piston driving piston rod 3 is taken exercises, piston rod 3 moves right, and bulb 7 squeezes right washer 82 to the right, bulb 7
Right washer 82 is equipped with the junction of necking down 6, piston rod 3 is made to be pressed into contact with the uniform force in face, stress surface increase makes piston rod
Stress level substantially reduce.When piston rod 3 is to left movement, bulb 7 squeezes left washer 81 to the left, and left washer 81 is equipped with recessed
Shape spherical surface is adapted with the convex spherical of 7 first half of bulb, and bulb 7 and the stress concentration level of crosshead block 2 is made to drop significantly
It is low.Moved left and right in piston driving piston rod 3, during so as to which bulb 7 being driven to do side-to-side movement, pressure oil in oil-through-hole 83 with
7 side-to-side movement of bulb, is extruded out of oil-through-hole 83 and the surface coated in bulb 7 and injection are in hydrostatic 8 and bulb 7
Between gap in, This structure increases the reliability of the connection of bulb 7 and hydrostatic 8, simultaneously because pressure oil is to bulb 7
The floating action of land portions makes piston rod 3 possess self-aligning function, and having adapted to the flexible of 3 micro swing of piston rod needs
It asks, reduces the stress level of connecting portion.
The above embodiments merely illustrate the technical concept and features of the present invention, and the purpose is to allow be familiar with the skill of the technical field
Art personnel can understand present disclosure and implement according to this, can not be limited the scope of the invention with this.All bases
The equivalent changes or modifications that spirit of the invention is made, should be covered by the protection scope of the present invention.
Claims (2)
1. a kind of crosshead of labyrinth type reciprocating compressor and piston rod connection structure, it includes：Crosshead (1), crosshead
Body (2) and piston rod (3), it is characterised in that：It is further included：Flange (4), bolt (5), necking down (6), bulb (7) and static pressure
Structure (8), the left side of the piston rod (3) are equipped with necking down (6), and the left side of necking down (6) is equipped with the bulb (7) with spherical surface,
The outside of bulb (7) is equipped with hydrostatic (8), and hydrostatic (8) is equipped with the spherical surface being adapted with bulb (7), the method
The bulb (7) for being cased with hydrostatic (8) is fixed on crosshead (1) body by blue (4) by bolt (5)；
The hydrostatic (8) is made of left washer (81), right washer (82), oil-through-hole (83), pin (84) and spring (85),
Left washer (81) is equipped with a pair of of oil-through-hole (83), and the surface that necking down (6) is contacted with right washer (82) is equipped with spring (85), quiet
Laminated structure (8) is equipped with spring (85), left washer (81) and right pad on the surface contacted with crosshead block (2) and flange (4)
It encloses (82) and fastening is realized by a pair of pin (84)；
Gap is equipped between the hydrostatic (8) and bulb (7)；
The concave ball surfaces that the left washer (81) is equipped with are adapted with the convex spherical of bulb (7) first half, the right side
The curved surface that washer (82) is equipped with is adapted with the connecting portion of bulb (7) and necking down (6)；
Pressure oil is equipped in the oil-through-hole (83)；Pressure oil in oil-through-hole is with bulb side-to-side movement, out of oil-through-hole
It is extruded and is coated in the surface of bulb and is full of in the gap among hydrostatic and bulb, pressure oil is to the spherical surface of bulb
Partial floating action, makes piston rod possess self-aligning function.
2. a kind of crosshead of labyrinth type reciprocating compressor according to claim 1 and piston rod connection structure, special
Sign is：The oil-through-hole (83) is through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410640864.XA CN104373319B (en) | 2014-11-14 | 2014-11-14 | A kind of crosshead of labyrinth type reciprocating compressor and piston rod connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410640864.XA CN104373319B (en) | 2014-11-14 | 2014-11-14 | A kind of crosshead of labyrinth type reciprocating compressor and piston rod connection structure |
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| CN104373319A CN104373319A (en) | 2015-02-25 |
| CN104373319B true CN104373319B (en) | 2018-05-25 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107053619B (en) * | 2017-06-16 | 2023-03-28 | 宁波千普机械制造有限公司 | Flexible connection structure of glue injection head |
| CN112539152A (en) * | 2019-09-21 | 2021-03-23 | 昆明物理研究所 | Self-adaptive compression pair structure for small Stirling refrigerator |
| CN111911397B (en) * | 2020-07-17 | 2021-08-10 | 西安交通大学 | Piston assembly and application thereof |
| CN114542452A (en) * | 2022-03-29 | 2022-05-27 | 兰州兰石石油装备工程股份有限公司 | Connecting rod crosshead structure of multi-cylinder slurry pump |
| CN117685218B (en) * | 2024-01-31 | 2024-04-23 | 四川宏华电气有限责任公司 | Hyperboloid automatic aligning piston rod and processing technology thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100414104C (en) * | 2005-06-01 | 2008-08-27 | 浙江工业大学 | Automatic stop centering mechanism in use for reciprocating pump |
| US8376723B2 (en) * | 2009-01-08 | 2013-02-19 | Weir Spm, Inc. | Connecting rod without wrist pin |
| CN201874804U (en) * | 2010-11-25 | 2011-06-22 | 宝鸡石油机械有限责任公司 | Mud pump piston rod device |
| JP6001993B2 (en) * | 2012-10-15 | 2016-10-05 | 日立アプライアンス株式会社 | Hermetic reciprocating compressor and refrigerator using the same |
| CN203463275U (en) * | 2013-08-23 | 2014-03-05 | 大庆市金拓石油机械制造有限公司 | Reciprocating mechanism for opposed reciprocating pumps |
| CN204327443U (en) * | 2014-11-14 | 2015-05-13 | 固耐重工（苏州）有限公司 | A kind of crosshead of maze type reciprocal compressor and piston rod linkage structure |
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