CN103727196B - Complete-equilibrium-type crankshaft transmission device and compressor thereof - Google Patents
Complete-equilibrium-type crankshaft transmission device and compressor thereof Download PDFInfo
- Publication number
- CN103727196B CN103727196B CN201410018838.3A CN201410018838A CN103727196B CN 103727196 B CN103727196 B CN 103727196B CN 201410018838 A CN201410018838 A CN 201410018838A CN 103727196 B CN103727196 B CN 103727196B
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- Prior art keywords
- connecting rod
- crank
- piston
- pin
- crosshead
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Classifications
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- 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
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/02—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders arranged oppositely relative to main shaft
-
- 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
- F04B39/0027—Pulsation and noise damping means
Abstract
The invention relates to a complete-equilibrium-type crankshaft transmission device which comprises at least one crankshaft connecting rod mechanism set. Each crankshaft connecting rod mechanism set comprises a crankshaft and two pistons which are matched with an air cylinder in a sliding mode and are opposite in direction. The axis of a first piston and the axis of a second piston in each crankshaft connecting rod mechanism set are on the same straight line. The invention further relates to a compressor of the complete-equilibrium-type crankshaft transmission device. According to the arrangement, inertia moment can be removed, so that a high-rotating-speed compressor set is small in size and light in weight, the rotating speed can reach 1800r/min, under high rotating speed, vibration is small, operation is stable, package design can be achieved, and the complete-equilibrium-type crankshaft transmission device and the compressor thereof can be widely used in the field of oil and gas fields.
Description
Technical field
The present invention relates to reciprocating compressor technical field, more particularly to a kind of complete equipilibrium type crank gear and its pressure
Contracting machine.
Background technology
Traditional symmetrical balance-type Reciprocting piston compressor, such as D types, M types, its motion by bent axle, connecting rod,
Crosshead is constituted.Bent axle is divided to shared crank and does not share two kinds of crank.Either share the motion that crank does not still share crank
Mechanism, all using general crankshaft connecting rod system, as shown in figure 1, it includes least one set crankshaft connecting rod system, described in each group
Crankshaft connecting rod system includes crank axle and two pistons coordinated with cylinder slide, and each group of crankshaft connecting rod system is all by one
Crank-pin drives a link assembly, a link assembly to drive reciprocating motion of the pistons by a crosshead part, two
Not point-blank, i.e., there is spacing between the axis of two pistons in the motion of piston.As shown in Fig. 2 working as compressor operation
When, two reciprocating motions of the pistons under the drive of crank axle can produce inertia force F in opposite direction1、F2, simultaneously because spacing
Exist, inertia force can produce moment of inertia M.Compressor designer in the design process, often through control inertia mass, makes every
The inertia mass of one group of crankshaft connecting rod system left and right sides is identical so that the inertia force of each group of crankshaft connecting rod system reach it is flat
Weighing apparatus, but adjust the inertia mass of the crankshaft connecting rod system left and right sides anyway in this case, its inertia force for producing
Square cannot be balanced.If cannot balancing inertia torque, compressor will run in the state of unstable, cause and shake
It is dynamic, bearing bush abrasion can be caused serious when ill-conditioned, corrupted, pipeline leakage of parts etc. are even resulted in, especially with this
The compressor of arrangement is vibrated the growth of index times after rotating speed raising, is become more acutely, so as to further speed up
The corrupted of each part of compressor.Accordingly, it would be desirable to change the arrangement form of crankshaft connecting rod system to solve problem above.
The content of the invention
In order to solve above-mentioned technical problem, the invention reside in studying a kind of complete equipilibrium type high speed compressor, inertia is eliminated
Torque, makes high rotating speed compressor bank run at higher rotational speeds more steady.
To solve above-mentioned technical problem, the present invention provides following technical scheme：
A kind of complete equipilibrium type crank gear, including least one set crankshaft connecting rod system, bent axle described in each group connects
Linkage includes crank axle（1）With two pistons contrary with the direction that cylinder slide coordinates（2）, crankshaft-link rod described in each group
First piston in mechanism（21）Axis（211）With second piston（22）Axis（221）On same straight line.
Alternatively, the crank axle（1）For complete equipilibrium type bent axle, it includes four cranks（12）With three crank-pins
（13）, three crank-pins（13）Two adjacent cranks are clipped in respectively（12）Centre.
Alternatively, the alternate angle positioned at the middle crank-pin and the crank-pin for being located at both sides is 180 degree, positioned at two
The crank-pin equal length of side and be the crank-pin length positioned at both sides positioned at the middle crank-pin length
Twice.
Alternatively, the crank axle（1）Crank（12）Disc is designed to, and in crank（12）Outer rim is provided with galassing
Weighing apparatus hole（14）.
Alternatively, the crankshaft connecting rod system include two piston rods being connected with first piston and second piston respectively and
A series of link assembly（3）, a series of link assembly（3）Including first connecting rod（31）, second connecting rod（32）With
Three connecting rods（33）, wherein first connecting rod（31）Be connected to the crank axle on middle crank-pin, second and third connecting rod
（32、33）It is connected on the crank-pin positioned at both sides of the crank axle.
Alternatively, the first connecting rod（31）For thick connecting rod, described second and third connecting rod（32、33）For thin connecting rod, described
One connecting rod（31）Thickness be second and third connecting rod（32、33）Thickness twice.
Alternatively, the first connecting rod（31）It is arranged on first piston（21）Axis（211）On direction, described second,
Three connecting rods（32、33）Relative to second piston（22）Axis（221）It is symmetrical arranged.
Alternatively, each link assembly（3）Include stub end（301）, little head end（302）With connection stub end and
The body of rod of little head end（303）, each link assembly（3）The stub end（301）It is connected to crank axle（1）On, it is described
Little head end（302）It is connected on one in two piston rods.
Alternatively, the link assembly（3）Stub end（301）Including two first for mutually splicing（3011）With
Two（3012）, described first（3011）And the body of rod（303）It is integrally formed, first（3011）With second（3012）Between
By bolt（3013）It is fixed.
Alternatively, a series of link assembly（3）Little head end pass through crosshead（4）In being connected to two piston rods
On one, wherein, the first connecting rod（31）Little head end pass through the first crosshead（41）It is connected to the piston rod of first piston
On, described second and third connecting rod（32、33）Little head end pass through the second crosshead（42）It is connected on the piston rod of second piston.
Alternatively, the crosshead（4）Including the arc skateboard of two concyclic cylinders（401、402）, one be located at the arc
Slide plate length and the key seat in width centre position（403）, locked instrument for fixing with piston rod（404）And be used for
The bearing pin being hinged with the little head end of connecting rod（405）.
Alternatively, first crosshead（41）Key seat in be provided with a short bearing pin（405）, the first connecting rod
（31）Little head end pass through short bearing pin（405）It is hinged with the first crosshead（41）.
Alternatively, second crosshead（42）Key seat in be provided with a long bearing pin（405）, the bearing pin symmetrically stretches
Go out key seat both sides, described second and third connecting rod（32、33）Little head end respectively by long bearing pin（405）With the second crosshead hinge
Connect.
Alternatively, the overall center of gravity of crankshaft connecting rod system described in each group is located at first piston（21）Axis（211）With
Second piston（22）Axis（221）With the axis of the crank axle（11）Point of intersection.
Alternatively, the crankshaft connecting rod system can be 1 group, 2 groups, 3 groups or multigroup.
Alternatively, when crankshaft connecting rod system is 1 group, 1,2 row crank throw phase angles are respectively 0 °, 0 °；When crankshaft-link rod machine
When structure is 2 groups, 1,2,3,4 row crank throw phase angles are respectively 0 °, 0 °, 270 °, 270 °；When crankshaft connecting rod system be 3 groups when, 1,2,
3rd, 4,5,6 row crank throw phase angles are respectively 0 °, 0 °, 120 °, 120 °, 240 °, 240 °；So-called crank throw phase angle, i.e., when the 1st row are lived
In lid side dead-centre position, other each row pistons reach the angle that respective lid side dead-centre position crank throw is rotated to plug.
A kind of compressor, including driving means and the dress of the complete equipilibrium type transmission of crankshaft as described in front any one technical scheme
Put.
Compared with symmetrical balance-type crank gear and its compressor, complete equipilibrium type crank gear and its compression
The beneficial effect of machine is：
（1）The vibration of compressor earthquake intensity permissible value of conventional symmetric equilibrated type crankshaft connecting rod system is 18mm/s, and the present invention is complete
The vibration of compressor earthquake intensity permissible value of Fully-balanced crank gear is 4.5mm/s；
（2）Little because vibrating using the compressor of complete equipilibrium type crank gear, rotating speed is realized up to 1800r/min
The high rotating speed sledge block compressor design of seriation；
（3）It is little because vibrating using the compressor of complete equipilibrium type crank gear, it is capable of achieving to be installed without immobilizing foundation,
Reduce the construction period of compressor installation and the investment of engineering；
（4）Using the compressor of complete equipilibrium type crank gear, small volume, lightweight, easy to maintenance, maintenance cost
It is low；
（5）Using the compressor of complete equipilibrium type crank gear, small volume, strong adaptability, oil is can be widely applied to
Gas field field, market prospect is considerable.
Description of the drawings
Fig. 1 is the schematic diagram of symmetrical balance-type crank gear；
Fig. 2 is the stress diagram of symmetrical balance-type crank gear；
Fig. 3 is complete equipilibrium type crank gear schematic diagram；
Fig. 4 is the axonometric chart of complete equipilibrium type crank gear；
Fig. 5 is complete equipilibrium type bent axle schematic diagram；
Fig. 6 is the schematic diagram of first connecting rod；
Fig. 7 is the schematic diagram of second connecting rod and third connecting rod；
Fig. 8 is the schematic diagram of the first crosshead；
Fig. 9 is the schematic diagram of the second crosshead；
Figure 10 is the stress diagram of complete equipilibrium type crank gear.
Reference：1- crank axles, 11- axis, 12- cranks, 13- crank-pins, 14- duplicate removal balance pipes；
2- pistons, 21- first pistons, 22- second pistons, 211- axis, 221- axis；
3- link assemblies, 31- first connecting rods, 32- second connecting rods, 33- third connecting rods, 301- stub ends, the little head ends of 302-,
The 303- bodies of rod, 3011- first, 3012- second, 3013- bolts；
4- crossheads, the crossheads of 41- first, the crossheads of 42- second, 401/402- arc skateboards, 403- key seats, 404- locks
Be fixedly mounted with put, 405- bearing pins.
Specific embodiment
To make the technical problem to be solved, technical scheme and advantage clearer, below in conjunction with accompanying drawing and
Specific embodiment is described in detail.
As shown in Figure 3,4, a kind of complete equipilibrium type crank gear provided in an embodiment of the present invention, including least one set
Crankshaft connecting rod system, crankshaft connecting rod system described in each group is contrary with the direction that cylinder slide coordinates including crank axle 1 and two
Piston 2, the axis 211 of the first piston 21 in crankshaft connecting rod system described in each group and the axis 221 of second piston 22 exist
On same straight line.Here, it can be seen that it has significant area with the conventional symmetric equilibrated type crank gear in Fig. 1
Not, there is spacing between the axis of two pistons of conventional symmetric equilibrated type crankshaft connecting rod system, and first piston in the present invention
21 axis 211 and the axis 221 of second piston 22 are on same straight line, that is, so-called complete equipilibrium type.
As shown in figure 5, the crank axle 1 is complete equipilibrium type bent axle, it includes four cranks 12 and three crank-pins 13,
Three crank-pins 13 are clipped in respectively the centre of two adjacent cranks 12.Positioned at the crank-pin of centre and positioned at described in both sides
The alternate angle of crank-pin is 180 degree, positioned at both sides the crank-pin equal length and positioned at the middle crank-pin length about
It is the twice of the crank-pin length positioned at both sides.The crank 12 of the crank axle 1 is designed to disc, and outside crank 12
Edge is provided with duplicate removal balance pipe 14, is adjusted when dynamic balance running is done after polish in order to crank axle.Using above-mentioned into four
Individual crank presss from both sides three crank pin structures, easily facilitates the inertia mass that operator adjust crank axle, is more easy to reach complete equipilibrium.
As shown in Figure 3,4, the crankshaft connecting rod system includes two work being connected with first piston and second piston respectively
Stopper rod and a series of link assembly 3, a series of link assembly 3 includes first connecting rod 31, second connecting rod 32 and the 3rd
Connecting rod 33, wherein first connecting rod 31 be connected to the crank axle on middle crank-pin, 32,33 points of second and third connecting rod
It is not connected on the crank-pin positioned at both sides of the crank axle.The first connecting rod 31 is thick connecting rod, described second and third connecting rod
32nd, 33 is thin connecting rod, and the thickness of the first connecting rod 31 is about the twice of the thickness of second and third connecting rod 32,33.Thin connecting rod and thickness
Connecting rod all adopts die forging, and light weight, intensity are high, rigidity is good.The first connecting rod 31 is arranged on the axis 211 of first piston 21
On direction, described second and third connecting rod 32,33 is symmetrical arranged relative to the axis 221 of second piston 22.Using above-mentioned arrangement side
Formula, easily facilitates the inertia mass that operator adjust link assembly, and its calculating process is simpler, is also more easy to reach put down completely
Weighing apparatus.
Further as shown in Figure 6,7, each link assembly 3 includes that stub end 301, little head end 302 and connection are big
The body of rod 303 of head end and little head end, the stub end 301 of each link assembly 3 is connected on crank axle 1, described little
Head end 302 is connected on one in two piston rods.The stub end 301 of the link assembly 3 include two mutually splicing the
One 3011 and second 3012, described first 3011 and the body of rod 303 are integrally formed, first 3011 and second 3012 it
Between fixed by bolt 3013.Assembling is easy to using the link assembly of splicing construction, is connected firmly, and can only to the part of abrasion
It is replaced, does not result in scrapping for whole link assembly, reduces maintenance cost.
Shown in Fig. 3,4,8,9, as described in the little head end of a series of link assembly 3 two work are connected to by crosshead 4
In stopper rod on one, wherein, the little head end of the first connecting rod 31 is connected to the piston of first piston by the first crosshead 41
On bar, the little head end of second and third connecting rod 32,33 is connected on the piston rod of second piston by the second crosshead 42.Institute
The arc skateboard 401,402, one that crosshead 4 is stated including two concyclic cylinders is located in the middle of the arc skateboard length and width
The key seat 403 of position, the bearing pin being hinged for the locked instrument 404 fixed with piston rod and for the little head end with connecting rod
405.Cross head design using said structure is simple, and uniform force is wear-resistant.
Two kinds according to the different respective designs of link assembly of the crankshaft connecting rod system of complete equipilibrium type high speed compressor is not
Same crosshead, differs primarily in that the position of crosshead bearing pin, and a kind of crosshead is arranged on for thick link design, its bearing pin
Inside crosshead, another kind of crosshead is directed to thin link design, and its bearing pin need to be lengthened and stretch out external, two thin connecting rods are arranged on
Crosshead both sides.Fig. 3,4 visible is specifically combined, a short bearing pin 405, institute are provided with the key seat of first crosshead 41
The little head end for stating first connecting rod 31 is hinged 41 by the short crosshead of bearing pin 405 and first.The key seat of second crosshead 42
A long bearing pin 405 is inside provided with, the bearing pin symmetrically stretches out key seat both sides, the little head end point of second and third connecting rod 32,33
It is not hinged with the second crosshead by long bearing pin 405.
The overall center of gravity of crankshaft connecting rod system described in each group is located at the axis 211 and second piston 22 of first piston 21
The point of intersection of axis 221 and the axis 11 of the crank axle, i.e., inertia force now is 0, and moment of inertia is also 0.In order to ensure
The balance of complete equipilibrium type crankshaft connecting rod system reciprocal inertia force, can be by Three-dimensional Design Software accurate modeling during design, essence
Really calculate the quality of moving component, the symmetrical row reciprocating mass of trim.
This gives the crank gear with 3 groups of crankshaft connecting rod systems, but it is not limited only to 3 groups, is using
During, those skilled in the art can need according to operating mode and the columns of crankshaft connecting rod system is selected.
The present invention also provides a kind of compressor, including driving means and foregoing complete equipilibrium type transmission of crankshaft dress
Put.
Below, the annexation between each part is explained further by assembling process.
During assembling, first removal first connecting rod 31（Thick connecting rod）Upper bolt 3013, by second 3012 of stub end 301 from big
Head end 301 is removed, and first 3011 of stub end 301 is assembled together with crank axle 1 positioned at middle crank-pin, by the
It is stitched together with second 3012 for one 3011, and one is fastened on by second 3012 and first 3011 by bolt 3013
Rise；The piston rod of piston is fixed in the first crosshead 41 by locked instrument 404, by a short pin shaft by first connecting rod
31 little head end 302 is hinged with the first crosshead 41, thus by piston, the first crosshead, first connecting rod and crank axle
It is assembled together.
Second connecting rod 32（Thin connecting rod）With third connecting rod 33（Thin connecting rod）Assembling process and first connecting rod 31 assembling
Journey is slightly different.First the piston rod of another piston is fixed in the second crosshead 42 by locked instrument 404, second is connected
The little head end 302 of bar 32 and third connecting rod 33 is hinged on one by the long pin shaft of its key seat both sides and the second crosshead 42 respectively
Rise；Afterwards, bolt 3013 on removal second connecting rod 32 and third connecting rod 33, by second 3012 of stub end 301 from stub end
301 remove, by first 3011 of the stub end 301 of second connecting rod 32 and third connecting rod 33 with crank axle 1 positioned at both sides
Crank-pin is assembled together, and first 3011 is stitched together with second 3012, and by bolt 3013 by second
3012 tighten together with first 3011, thus fill piston, the second crosshead, second connecting rod and third connecting rod and crank axle
With together.
Referring to Figure 10, it is illustrated that for the stress diagram of the crankshaft connecting rod system of complete equipilibrium type high speed compressor, it is seen that complete
There is no column pitch between the piston of Fully-balanced crankshaft connecting rod system, inertia force point-blank, is put down inertia force is reached
While weighing apparatus, the presence of moment of inertia, i.e. complete equipilibrium are further obviated.Due to the elimination of moment of inertia, the present invention's is complete
Fully-balanced crank gear vibration severity is decreased obviously, and little because vibrating, rotating speed is significantly lifted, up to 1800r/
min。
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of without departing from principle of the present invention, some improvements and modifications can also be made, these improvements and modifications
Should be regarded as protection scope of the present invention.
Claims (2)
1. a kind of complete equipilibrium type crank gear, including least one set crankshaft connecting rod system, crankshaft-link rod described in each group
Mechanism includes crank axle（1）With two pistons contrary with the direction that cylinder slide coordinates（2）, it is characterised in that：Each group of institute
State the first piston in crankshaft connecting rod system（21）Axis（211）With second piston（22）Axis（221）It is straight in same
On line；
The crank axle（1）For complete equipilibrium type bent axle, it includes four cranks（12）With three crank-pins（13）, three cranks
Pin（13）Two adjacent cranks are clipped in respectively（12）Centre；
Alternate angle positioned at the middle crank-pin and the crank-pin for being located at both sides is 180 degree, positioned at the song of both sides
Handle pin equal length and positioned at the twice that the middle crank-pin length is the crank-pin length positioned at both sides；
The crank axle（1）Crank（12）Disc is designed to, and in crank（12）Outer rim is provided with duplicate removal balance pipe（14）；
The crankshaft connecting rod system includes two piston rods being connected with first piston and second piston respectively and a series of company
Bar assembly（3）, a series of link assembly（3）Including first connecting rod（31）, second connecting rod（32）And third connecting rod（33）,
Wherein first connecting rod（31）Be connected to the crank axle on middle crank-pin, second and third connecting rod（32、33）Connect respectively
It is connected on the crank-pin positioned at both sides of the crank axle；
The first connecting rod（31）For thick connecting rod, described second and third connecting rod（32、33）For thin connecting rod, the first connecting rod（31）
Thickness be second and third connecting rod（32、33）Thickness twice；
The first connecting rod（31）It is arranged on first piston（21）Axis（211）On direction, described second and third connecting rod（32、
33）Relative to second piston（22）Axis（221）It is symmetrical arranged；
Each link assembly（3）Include stub end（301）, little head end（302）With connection stub end and the bar of little head end
Body（303）, each link assembly（3）The stub end（301）It is connected to crank axle（1）On, the little head end（302）
It is connected on one in two piston rods；
The link assembly（3）Stub end（301）Including two first for mutually splicing（3011）With second（3012）,
Described first（3011）And the body of rod（303）It is integrally formed, first（3011）With second（3012）Between pass through bolt
（3013）It is fixed；
The first connecting rod（31）Little head end pass through the first crosshead（41）It is connected on the piston rod of first piston, described
2nd, three connecting rod（32、33）Little head end pass through the second crosshead（42）It is connected on the piston rod of second piston；
First crosshead（41）Bearing pin be arranged on the inside of the crosshead, second crosshead（42）Bearing pin lengthen
Stretch out outside the crosshead body.
2. the complete equipilibrium type crank gear described in a kind of compressor, including driving means and aforementioned claim.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410018838.3A CN103727196B (en) | 2014-01-16 | 2014-01-16 | Complete-equilibrium-type crankshaft transmission device and compressor thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410018838.3A CN103727196B (en) | 2014-01-16 | 2014-01-16 | Complete-equilibrium-type crankshaft transmission device and compressor thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN103727196A CN103727196A (en) | 2014-04-16 |
| CN103727196B true CN103727196B (en) | 2017-04-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106224193A (en) * | 2016-08-31 | 2016-12-14 | 成都鸿荣通科技有限公司 | A kind of piston type high pressure water pump |
| CN107218201B (en) * | 2017-05-31 | 2020-04-21 | 江苏昊科汽车空调有限公司 | Floating type reciprocating transmission rod |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2683218B2 (en) * | 1994-05-10 | 1997-11-26 | ロングウェルジャパン株式会社 | Crank device |
| EP1425522A4 (en) * | 2001-08-24 | 2004-07-28 | Kendall Lee Spangler | Crankshaft with continuous main journal and corresponding connecting structure |
| ITMI20032493A1 (en) * | 2003-12-17 | 2005-06-18 | Nuovo Pignone Spa | HANDLING FOR AN ALTERNATIVE COMPRESSOR. |
| CN2764940Y (en) * | 2005-02-04 | 2006-03-15 | 颜尚友 | Crankshaft connecting rod system |
| JP2007120429A (en) * | 2005-10-28 | 2007-05-17 | Toyota Central Res & Dev Lab Inc | Internal combustion engine and compressor |
| CN101865203A (en) * | 2010-01-28 | 2010-10-20 | 无锡开普动力有限公司 | Connecting rod structure for engines |
| CN203743349U (en) * | 2014-01-16 | 2014-07-30 | 沈阳远大压缩机股份有限公司 | Completely-balanced type crankshaft transmission device and compressor thereof |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 110027 Liaoning city in Shenyang Province, the Shenyang economic and Technological Development Zone, Road No. 1 Patentee after: Shenyang Yuanda Compressor Co., Ltd. Address before: 110027 Liaoning city in Shenyang Province, the Shenyang economic and Technological Development Zone, Road No. 1 Patentee before: Shenyang Yuanda Compressor Co., Ltd. |