CN1944961A - Adjusting mechanism for accurately adjusting top pressure and emergency fully closing stator blade - Google Patents
Adjusting mechanism for accurately adjusting top pressure and emergency fully closing stator blade Download PDFInfo
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- CN1944961A CN1944961A CN 200610022029 CN200610022029A CN1944961A CN 1944961 A CN1944961 A CN 1944961A CN 200610022029 CN200610022029 CN 200610022029 CN 200610022029 A CN200610022029 A CN 200610022029A CN 1944961 A CN1944961 A CN 1944961A
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- 230000007246 mechanism Effects 0.000 title claims abstract description 32
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 230000008878 coupling Effects 0.000 claims description 16
- 238000010168 coupling process Methods 0.000 claims description 16
- 238000005859 coupling reaction Methods 0.000 claims description 16
- 238000011084 recovery Methods 0.000 claims description 14
- 230000000295 complement effect Effects 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 description 18
- 230000001360 synchronised effect Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
An adjusting mechanism for accurately adjusting top pressure and emergently fully closing a stationary blade comprises an oil cylinder assembly, a rotating shaft, a gear, a rack, a first-stage large rocker arm, a second-stage large rocker arm, a first-stage large pull rod, a second-stage large pull rod, a first-stage cascade movable ring, a second-stage cascade movable ring, a first-stage small pull rod, a second-stage small pull rod, a first-stage small rocker arm and a second-stage small rocker arm. The rotating shaft is arranged on the supporting rack, the gear is arranged on the rotating shaft, the rack and the gear form a transmission pair, and the oil cylinder assembly is connected with the rack; the first-stage large rocker arm and the second-stage large rocker arm are arranged on the rotating shaft, one end of each large pull rod is hinged with the corresponding large rocker arm, and the other end of each large pull rod is hinged with the corresponding linkage ring; one end of each small pull rod is hinged with the corresponding small rocker arm of the corresponding stage, the other end of each small pull rod is hinged with the corresponding connecting part on the linkage ring of the corresponding stage, and each small rocker arm is connected with the corresponding stationary blade handle of the corresponding stage; each cascade moving ring is supported by each stage of roller component.
Description
Technical field
The invention belongs to the stator blade controlling mechanism that uses on the blast-furnace top gas recovery turbine, the mechanism that particularly a kind of multistage stator blade synchronous drive interlock is regulated.
Background technique
Blast-furnace top gas recovery turbine is the blast-furnace top gas recovery recovery plant of iron and steel enterprise, and its operation prerequisite must guarantee that blast furnace top pressure fluctuates in allowed band, thereby guarantees the normal operation of blast furnace ironmaking.The parameter of blast furnace is because the particularity of iron-smelting process is constantly changing, guarantee the safe operation of turbine main frame work done and complete machine under maximal efficiency, the aperture that need adjust stator blade adapts to the variation of high furnace parameters, in the process of main frame start, also need to open the rotating speed that stator blade improves the main frame main shaft gradually, to reach the working speed that is incorporated into the power networks.Therefore, the adjustment of stator blade aperture is extremely important.
The existing used multistage stator blade controlling mechanism of blast-furnace top gas recovery turbine, its structure is single oil cylinder Lever type quadratic crank mechanism.The controlling mechanism of this kind structure has the following disadvantages: 1, be difficult to realize stator blade adjustment blast furnace top pressure and the automatic adjusting and the control of generating electricity by way of merging two or more grid systems, essential other supporting startup modulating valve; Start modulating valve and not only cost an arm and a leg, can increase the airflow path resistance, influence the utilization ratio of coal gas overbottom pressure, but also supporting hydraulic pressure and control system must be arranged, cause the whole system complexity, accident point increases.2, inertial force is big, can produce huge internal force at the volley and the dead point occur, and the angular range that causes stator blade to open or close is narrower.3, the pin that connects between the lever is more because connection part has certain clearance, these gap affects the precision of control and the speed of servo-system response.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art; a kind of novel accurate adjusting roof pressure and the controlling mechanism of urgent complete shut-down stator blade are provided; this kind controlling mechanism can realize separately that not only stator blade is to the adjusting of blast furnace top pressure and the adjusting of generating electricity by way of merging two or more grid systems; and synchronism is fine at the volley; positive and negative moving direction changes can not produce internal force; when emergency episode; can the fast rotational stator blade; make the leaf grating adjacent blades superimposed; reach and close the stator blade passage, guarantee that the main frame main shaft can reduce rotating speed rapidly when gas flow falls sharply; until shutdown, to guarantee Host Security.
The controlling mechanism of accurate adjusting roof pressure of the present invention and urgent complete shut-down stator blade comprises cylinder component, support bed, rotating shaft, gear, tooth bar, the big rocking arm of one-level, the big rocking arm of secondary, the big pull bar of one-level, the big pull bar of secondary, one-level interlock ring, secondary interlock ring, one-level lower link bar, secondary lower link bar, one-level small rocker, secondary small rocker, one-level roller assembly and secondary roller assembly.The assembling mode of above-mentioned member: rotating shaft is installed on the support bed, and gear is installed in the rotating shaft, and rack and pinion is formed transmission, and cylinder component is connected with tooth bar and transmits power to tooth bar; Big rocking arm of one-level and the big rocking arm of secondary are installed in the rotating shaft and are positioned at the gear both sides, one end and the big rocking arm of one-level of the big pull bar of one-level are hinged, its the other end and one-level interlock ring are hinged, and an end and the big rocking arm of secondary of the big pull bar of secondary are hinged, and its other end and secondary interlock ring are hinged; The quantity of one-level lower link bar and one-level small rocker is identical with the quantity of one-level stator blade, one end of each one-level lower link bar is hinged with corresponding one-level small rocker respectively, to go up corresponding connection part hinged with one-level interlock ring respectively for the other end of each one-level lower link bar, each one-level small rocker respectively with the petiole connection of corresponding one-level stator blade; The quantity of secondary lower link bar and secondary small rocker is identical with the quantity of secondary stator blade, one end of each secondary lower link bar is hinged with corresponding secondary small rocker respectively, to go up corresponding connection part hinged with secondary interlock ring respectively for the other end of each secondary lower link bar, each secondary small rocker respectively with the petiole connection of corresponding secondary stator blade; One-level roller assembly and secondary roller assembly at least respectively are 6 covers, all are fixed on the inner housing that the two-stage stator blade is installed, and the inner ring surface of one-level interlock ring, secondary interlock ring is supported on respectively on the public circumcircle of each self-corresponding roller assembly roller.
In order to adapt to interlock ring and being connected of rocking arm greatly, big pull bar of described one-level and the big pull bar of secondary are the length adjustable structure, comprise screw rod and coupling sleeve, the middle part of screw rod is provided with screw thread and pulls piece, the thread rotary orientation that screw thread is pulled the piece both sides is opposite, coupling sleeve is two, and each coupling sleeve is by constituting with the swivel nut section of the screw thread of screw rod connecting end coupling and with slot segments that the connection part of big rocking arm or interlock ring is complementary, and two coupling sleeves are installed in the two ends of screw rod by the locking nut symmetry.
For the interlock ring can stably be supported on the roller assembly, the inner ring surface that one-level interlock ring and secondary interlock encircle has the groove that the roller thickness with one-level roller assembly and secondary roller assembly is complementary, during assembling, the roller of one-level roller assembly and secondary roller assembly embeds one-level interlock ring and secondary interlock respectively and encircles in the groove on the inner ring surface.
For a blast-furnace top gas recovery turbine, the controlling mechanism of accurate adjusting roof pressure of the present invention and urgent complete shut-down stator blade is provided with two covers, symmetry is installed in the position up and down of blast-furnace top gas recovery turbine frame, the servovalve platform is two covers, be the synchronous fuel feeding of the oil cylinder in the controlling mechanism, thereby make their synchronous drive under the effect of couple.
The working principle of the controlling mechanism of accurate adjusting roof pressure of the present invention and urgent complete shut-down stator blade: the servovalve platform is according to the requirement of high furnace parameters, oil cylinder in the cylinder component is supplied hydraulic oil, piston under the effect of hydraulic oil in the cylinder component promotes tooth bar and moves in the horizontal direction, the motion driven gear of tooth bar rotates, the rotation of gear then makes rotating shaft rotate thereupon, and big rocking arm of the one-level that is installed in the rotating shaft and the big synchronous rocker of secondary are rotated, thereby pass through one-level, the big pull bar of secondary spurs one-level interlock ring and secondary interlock ring synchronously, every cascade rotating ring each lower link bar and each small rocker by respective stages makes the stator blade of respective stages change corresponding angle, with the unlatching that realizes stator blades at different levels or close.
The present invention has following beneficial effect:
1, controlling mechanism of the present invention can be realized stator blade separately to the adjusting of blast furnace top pressure and the adjusting of generating electricity by way of merging two or more grid systems, and compares with existing similar mechanism, has reduced cost, simplifies the structure, and work is reliable more, safety.
2, owing to adopted the rack pinion transmission, thereby the dead point can not appear at the volley.
3, synchronism is good, when positive and negative moving direction changes, can not produce internal force, can adapt to servo-controlled requirement, when emergency episode, can quick and completely close stator blade, guarantees safety.
4, according to the radius of the length of big rocking arms at different levels, interlock rings at different levels and the length of lower link bars at different levels, can adjust the aperture corresponding relation of one-level stator blade and secondary stator blade, be converted into to the energy maximal efficiency of assurance blast furnace gas useful work.
5, big pull bar of one-level and the big pull bar of secondary are the length adjustable structure, be convenient to regulate the spacing between big pull bar and big rocking arm, interlock ring hinged place two bearing pins, it is adhered to specification, thus guarantee symmetry be installed in the blast-furnace top gas recovery turbine frame up and down the two cover controlling mechanisms at position be synchronized with the movement.
6, the compound mode of interlock rings at different levels and roller assemblies at different levels has guaranteed that the interlock ring can stably be supported on the roller assembly.
7, make and install easily, maintenance and maintenance are convenient.
Description of drawings
Fig. 1 is a kind of installation diagram of the controlling mechanism of accurate adjusting roof pressure of the present invention and urgent complete shut-down stator blade, and two cover controlling mechanism symmetries are installed in the position up and down of blast-furnace top gas recovery turbine frame, and this figure has also represented the part-structure of described controlling mechanism;
Fig. 2 is the partial enlarged drawing of Fig. 1;
Fig. 3 is the structure diagram of cylinder component, rack pinion transmission;
Fig. 4 is the tectonic maps of the controlling mechanism of accurate adjusting roof pressure of the present invention and urgent complete shut-down stator blade, and this figure has represented the mounting point and the annexation of each member;
Fig. 5 is the structural drawing of big pull bar of one-level and the big pull bar of secondary;
Fig. 6 is the annexation figure of lower link bar and small rocker and interlock ring.
Among the figure, 1, cylinder component, 2, support bed, 3, the big rocking arm of secondary, 4, rotating shaft, 5, the big pull bar of secondary, 6, secondary interlock ring, 7, the secondary lower link bar, 8, the secondary small rocker, 9, secondary roller assembly, 10, tooth bar, 11, gear, 12, secondary stator blade, 13, the big rocking arm of one-level, 14, the big pull bar of one-level, 15, one-level interlock ring, 16, the one-level lower link bar, 17, the one-level small rocker, 18, one-level roller assembly, 19, one-level stator blade, 20, screw rod, 21, screw thread pulls piece, 22, locking nut, 23, coupling sleeve, 24, bearing pin, 25, joint shaft bearing.
Embodiment
The controlling mechanism of identical accurate adjusting roof pressure of two nested structures and urgent complete shut-down stator blade has been installed in the position up and down of blast-furnace top gas recovery turbine frame symmetry as shown in Figure 1.
The controlling mechanism of described accurate adjusting roof pressure and urgent complete shut-down stator blade, its structure comprises cylinder component 1, support bed 2, rotating shaft 4, gear 11, tooth bar 10, the big rocking arm 13 of one-level, the big rocking arm 3 of secondary, the big pull bar 14 of one-level, the big pull bar 5 of secondary, one-level interlock ring 15, secondary interlock ring 6, one-level lower link bar 16, secondary lower link bar 7, one-level small rocker 17, secondary small rocker 8, one-level roller assembly 18 and secondary roller assembly 9 as shown in Figure 1, Figure 2, Figure 3 and Figure 4.
Rotating shaft 4 is a multidiameter shaft, and its two ends are installed on the support bed 2; Gear 11 is a tooth sector, is connected with rotating shaft 4 keys, is fixed on the middle part of rotating shaft; Tooth bar 10 is formed transmission with gear, and the piston rod in the cylinder component 1 is threaded with tooth bar, to tooth bar transmission power, promotes tooth bar and moves in the horizontal direction; The big rocking arm 13 of one-level and big rocking arm 3 of secondary and rotating shaft 4 keys are connected and are positioned at the both sides of gear 11; Big pull bar 14 of one-level and the big pull bar 5 of secondary are the length adjustable structure, as shown in Figure 5, comprise screw rod 20 and coupling sleeve 23, the middle part of screw rod is provided with screw thread and pulls piece 21, the thread rotary orientation that screw thread is pulled the piece both sides is opposite, coupling sleeve 23 is two, and each coupling sleeve is by constituting with the swivel nut section of the screw thread of screw rod connecting end coupling and with slot segments that the connection part of big rocking arm or interlock ring is complementary, and two coupling sleeves are installed in the two ends of screw rod by locking nut 22 symmetries; The big rocking arm of one end of the big pull bar 14 of one-level and one-level 13 is hinged, its the other end and one-level interlock ring 15 is hinged, and the big rocking arm of an end of the big pull bar 5 of secondary and secondary 3 is hinged, its other end and secondary link encircle 6 hinged, the structure of each hinged place realizes hinged by joint shaft bearing 25 and bearing pin 24 as shown in Figure 5; The quantity of one-level lower link bar 16 and one-level small rocker 17 is identical with the quantity of one-level stator blade 19, the quantity of secondary lower link bar 7 and secondary small rocker 8 is identical with the quantity of secondary stator blade 12, one end of each one-level lower link bar is hinged with corresponding one-level small rocker respectively, the other end of each one-level lower link bar is hinged with the last corresponding connection lug of one-level interlock ring respectively, one end of each secondary lower link bar is hinged with corresponding secondary small rocker respectively, the other end of each secondary lower link bar is hinged with the last corresponding connection lug of secondary interlock ring respectively, connection lug on the interlock rings at different levels evenly distributes along interlock ring outer rim, as Fig. 1, shown in Figure 2, the Placement of each lower link bar and small rocker and interlock ring realizes hinged by joint shaft bearing and bearing pin as shown in Figure 6; Each one-level small rocker connects with the petiole key of corresponding one-level stator blade 19 respectively, and each secondary small rocker connects with the petiole key of corresponding secondary stator blade 12 respectively; One-level roller assembly 18 and secondary roller assembly 9 all mainly are made up of cylindrical roller and bearing, respectively be 8 covers, each bearing that overlaps roller assembly is separately fixed on the inner housing that the two-stage stator blade is installed and evenly distribution on circumference, the inner ring surface of one-level interlock ring 15 and secondary interlock ring 6 has the groove that the cylindrical roller thickness with one-level roller assembly and secondary roller assembly is complementary, during assembling, the roller of one-level roller assembly and secondary roller assembly embeds one-level interlock ring and secondary interlock respectively and encircles in the groove on the inner ring surface.
Claims (7)
1, the controlling mechanism of a kind of accurate adjusting roof pressure and urgent complete shut-down stator blade, it is characterized in that comprising cylinder component (1), support bed (2), rotating shaft (4), gear (11), tooth bar (10), the big rocking arm of one-level (13), the big rocking arm of secondary (3), the big pull bar of one-level (14), the big pull bar of secondary (5), one-level interlock ring (15), secondary interlock ring (6), one-level lower link bar (16), secondary lower link bar (7), one-level small rocker (17), secondary small rocker (8), one-level roller assembly (18), secondary roller assembly (9)
Rotating shaft (4) is installed on the support bed, and gear (11) is installed in the rotating shaft, and tooth bar (10) is formed transmission with gear, and cylinder component (1) is connected with tooth bar and transmits power to tooth bar,
Big rocking arm of one-level (13) and the big rocking arm of secondary (3) are installed in the rotating shaft and are positioned at the gear both sides, one end of the big pull bar of one-level (14) and the big rocking arm of one-level (13) are hinged, its the other end and one-level interlock ring (15) are hinged, one end of the big pull bar of secondary (5) and the big rocking arm of secondary (3) are hinged, its the other end and secondary interlock ring (6) are hinged
One-level lower link bar (16) is identical with the quantity of one-level stator blade with the quantity of one-level small rocker (17), one end of each one-level lower link bar is hinged with corresponding one-level small rocker respectively, the other end of each one-level lower link bar is hinged with the last corresponding connection part of one-level interlock ring respectively, each one-level small rocker connects with the petiole of corresponding one-level stator blade (19) respectively
Secondary lower link bar (7) is identical with the quantity of secondary stator blade with the quantity of secondary small rocker (8), one end of each secondary lower link bar is hinged with corresponding secondary small rocker respectively, the other end of each secondary lower link bar is hinged with the last corresponding connection part of secondary interlock ring respectively, each secondary small rocker connects with the petiole of corresponding secondary stator blade (12) respectively
One-level roller assembly (18) and secondary roller assembly (9) at least respectively are 6 covers, all be fixed on the inner housing that the two-stage stator blade is installed, the inner ring surface of one-level interlock ring (15) is supported on the public circumcircle of one-level roller assembly roller, and the inner ring surface of secondary interlock ring (6) is supported on the public circumcircle of secondary roller assembly roller.
2, the controlling mechanism of accurate adjusting roof pressure according to claim 1 and urgent complete shut-down stator blade, it is characterized in that big pull bar of one-level (14) and the big pull bar of secondary (5) include screw rod (20) and coupling sleeve (23), the middle part of screw rod is provided with screw thread and pulls piece (21), the thread rotary orientation that screw thread is pulled the piece both sides is opposite, coupling sleeve (23) is two, each coupling sleeve is by constituting with the swivel nut section of the screw thread of screw rod connecting end coupling and with slot segments that the connection part of big rocking arm or interlock ring is complementary, and two coupling sleeves are installed in the two ends of screw rod by locking nut (22) symmetry.
3, the controlling mechanism of accurate adjusting roof pressure according to claim 1 and 2 and urgent complete shut-down stator blade, it is characterized in that inner ring surface that the interlock of one-level interlock ring (15) and secondary encircles (6) has the groove that the roller thickness with one-level roller assembly (18) and secondary roller assembly (9) is complementary, during assembling, the roller of one-level roller assembly and secondary roller assembly embeds one-level interlock ring and secondary interlock respectively and encircles in the groove on the inner ring surface.
4, the controlling mechanism of accurate adjusting roof pressure according to claim 1 and 2 and urgent complete shut-down stator blade, the gear (11) that it is characterized in that forming with tooth bar transmission is a tooth sector.
5, the controlling mechanism of accurate adjusting roof pressure according to claim 3 and urgent complete shut-down stator blade, the gear (11) that it is characterized in that forming with tooth bar transmission is a tooth sector.
6, the controlling mechanism of accurate adjusting roof pressure according to claim 1 and 2 and urgent complete shut-down stator blade is characterized in that a blast-furnace top gas recovery turbine is provided with two covers, and two cover controlling mechanism symmetries are installed in the position up and down of blast-furnace top gas recovery turbine frame.
7, the controlling mechanism of accurate adjusting roof pressure according to claim 3 and urgent complete shut-down stator blade is characterized in that a blast-furnace top gas recovery turbine is provided with two covers, and two cover controlling mechanism symmetries are installed in the position up and down of the frame of blast-furnace top gas recovery turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100220295A CN100393985C (en) | 2006-10-13 | 2006-10-13 | Adjusting mechanism for accurately adjusting top pressure and emergency fully closing stator blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100220295A CN100393985C (en) | 2006-10-13 | 2006-10-13 | Adjusting mechanism for accurately adjusting top pressure and emergency fully closing stator blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1944961A true CN1944961A (en) | 2007-04-11 |
| CN100393985C CN100393985C (en) | 2008-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100220295A Active CN100393985C (en) | 2006-10-13 | 2006-10-13 | Adjusting mechanism for accurately adjusting top pressure and emergency fully closing stator blade |
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| Country | Link |
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| CN (1) | CN100393985C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948241A (en) * | 2014-03-27 | 2015-09-30 | 中航商用航空发动机有限责任公司 | Gas compressor and stator regulating mechanism used for gas compressor |
| CN106687665A (en) * | 2014-09-05 | 2017-05-17 | 赛峰飞机发动机公司 | Mechanism for driving members for adjusting the orientation of blades |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH624187A5 (en) * | 1977-09-29 | 1981-07-15 | Bbc Brown Boveri & Cie | |
| DE4030107A1 (en) * | 1990-09-22 | 1992-03-26 | Steag Ag | HYDRAULIC ACTUATOR FOR CONTROL AND CONTROL ARMATURES |
| DE4320937A1 (en) * | 1993-06-24 | 1995-01-05 | Abb Management Ag | Actuator for a control valve |
| JPH08312305A (en) * | 1995-05-19 | 1996-11-26 | Mitsubishi Heavy Ind Ltd | Hydraulic governor for turbine |
| ITTO20010505A1 (en) * | 2001-05-25 | 2002-11-25 | Iveco Motorenforschung Ag | VARIABLE GEOMETRY TURBINE. |
| JP3680012B2 (en) * | 2001-08-14 | 2005-08-10 | 三菱重工業株式会社 | Steam valve drive controller |
| CN200961493Y (en) * | 2006-10-13 | 2007-10-17 | 成都发动机（集团）有限公司 | Adjusting mechanism for accurately adjusting top pressure and emergency fully closing stator blade |
-
2006
- 2006-10-13 CN CNB2006100220295A patent/CN100393985C/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948241A (en) * | 2014-03-27 | 2015-09-30 | 中航商用航空发动机有限责任公司 | Gas compressor and stator regulating mechanism used for gas compressor |
| CN106687665A (en) * | 2014-09-05 | 2017-05-17 | 赛峰飞机发动机公司 | Mechanism for driving members for adjusting the orientation of blades |
| CN106687665B (en) * | 2014-09-05 | 2019-06-14 | 赛峰飞机发动机公司 | Drive the mechanism of the component for adjusting blade orientation |
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| Publication number | Publication date |
|---|---|
| CN100393985C (en) | 2008-06-11 |
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Owner name: CHENFA ENERGY CO., LTD. Free format text: FORMER OWNER: CHENGDU ENGINE (GROUP) CO., LTD. Effective date: 20120322 |
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Effective date of registration: 20120322 Address after: 610000 the town of Xindu Xindu District of Chengdu Shulong Avenue South 521 Building No. 166 layer 1-2 Patentee after: CHENGDU CHENGFA SCIENCE & TECHNOLOGY POWER ENGINEERING CO., LTD. Address before: 77 box 51, box 610067, Chengdu City, Sichuan Province Patentee before: Chengdu Engine (Group) Co., Ltd. |