Hoisting mechanism 45JLF25D
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Introduction
The products are independently developed and manufactured by our company via absorbing international and domestic advanced technologies.
Natinal Patented products:Patent 1:ZL2009 2 0243653.7
Hoisting Mechanism of Tower crane Patent 2:ZL2010 20226428.5.
Combined-type winding drum used in winch JLF series products adopt the structural style of variable frenquency motor +SNGW reducer+winding drum.S-NGM reducer is employed for the first time in China with the precision of all gears up to over 6 level and features of less noise, compact structure, light weight and convenient maintenance.
Specification
Model:45JLF25FD
Rated single rope tension(kN):25
Magnification:4
Rated power of the motor (kW):45
Working frequency(Hz):6-50-100
Hoisting speed (m/min):2.8-23-46
Hoisting capacity(t):10-10-5
Rope capacity(m):800(6 layers)
Nominal Diameter of wire rope (mm):Φ14
- Q: what can lead tower crane to blank out?
- （1） tower crane has crack; （2）Brake block friction lining wear up to 50% ofRaw material thickness ; （3）Brake wheel surface wear reaches 5mm ~ 2mm （4）Spring has plastic deformation; （5）Lever system, air travelis more than about 10% of its rated trip
- Q: I need to know how Stephen Crane came up with writing the Red Badge of Courage. I need examples of his life experiences that he had and then he put them in the Red Badge of Courage.
- In March 1893, while spending hours lounging in his friend Corwin Knapp Linson's studio while having his portrait painted, Crane became fascinated with old Civil War issues of the Century published between 1884 and 1887. Largely devoted to famous battles and military leaders, the writing was dry and lifeless and Crane, frustrated, said to Linson, I wonder that some of those fellows don't tell how they felt in those scraps. They spout enough of what they did, but they're as emotionless as rocks. Crane returned to these magazines during subsequent visits to Linson's studio and eventually the idea of writing a war novel overtook him. He would later state that he had been unconsciously working the detail of the story out through most of his boyhood and had imagined war stories ever since he was out of knickerbockers. This novel, which he believed would make him famous, would ultimately become The Red Badge of Courage. From the beginning, Crane wished to show what it felt like to be in a war by writing a psychological portrayal of fear. Conceiving his story from the point of view of a young private who is at first filled with boyish dreams of the glory of war and then quickly becomes disillusioned by war's reality, Crane borrowed the private's surname, Fleming, from his sister-in-law's maiden name. Crane would later tell Hamlin Garland that the first words and paragraphs came to him with every word in place, every comma, every period fixed.
- Q: Would David have made a better babysitter than a crane driver?
- none of the crane accidents were fatal, a black lad was slightly injured though
- Q: Cranes nowadays are MASSIVE! but something that has been bugging me for ages is how do they get the massive crane bit at the top down once they have finished constructing the skyscraper/building?
- After this the crew uses a mobile crane to assemble the jib and the machinery section, and places these horizontal members on an approximately 40 foot mast that consists of two mast sections. The mobile crane then adds the counter weights. The mast which is a large triangulated lattice structure typically 10 feet square then rises from this firm foundation. This triangulated structure gives the mast the strength to remain upright. The tower crane rises to its maximum height by using one mast section at a time, the crew uses a top climber that fits between the slewing unit and the top of the mast. This is done by hanging a weight on the jib to balance the counter weight. The crew then detaches the slewing unit from the top of the mast, this is done by using large hydraulic rams in the top climber to push the slewing unit up to 20 feet. The crane is then used to lift another 20 foot mast section into the gap opened by the climbing frame. Once bolted in place the crane gains a height of 20 feet. This process is reversed once the building is finished and its time to dismantle the crane and as stated earlier a smaller crane is used to dismantle the tower crane except the mast which is dismantled by the crane itself
- Q: are they for camera support
- The cranes have the cameras for the panoramic views which are shown throughout the broadcast. There were instances in the past when they also held the camera men.
- Q: What is the difference between a tower crane QTZ31.5 and a QTZ40?
- Lifting moment, arm length, elevation is not the same ah! Specifically, the maximum lifting weight of QTZ315 is 3 tons, the length of the arm is from 38-42 meters, the elevation is 27-28 meters; the maximum QTZ40 is 4 tons;
- Q: inventor of junk yard electromagnetic crane?
- British scientist William Sturgeon invented the electromagnet in 1824. The crane for lifting heavy loads was invented by the Ancient Greeks in the late 6th century BC. Who put the two together idk.
- Q: What does a track type tower crane look like? In that case, use?
- The track type tower crane is like thisUsually use goods or fixed goods yard in shipyard. Hoisting use
- Q: I was half way through this book and had to stop reading it because school got in the way. I'm back to reading it and I got to the part where Katniss made a noose and tied it around a dummy and showed it to the Gamemakers. And she wrote 'Seneca Crane'. I don't remember who that was. If it was even a person, I guess it was. But can you just explain who or what 'Seneca Crane' is and why Katniss would do that? Thanks.
- I think it's one of the gamemakers, but that's just a guess.
- Q: Grade 4 build a working crane Help!?
- Simple crane? Get a spool, maybe one from sewing thread. Attach it to a small base so that it can rotate freely. Put a pencil through the middle tight enough so that when the pencil rotates the spool rotates. Glue a tab on the end of the pencil at a right angle to the pencil so you have a handle. Attach string to the spool and then maybe a ruler or stick to a base lined up with the spool like a crane. Put a couple of eye hooks on the stick and feed the string through so it hangs down at the end of the stick, like a crane cable. At the end of the string put a springy clothspin so that when you pull the string the clothspin opens and closes. Now you can lift and lower the clothspin by rotating the spool with the pencil. Pulling on the string opens the pin to pick up things.
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Hoisting mechanism 45JLF25D
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- -
- Supply Capability:
- -
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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