trolley mechanism 120JXL

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Introduction

The JXL trolley mechanism is a self-designed new product based on the advanced foreign technology, and got the national utility mode patents.

The JXL trolley mechanism constitutes torque motor, half built-in planetary reduction gear wound roll, rack, and other components, which has advantages of smooth shift from the brake, transmission efficency, low noise, compact structure, and brakeing safe, reliable, accruate positioning, pleasing in appearance, and other characteristics.

After changing variable-frequency speed regulation motor and electronic system, the institutions can be changed to JXF trolley mechanism, which has the advantages of zero velocity brake, starting speed more stable and is more suitable to large tower crane and the trolley running on a demanding place.

Performance parameters

Model:120JXL

Motor Power(KW):

Rated stalling torque of torque motor(N.m):120

Rated single rope tension (N):5400

Single-rope linear velocity(m/min):0-63

Rope capacity(m):73

Wire rope diameter(mm):8

Relevant parameter of the suitable tower crane

--Max lifting load(t):12

--Max crest(m):75

trolley mechanism 120JXL

Q: How would the environment, habitat, or ecosystem be affected if whooping cranes were extinct?: the whopoping crane is not a part of the food chain. Nothing would happen. 100 birds is not a pencil point in the data. We spend millions on this bird and it's lose would NOT be noticed by anyone. I'll bet not one person on this form has even seen one, can tell us what is food chain function is. A link to a post or wikpedia won't cut it either, I want the exact species that is in the chain both up and down and what the exact effect would be. Since no one can give a specific chapter and versus on the specifics and talk about genaerizations, IMHO, I'm correct. NOW If the question was about the loss of all Raptors in the world, there would be an upset. The Whooping crane in it's self is so small it's impact of lose is zero. I call BS on the poster that says she saw them in FL. NOT ONE SINGLE WEB site lists FL as it's home range. You could at least have gone to Wiki and gotten your facts right and answered my AP question, but you instead tried a red herring act to promote your bias. PS I've been to the AP and know all about them (clue tell us what I meant here and prove you are a player on this subject)

Q: Better actor......Bob Crane or Alan Alda?: Bob Crane!!! That sex crazed loon was much better than Alda.

Q: How do they get big cranes up on skyscrapers for renovation? and how do they bring it down? And where they keep the cranes after done?: Renovation of skyscrapers typically uses a crane, if it has one, that is built up the side of the building, resting on the ground but fastened to the frame periodically for bracing. Tower cranes are built in sections and assembled in place with smaller cranes. To a large extent, renovation of skyscrapers is done from the inside - modifying some of the existing elevators, rather than doing anything from the outside, breaking through the walls to get stuff inside.

Q: feminists always point to sexism. but Ive found 3 women here - who say they have experienced no sexism, and were pleasantly surprised by how excepting their largely male co-workers have been -: Because it's not interesting to females, they mostly like retail, daycare, hairdressing ect but with high brow jobs they do well in numbers in law and medicine. I hate hearing feminist claim sexism in work like science. I'm in science and yes it is incredibly male dominated to point that sometimes I have been the only female but there was never any sexism at all and the times I was the only female I was treated way better then everyone else. If we look at little further at sex related interests who plays with toy cranes, trucks and lab sets and who plays with barbie and baby dolls? is it really just coincidental? I see females buying the latest fashion or celebrity mag and well guys science, sports and cars. It's obviously not sexism feminists well feminists are just feminists what else would you expect from them.

Q: What should i do to solve tower crane collapse?: tower okorder / to see if whether your trouble is one of those tower crane troubles ?may be you can solve your question under its help.

Q: What type of tower crane does not include tower crane in variable amplitude mode?: Mobile tower crane: a tower crane with running device and can walk.

Q: Does tower crane belong to special equipment?: Tower crane is a high-altitude operation, the type of work belongs to special types of work, equipment belongs to special equipment.

Q: The crane was commissioned in the plant some 15 yrs back. The cranes is being used for lifting hot metal (iron) from furnace to Pig casting machine since commissioning. Regular maintenance is being done on the same.: no you have to asses the related struturals.

Q: What kind of bodies are tower cranes made of?: Two. The metal structure of tower craneThe metal structure of tower crane is mainly composed of underframe, tower body, jacket, upper and lower support, suspension arm, balance arm, tower top and other main components.Metal structure is the framework of tower crane, which bears the deadweight of crane and all kinds of external loads during operation.Three. Power unit and control systemThe power unit is the power source of the crane, and the power source of the tower crane is an electric motor with an external power supply.The control system includes controls and safety devices. Control device for tower crane is composed of a linkage control console, distribution box, resistor box components, the safety device is mainly composed of height limiter, amplitude limiter, lifting weight limiter, moment limiter, slewing limiter etc..Through the control system, the movement characteristic of the crane can be changed, so as to realize the starting, speed regulation, modification, braking and stopping of each mechanism, so as to achieve various actions required by the crane operation.

Q: What are the safety devices in a tower crane?: (1) lift height limit position limiterFor cranes with variable boom angles, the lifting motion must be stopped immediately when the top of the lifting device rises to the 8OOmm at the lower end of the boom.For luffing cranes, lift the top of the hook to the lower end of the frame 500mm. The lifting movement must be stopped immediately.(2) lifting moment limiter and maximum lift limiter;When the lifting torque reaches 90% of its rated value, the lifting torque limiter shall be able to issue an acoustic or red light to indicate the alarm. When the lifting torque exceeds its rated value and reaches 108% of the rated value, the lifting direction and outward direction shall be stopped.If the weight and amplitude indicator are set, the numerical value should be correct, clear and eye-catching. The digital error shall not exceed 5% of the indicated value.When the lifting weight exceeds the maximum weight, maximum lifting weight limiter should emit light or sound alarm, when the load exceeds the maximum weight of 6%, should stop to enhance the direction of movement, but to allow institutions towards the down direction.(3) amplitude limiting deviceA crane shall be equipped with a minimum amplitude limiter and a device for preventing the boom from rebounding backward. The trolley must be equipped with a trolley switch and a terminal buffer.(4) rail clamping device and walking spacing deviceTrack type tower cranes must be equipped with rail clamps. A walking limit device shall be installed at the same time.(5) anemometer;For cranes with a hinge height of more than 50m at the root of the boom, a anemometer shall be installed at the top.(6) lightning protection and anti electromagnetic wave induction device;For the crane whose hinge height is over 50m, the lightning arrester shall be installed according to the actual situation and the electromagnetic interference shall be taken.(7) tower crane shall install limit torque coupling in order to prevent slewing overload.

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