The use and type of cylindrical gear reducer reducer

Mainly used

The gears of the cylindrical gear reducer are processed by carburizing, quenching and gear grinding, with high bearing capacity and low noise; they are mainly used in belt conveyors and various transportation machinery, and can also be used in transmission mechanisms of other general machinery.It has the advantages of high bearing capacity, long life, small size, high efficiency, light weight, etc. It is used in transmissions where the input shaft and output shaft are arranged in a vertical direction.

Application field
Cylindrical gear reducers are widely used in metallurgy, mining, lifting, transportation, cement, construction, chemical, textile, printing and dyeing, pharmaceutical and other fields.

type
ZQD cylindrical gear reducer
ZQD type reducer is under the premise of not changing the position and installation size of the input and output shafts of ZQ type reducer as far as possible, adding a high-speed stage called three-stage transmission, and the added high-speed stage is at the top.

Cylindrical gear reducer reducer
ZQD large transmission ratio cylindrical gear reducer has six specifications: ZQD350+100, ZQD400+100, ZQD650+150, ZQD850+250 and ZQD1000+250.

ZQA cylindrical gear reducer
The ZQA reducer is an improved design based on the ZQ reducer. In order to improve the gear bearing capacity and facilitate the replacement of the ZA reducer, the material of the gear shaft is changed under the condition that the shape, shaft end and installation size remain unchanged. , the gear shaft is 42CrMo, the large gear is ZG35CrMo, the quenched and tempered hardness of the gear shaft is 291~323HB, and the large gear is 255~286HB.ZQA reducer is mainly used in lifting, mining, general chemical, textile, light industry and other industries.

ZSC type cylindrical gear reducer
On the basis of absorbing the design and manufacturing experience of similar products at home and abroad, ZSC reducer is a series of products formed through improvement and optimization, which are widely used in metallurgy, machinery, petroleum, chemical industry, construction, textile, light industry and other industries.
Performance characteristics of ZQA cylindrical gear reducer:
(1) The gears are all made of high-quality alloy steel after carburizing and quenching, and the hardness of the tooth surface reaches 54-62HRC.
(2) The main parameters such as center distance and nominal transmission ratio have been optimized, and the main parts and components are interchangeable.
(3) Oil pool lubrication is generally used and natural cooling is used. When the thermal power cannot be satisfied, circulating oil lubrication or fan cooling coil cooling can be used.
(4) Small size, light weight, high precision, large carrying capacity, high efficiency, long life, high reliability, stable transmission and low noise.

We often have the problem of machine failure in the reducer in our life. When there is a problem with the machine, it will definitely affect the progress of the work and even bring a lot of unnecessary damage. If there is a problem with the reducer, how to deal with the ZQD cylinder What about the maintenance of the gear reducer? We first need to inspect the reducer before maintenance, and then carry out the specific disassembly work. Let's take a look together.

Preparations before maintenance:
(1) Preparation for on-site inspection.The overhaul site implements fixed location management. Before starting work, complete the layout of the overhaul site, check that all safety measures must be implemented, the work ticket has been processed, and the opening conditions are met.

(2) Preparation of spare parts and T equipment.Before opening the T, conduct a comprehensive inspection and check on the materials and spare parts used in the maintenance to ensure they are in good condition and available; conduct a comprehensive visual inspection and experiment on the maintenance tools used, cable reels, electric tools, and lifting tools. Within the inspection period, and the appearance inspection is qualified.After passing the inspection, all of them will be transported to the designated location on the maintenance site.

(3) Disclosure before work.The person in charge of the work explains the safety precautions, maintenance quality requirements, and T operation progress to the Ding team, and enters T to start the on-site maintenance work.

(4) Preparation of maintenance guidance documents.The maintenance guidance document refers to the steps to complete the maintenance work, process requirements and acceptance quality standards. The maintenance site must strictly implement this document and perform relevant acceptance procedures.It mainly includes maintenance document package, maintenance manual, defect elimination T technical card, etc.These documents must be compiled and approved before opening, and the maintenance personnel should be organized to study and discuss.

(5) In order to successfully complete a large-scale maintenance work, it is necessary to do a good job of 'seven points of preparation, i points of work'. The pre-work preparation is very important, mainly including the preparation of maintenance guidance documents, spare parts and tools, and on-site inspection preparations , Pre-job disclosure, etc.

After the inspection work is finished, how to disassemble the reducer? And what are the related precautions? Let's take a look.

(1) Mark the relative position of the upper and lower joint surfaces of the reducer, remove the fastening bolts on the joint surface of the upper and lower covers of the reducer, replace the damaged bolts, and remove the positioning pins.Check whether the bolts are damaged or damaged, and screw the nuts onto the screw rods for safekeeping.

(2) Make assembly marks on each bearing end cover, remove the fastening bolts of the bearing end cover, take off the end cover, measure the thickness and number of asbestos gaskets on the bearing end cover with an outer micrometer, and make original records.Preliminary inspection of the bearing end cover, there is no wear and crack on the end face of the seam.

(3) Before jacking up the upper cover, check whether there are missing screws and other abnormal phenomena (jack up the upper cover with jacking screws, and hoist it to the prepared backing plate, and the crane operation shall be on duty with a certificate) .Special attention: the original meshing position of the gears should be marked, and the meshing should be carried out in the original order when reassembling.

(4) Disassemble the protective cover of each part, disassemble the motor and brake wire, pay attention to mark when disassembling the wire, and use it as a reference when reassembling.

(5) Remove the pin of the high-speed shaft coupling of the reducer, untie the toothed coupling of the low-speed shaft, and move the two halves of the coupling to both sides.Before disassembling the couplings of the high and low speed shafts of the reducer, the relative positions must be marked with a flat shovel or a sample punch, as the basis for the relative positions of the couplings.

(6) Remove the anchor bolts of the motor and hang down the motor.When removing the anchor bolts of the motor, record the thickness and position of the original anchor gaskets as a basis for alignment.Loosen the brake anchor bolts, remove the brake adjusting screw, disassemble the brake, and remove the brake.Remove the backstop of the reducer and place it in the designated position to avoid bumping.