What is the reason for the high noise of spur gear drive?

In addition to running accuracy, load capacity and fatigue life, noise is also an important indicator of the performance of a spur gear drive. Noise not only affects the operating environment of the equipment, but also affects the gear transmission accuracy and the overall operation and transmission of spur gear drives. With the successive issuance of ISO14000 and ISO18000 standards, controlling its transmission noise becomes more and more important.

The reason for the high noise of spur gear drive

SG-I Spur Gear Slewing Drive

1. Influence of gear accuracy: Gear accuracy is often designed with economic benefits as the basis, ignoring the impact of accuracy on drive noise and backlash. When the gear accuracy cannot be reached, it will increase the operating noise.

2. Influence of gear width: Under the condition of constant torque, the noise curve gradient of large tooth width is lower than that of small tooth width, and the noise of small tooth width is relatively large.

3. Influence of tooth pitch and pressure angle: Small tooth pitch can contact more gears at the same time, the overlap of gears increases, and the noise is larger.

4. Influence of gear displacement coefficient: When the gear transmission performance is improved, the bearing capacity, the displacement coefficient, the central moment, etc. are not suitable for operation, it is easy to generate noise.

5. Speed ​​control: The noise of the spur gear drive is also different at different speeds. With the increase of the speed, the noise of the drive will also increase.

6. Influence of dynamic balance: Misalignment of assembly will lead to unbalanced operation of the shaft system, and in the state of semi-loose and semi-tight gear meshing, it will lead to aggravation of driving noise, and unbalanced gear assembly will affect the accuracy of the transmission system.

…

Details can be accessed by clicking here:https://www.ldb-bearing.com/ldb-bearing-knowledge/the-reason-for-the-high-noise-of-spur-gear-drive.html

/by

What should I do if the linear vibrating screen fails?

The linear vibrating screen is driven by double exciters. When the two exciters are rotated synchronously and in opposite directions, the exciting forces generated by the eccentric blocks cancel each other in the direction parallel to the motor axis, and in the direction perpendicular to the motor axis The stack is a resultant force, so the motion trajectory of the screen machine is a straight line. The two motor shafts have an inclination angle relative to the screen surface. Under the combined force of the exciting force and the self-gravity of the material, the material is thrown up on the screen surface and moves forward in a straight line, so as to achieve the purpose of screening and grading the material.

Can be used to automate operations in the assembly line. It has the characteristics of low energy consumption, high efficiency, simple structure, easy maintenance, and fully enclosed structure without dust spillage. The high sieving mesh number is 400 meshes, which can screen out 7 kinds of materials with different particle sizes. In the daily use of the linear vibrating screen, it is inevitable that some damage will not occur. The following vibrating screen manufacturers will introduce the common faults and solutions of the linear vibrating screen in detail.

Linear vibrating screen

1. Pipe beam fracture

If the wall of the tube beam is too thin, it may cause fracture. In this case, the same type of thick-walled tube or a larger type of tube beam should be used. But it should not be too large or too thick, because this will increase the vibration quality of the sieve and bring about many problems; the connection of each sieve plate of the dehydration and de-intermediation screen must have horizontal and vertical layers. If there is no vertical layer, water The pipe beam will leak from the gap between the screens and the pipe beam will be easily broken at the flushing place; the wider the screen, the easier the pipe beam will be broken.

…

Details can be accessed by clicking here:https://www.hsd-industry.com/news/common-problems-of-linear-vibrating-screen/

/by

Detailed explanation of the selection of briquetting machine

There are many types of ball press equipment, and it is also a widely used equipment, such as: chemical, energy, transportation, refractory, electric power, metallurgy and other industries are inseparable from the support of the ball press, so the selection of the ball press , how should I choose?

Misunderstandings in the selection of briquetting machine

High pressure briquetting machine

1. It is believed that the larger the diameter of the briquetting machine, the higher the output will be.

This is correct to a certain extent, but it is not inevitable. For the processing of a certain material, the process requirements are different, and the selection of the briquetting machine is actually different. The amount of processing is not necessarily small.

2. It is believed that the higher the linear pressure ratio of the briquetting machine, the better

In fact, the line pressure ratio of the briquetting machine is the result of the test to obtain a certain technological purpose. Reasonable is good, not the higher the better.

…

Details can be accessed by clicking here:https://www.zymining.com/blog/selection-of-briquetting-machine.html

/by

Three-dimensional growing rack classification introduction

Three-dimensional cultivation is also called vertical cultivation. Three-dimensional soilless cultivation is carried out by using three-dimensional growing racks. This kind of cultivation is carried out under the condition of not affecting the plane cultivation. Gradient layered cultivation, developing towards space, making full use of greenhouse space and solar energy to improve land utilization by 3~5 liters, which can increase the yield per unit area by 2~3 times.

Soilless culture is suitable for three-dimensional cultivation because of its light substrate and easy automation of the nutrient solution supply system. The three-dimensional growing rack is also called the three-dimensional growing tank, the three-dimensional growing tank for seedlings, and the soilless cultivation tank.

Grow racks

First, the classification of planting racks:

Growing racks can be used for various forms of growing, 1. Three-dimensional elevated type 2. Hanging growing type 3. Planting type flat on the ground; three-dimensional growing grooves can be used for soilless three-dimensional cultivation and planting, with matrix fertilizer or nutrient solution in the groove. The seedling matrix tank can be used for standing seedlings in greenhouses and common terrestrial seedlings.

Material: Environmentally friendly PVC

Size: large, small

Size: Top slot Height: 25cm Top width: 30cm Bottom width: 20cm

Side Slot Height: 16cm Top Width: 20cm Bottom Width: 12cm

Thickness: 3.0mm-3.5mm

Length: 3 meters, 4 meters, 6 meters, can be produced according to customer needs, the length is not limited

Color: White

Applicable: greenhouse planting, balcony vegetable garden, greening engineering, horticulture, flower garden nursery, etc.

Features: flame retardant, anti-corrosion, lightweight, durable, high light, convenient construction

…

Details can be accessed by clicking here:https://www.etegreen.com/blog/three-dimensional-growing-rack-classification-introduction/

/by

[2022 “Super Tiger Imagination”] Lingyu’s new hybrid mixer truck, a sneak peek!

CLY5315GJB29E68 concrete mixer truck

Concrete mixer truck

Based on the needs of users, CIMC Lingyu has continuously researched and innovated, breaking through the limit of lightweight again and again. Under the guidance of national policies, it has brought a new CLY5315GJB29E68 concrete mixer truck. Let Xiaobian lead you to have a sneak peek!

Concrete mixer truck

Electric body, green and low carbon

Hybrid electric bodywork, taking into account the different operating states of the vehicle, reduces engine load and working time, and improves engine reliability; realizes constant speed control of the tank and improves vehicle driving stability; braking energy recovery, vehicle flameout operation, fuel saving and emission reduction, green low carbon.

Concrete mixer truck

No sub-beam structure, safe driving

Adopt a new sub-beamless structure, carry out CAE analysis on the chassis and body, and design lightweight. The weight of the whole vehicle is lighter, the center of gravity is lower, the strength is higher, the structure is reliable, more economical, and the driving is safer.

Concrete mixer truck

Assembled vehicle, off-site CKD

It adopts an outsourced front desk, a combined backstage and a support frame, an independent pull rod, the water tank and the main tank bracket can be disassembled and assembled in one piece, and the modular design of each part of the upper part can be quickly disassembled and assembled to realize CKD in different places, which is convenient for the secondary upgrade of products and Diversified options for users.

…

Details can be accessed by clicking here:https://www.ly-cimc-linyu.com/news/performance-of-cly5315gjb29e68-concrete-mixer-truck/

/by

Ruixue Mega Year! Have you seen Linyu like this?

Linyu in the snow

Linyu

Ruixue flutters white Linyu factory

Snow country chariot dressed in enchanting silver

Domineering and restrained, showing a bit of a coquettish attitude

Put away the ingenuity, show the chivalrous bones

Linyu

Linyu

Dense pine covered with goose down

Sparse sycamore, Qiongzhi root upward

Cold plum turui reports the spring in the world

Withered trees come in spring, change to jade and butterfly clothes

Linyu

Linyu

…

Details can be accessed by clicking here:https://www.ly-cimc-linyu.com/news/linyu-in-the-snow/

/by

What are the procedures to pay attention to when purchasing shelves? What are the purchasing skills?

In recent years, with the rapid development of my country’s logistics industry, the supporting storage shelves have become increasingly popular, and the number of warehouse shelf manufacturers and commodity types has also increased. I believe that every consumer wants to know how to choose a storage shelf with a good value for shopping.

The process of purchasing shelves

Industrial racking

1. Choose the right type of shelf

It is necessary to choose the appropriate shelf form according to the specifications and characteristics of your own goods, so as to improve the utilization rate of the shelves, and at the same time improve the efficiency of the warehouse. You can consult the shelf manufacturers when designing the warehouse system.

2. Pay attention to the construction period of the shelf

Because most shelves are custom-made, it is necessary to reserve time for design, production, transportation, and installation when purchasing.

3. On-site conditions for installing shelves

Nowadays, many projects require racks to be installed in the construction of civil works. In fact, when the installation conditions are not met, the racks are required to enter the site for construction, which often results in uncontrollable construction period of racks, and the quality of rack construction cannot be guaranteed; good construction Environment is an important guarantee for product quality and construction period.

…

Details can be accessed by clicking here:https://www.etegreen.com/blog/shelf-purchasing-skills/

/by

Three major fault solutions of automatic square bottom machine

The square bottom machine is a paper bag with the end of the bottom sealed, through automatic conveying, automatic bottom opening, automatic bottom card release (non-intermittent type), automatic full glue spraying, cold glue spraying, automatic bottom paste, automatic compaction and other processes, the output is Back cover paper bag. This machine is operated by touch screen and controlled by optical fiber. One machine has four tubes and four guns. The spray guns can independently control the glue quantity and spray length, and the four guns can also be operated at the same time.

The square bottom machine bag has uniform glue spraying, high bag making accuracy and fast speed, and can produce various specifications of bags. However, various problems may occur in the square bottom machine during the bag making process, and the reasons need to be investigated and dealt with in time solve.

square bottom machine

HD200D-IIIDJ Square Bottom Machine

Top and bottom films are prohibited
The prohibition of upper and lower sheets refers to the question that the front and rear sides are not aligned when making bags

1. Reasons: (1) The thickness of the composite film is uneven, and there are lotus leaf edges; (2) The tension of the double floating rollers is too small; (3) Some rollers rotate unevenly.

2. Solution: (1) Check and adjust the relevant guide rollers (such as compensation rollers, deflection rollers, etc.). (2) Adjust the tension of the double-lift floating rollers.

…

Details can be accessed by clicking here:https://www.lyhuatianm.com/products-information/square-bottom-machine-fault-solution.html

/by

DETAILED EXPLANATION OF HIGH-PURITY CALCIUM HYDROXIDE PROCESSING PROCESS

Calcium hydroxide is obtained from the chemical reaction of calcium oxide and water, and is a traditional product of inorganic chemical industry. The processing method of high-purity calcium hydroxide is more complicated than that of ordinary calcium hydroxide, and it needs to use raw materials with high activity and low impurity content for processing. With the increase in market demand, the quality of calcium hydroxide on the market is also mixed, which needs to be carefully identified.

THE PROCESS OF HIGH-PURITY CALCIUM HYDROXIDE PROCESSING

1. Primary screening

Take limestone and coke for calcination, and calcined calcium oxide with a vibrating screen of 5~15mm to remove the “plain ash” with more impurities, and then crush it to about 5~25mm to obtain more than 90% effective components. High-activity calcium oxide is supplied to the pre-digester through a constant-weight feeder through an air-tight regulator. To remove iron, sulfate and other impurities in slaked lime, first of all, the quality of raw and fuel materials must be strictly controlled, and raw and fuel materials with high iron content (including other oxides) are strictly prohibited from entering the site.

2. Preliminary digestion

According to the quality of calcium oxide and the ratio of supply, according to the range of water-to-calcium ratio of 0.55~0.80, use the control valve to automatically adjust the amount of water added, so that it is mixed and stirred in the pre-slider for 5~15 minutes for preliminary digestion, and the digestion temperature is controlled to 90 ~190°C, and then sent to the ripener for further digestion for 10~40 minutes to ensure complete digestion reaction.

…

Details can be accessed by clicking here：https://www.ly-gaifeng.com/blog/high-purity-calcium-hydroxide-processing-technology.html

/by

Why do university lecture halls use row chairs?

We all know that the classrooms in universities and colleges are much larger than those in primary and secondary schools. The ground is also stepped, and row chairs are usually installed, which not only makes reasonable use of space, but also enables students in each area to see the blackboard in front. So, do you know why the university lecture halls use row chairs more?

The correct configuration of school furniture effectively affects the learning efficiency of students. Nowadays, with the changes of the times, row desks and chairs are more and more popular in schools. They are fashionable and popular with students. Therefore, many colleges and universities When choosing desks and chairs, they like to purchase desk rows.

Most of the row chairs used in the amphitheater are composed of four parts: seat, back, armrest and standing feet. The structure is generally steel-wood structure or steel-plastic structure.

Lecture-Hall-Step-Desk-Wooden-Ladder-Chair2

1. The seat board can be automatically recycled

Because the form of row chairs is different from that of ordinary student desks and chairs, usually desks and row chairs adopt a silent and slow-rebound spring structure, so the seat plate of the ladder desk can be automatically recovered during use. This can effectively save school classroom space, make good use of the space, provide students with a high-quality learning environment, and effectively improve students’ learning efficiency.

…

Details can be accessed by clicking here:https://www.aoyangschoolfurniture.com/aoyang-news/why-do-university-lecture-halls-use-row-chairs.html

/by