How to overhaul the main parts of the tractor clutch

The overhaul of the tractor is inseparable from the overhaul of the clutch components. In order to improve the maintenance quality of the tractor, the overhaul methods and standards of the main components of the tractor clutch are introduced in detail.

The tractor clutch is composed of four parts: the active part, the driven part, the pressing mechanism and the operating mechanism. The main component of the active part is the driving disc; the main component of the driven part refers to the driven disc with friction linings riveted on both sides; the main components of the pressing mechanism are the pressing spring, pressing lever, and pressing rod bracket; The main components are separation lever, separation bearing, etc. The following tractor clutch manufacturers talk about the maintenance of the main components of the tractor clutch based on actual experience.

Overhaul of drive and driven discs

The main damage of the active disk is wear, scratches, burns and cracks on the friction surface; warpage and deformation of the friction surface. When the thickness of the active disc is 18±0.1 mm, the surface groove depth exceeds 0.50 mm, the arch deformation exceeds 0.30 mm, and the flatness tolerance exceeds 0.12 mm, it should be ground or flat. However, after polishing, its thickness is not less than 16±0.40 mm. If the active disk is cracked or too thin, it should be replaced with a new one.

The driven disc is the most vulnerable part of the clutch. The main damage is wear, hardening, burns, cracks on the surface of the friction plate, oil stains on the surface (dry type), loose friction plate, warping and deformation of the driven disc, fracture of the steel plate, loose riveting between the steel plate and the disc, spline holes wear, etc. It can be determined by measuring the depth of the rivet head with a vernier caliper. The burial depth of the rivet head shall not be less than 0.3 mm, otherwise, use a new friction plate. If the friction plate is seriously worn or there are more than two cracks and fall off, and the burnt surface is large and deep, the new plate should be riveted again. If there is a slight oil stain on the friction plate, it can be burned off with the flame of a blowtorch, or cleaned with gasoline, and the slight burnt surface can be polished with sandpaper.

When replacing the new piece to remove the old piece, use a drill bit 0.40-0.50 mm smaller than the diameter of the old rivet to drill out the rivet head, and then gently punch out the old rivet and remove the old piece. Use a wire brush to remove dust and rust from the driven disc, and check other parts of the driven disc. The warpage of the driven disc steel plate will cause the clutch to vibrate and wear unevenly when starting, so its warpage should be checked. The warpage of the driven disc steel sheet is also called circular runout or yaw. It can be installed on the inspection frame and measured at the outermost edge of the driven disc with a dial indicator. The circular runout limit is 0.80 mm. If it exceeds the limit, it can be calibrated by cold pressing with a special clamp;

13-Inch-(2)

Repair of elastic push rods

The main damage of the elastic push rod is the weakening of the elastic force, the reduction of the hole center distance, the wear of the support hole, and the breakage of the elastic push rod. After the elastic force of the elastic push rod is reduced, it is heated to 780 ~ 810 ° C, quenched in oil, and then heated to 450 ~ 475 ° C for tempering.

When the center-to-center distance of the elastic push rod becomes smaller, the original center-to-center distance can be restored by thermal deformation method. between the mouth. Increase the center distance of the holes, and then perform quenching and tempering according to the above method. When the center distance of the pin holes is enlarged, care should be taken to make the center lines of the two pin holes parallel. When the fitting clearance of the pin hole of the elastic push rod is greater than 0.50 mm, it can be repaired by the maintenance dimension method. The maintenance size can be increased by 1 mm, and the fitting clearance between the pin and the hole is 0.12 mm.

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Details can be accessed by clicking here：https://www.syclutch.com/news/overhaul-of-the-main-parts-of-the-clutch.html

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What are the misunderstandings in the purchase of compact racks?

Compared with other single products, the compact rack is a systematic project and also includes many service elements. Most customers buy for several years, maybe once every ten years, and it is not by people when they buy. There are inevitably many misunderstandings when buying dense racks. Let’s take a look~

Misunderstandings in choosing a compact rack

Mobile shelving

1. Too much emphasis on low prices and not on the quality of dense racks

Regardless of whether you choose a smart or manual compactor, at the same price point, you need to know which file compactor to choose. Price is often closely related to cost. Low-cost dense racks are not very good in appearance and design due to their low cost and poor quality. Experienced buyers understand that if you buy low-priced items, there are often many unpredictable security risks that cause many problems.

2. Choose the type of file rack at will

When building archives, you must consume rationally, and what suits you is the best. Because you don’t know the types of file racks, and you don’t know which product rack is suitable for you, it is recommended to choose carefully.

If you want your file management to be simpler, more technological and intelligent, and if you have enough money, you can buy a smart shelf. In the manufacturing process, the intelligent shelf is more integrated into the intelligent file management system, with intelligent voice control, security protection, sound and light positioning, and rapid retrieval of file information.

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Details can be accessed by clicking here:https://www.etegreen.com/blog/misunderstandings-in-the-purchase-of-compact-racks/

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What are the application ranges and functions of valve bags?

The valve bag made by the bottom paste machine has the characteristics of good moisture resistance, reasonable cost and high production efficiency. It is suitable for the packaging of various powdery colloidal products. effect.

Application scope of valve bag

1. Industrial aspects

It is a powder product packaging for building materials powder, chemical raw materials, pharmaceutical additives, cement, quartz sand, cellulose, polyvinyl alcohol, dispersible latex powder and other materials. Due to the particularity of the product, the packaging bag must meet the requirements of moisture-proof, moisture-proof, dust-proof, easy to stack, not easy to slip, not easy to damage, impact resistance and so on!

2. Agricultural products

The valve bag is an ideal packaging container for powder, granular, flake, flocculent and thick materials such as fertilizers and pesticides used in agricultural production. It is widely used in industrial and agricultural packaging. The valve bag can realize high-speed filling, flexible valve port, neat stacking, strong firmness, no dust leakage, packaging, moisture-proof and moisture-proof. It is a packaging that is particularly popular and widely used by businesses. The use of the packaging bag saves production time and reduces labor costs for enterprises.

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Details can be accessed by clicking here:https://www.lyhuatianm.com/products-information/application-range-of-valve-bag.html

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INTRODUCTION TO THE ROLE OF CALCIUM HYDROXIDE

Calcium hydroxide, commonly known as hydrated lime, is a white powdery solid. The products produced by the professional calcium hydroxide production line are mainly used for rescue equipment such as compressed oxygen self-rescuers and positive pressure oxygen respirators, which are used to absorb carbon dioxide exhaled by miners.

CALCIUM HYDROXIDE PRODUCT INDEX

1. Whiteness: >90 degrees;

2. Fineness: >325 meshes;

3. Calcium content: >95%;

4. Moisture content: <2%.

ADVANTAGES OF CALCIUM HYDROXIDE

1. The whiteness is clear blue and white, and the appearance is good;

2. No impurities exist, high purity;

3. Good solubility, no precipitation, the solution will drop after being placed for more than a month and shake gently;

4. It is smooth after soaking in water and has good construction, which is beyond the reach of ash calcium produced in other places.

CALCIUM HYDROXIDE USE

calcium hydroxide

The specific application of calcium hydroxide sewage treatment

1. It can neutralize free acid in wastewater and acid salt in wastewater.

2. In wastewater, where hydroxide ions can react with metal ions to produce water-insoluble precipitates.

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

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Precautions for installation, commissioning and maintenance of linear vibrating screen

Linear vibrating screen structure and functional description of each part, linear vibrating screen is mainly composed of screen box, screen frame, screen mesh, vibrating motor, motor base, vibration damping spring, bracket, etc. The following vibrating screen manufacturers will introduce each linear vibrating screen in detail Parts composition, installation, use and maintenance work.

Structural composition of linear vibrating screen

1. Screen box: It is welded by several steel plates of different thicknesses. It has certain strength and rigidity and is the main part of the screening machine.

2. Screen frame: made of pine or wood with small deformation, it is mainly used to keep the screen flat and achieve normal screening.

3. Screen: There are several kinds of screens such as low carbon steel, brass, bronze, stainless steel wire.

4. Vibration motor (please refer to the vibration motor operation manual for operation and maintenance methods).

5. Motor base: install the vibration motor. Before use, the connecting screw must be tightened, especially three days before the trial of the new mesh screen machine, it must be tightened repeatedly to avoid accidents caused by loosening.

6. Damping spring: prevent vibration from being transmitted to the ground and support the overall weight of the screen box. When installed, the spring must be perpendicular to the ground.

7. Support: It consists of four columns and two channel steels to support the screen box. When installing, the columns must be perpendicular to the ground, and the channels under the two columns should be parallel to each other.

Linear Vibrating Screen

Preparations for installing linear vibrating screen

1. Check whether the motor logo meets the requirements.

2. Measure the insulation resistance with a 500-volt megger, and dry the stator winding at a temperature not exceeding 120.

3. Check the motor fasteners and beware of loosening.

4. Check whether the motor surface is damaged or deformed.

5. Check whether the rotation is flexible. If there is any abnormality, it should be excluded.

6. Check whether the power supply is out of phase, and run for 5 minutes with no load.

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

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What are the types of belt conveyor idlers?

The idler is an important part of the belt conveyor . If there is a problem with the idler, it will definitely affect the life of the belt conveyor . Since the idler is so important, the conveyor manufacturer will share with you what are the types of belt conveyor idlers?

1. Groove upper idler

The standard groove angle of the grooved idler is 35°, so the 35° grooved idler and the 35° grooved forward-tilt idler are mostly used in a conveyor, and in the selection of these two types of idlers There are three forms, namely full forward tilt and partial forward tilt (one set of forward tilt rollers in every 5 sets of upper rollers) and no forward tilt rollers. At present, the first two types of idlers are relatively common. Of course, there are 45-degree grooved idlers and 45-degree grooved forward-tilt idlers.

2. Buffer roller

Common buffer idlers have 35-degree and 45-degree grooved idlers. Under normal circumstances, if you are using a cotton fabric core conveyor belt, you can only use a 35-degree grooved buffer idler. The 45-degree grooved buffer idler can be used in the section where the guide groove is not impacted by the material.

3. Transition roller

Screw conveyor

4. Return roller

The standard style of the return idler is still the parallel lower idler, and it is also the lower idler that is used more at present. In addition, the parallel lower idler has two forms: single-roller type and double-roller type. As for which one to use, the designer should choose according to the bearing capacity of the idler. And according to the research, it is found that making the lower idler into a two-roller V-shape has a certain effect on preventing the deviation of the lower branch of the conveyor belt, especially the V-shaped forward tilting lower idler has a more obvious anti-deviation effect.

5. Comb roller

Comb rollers are not used in many places, and most of them are used in conveyors specially designed for conveying viscous materials.

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Details can be accessed by clicking here:https://www.zymining.com/blog/types-of-belt-conveyor-idlers.html

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What are the considerations for choosing a oil tank truck?

In fact, refueling trucks, oil trucks, and oil tank trucks have a collective name: tank trucks, but each place is called differently, and the requirements for registration are also different.

The current oil tank trucks are divided into: Dongfeng brand oil tank truck, Jiefang brand oil tank truck, Foton Omark oil tank truck (high-end brand), Foton oil tank truck (the most fuel-efficient model), Jianghuai brand oil tank truck. Also There are heavy trucks, Shaanxi oil tank truck, etc…

According to the tonnage, tank trucks are divided into: blue card 2-ton small tanker, yellow card 5-ton tanker (the most commonly used and cost-effective), 8-ton tanker, 10-ton tanker, 12-ton tanker (single-axle large truck) Tonnage), 15-ton, 20-ton oil tanker (small 3-axle, rear double axle), 25-ton 30-ton tank trucks (front four and rear eight), 40-ton semi-trailer tanker.

oil tank truck

According to the material of the tank, the tanker is divided into: carbon steel tanker (easy to rust), stainless steel tanker (higher cost, anti-corrosion, clean, low tank loss), aluminum alloy tanker (the weight of the tanker Light, anti-corrosion, hygienic, high tank strength). The editor explained it this way, you should know how to choose a tanker that suits you, but you must pay attention to the following aspects in the selection process.

1. Oil tank trucks will encounter many emergencies in the process of oil transportation and refueling. The safety of oil tankers is particularly important when accidents occur. In recent years, oil tanker accidents have emerged one after another. On the one hand, it is due to improper operation and negligence of personnel, and on the other hand, it is related to the car itself. Good products can minimize the loss of accidents.

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Details can be accessed by clicking here:https://www.ly-cimc-linyu.com/a/news/precautions-for-the-selection-of-oil-tank-truck.html

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WHAT IS THE DIFFERENCE BETWEEN FORGING AND CASTING?

To put it simply, forging is to smash metal into the shape you want, and casting is to melt the metal and then re-solidify it into the shape you want. Forging is to mechanically shape metal into the shape you want. (There are two methods, cold and hot.) Casting is to melt the metal and pour it into a prepared sand mold or mold. After cooling, it solidifies into the shape you want. .

Forging is a processing method that uses a forging machine to apply pressure to a metal blank to plastically deform it to obtain a forging with certain mechanical properties, certain shape and size, and is one of the two major components of forging (forging and stamping). Through forging, defects such as as-cast looseness produced by the metal during the smelting process can be eliminated, and the microstructure can be optimized. At the same time, due to the preservation of the complete metal streamline, the mechanical properties of forgings are generally better than those of castings of the same material. For important parts with high load and severe working conditions in related machinery, forgings are mostly used in addition to rolling plates, profiles or welded parts with simple shapes.

A processing method of using a forging machine to apply pressure to a metal blank to plastically deform it to obtain a forging with certain mechanical properties, certain shape and size. One of the two major components of forging. Through forging, the as-cast looseness and welding holes of the metal can be eliminated, and the mechanical properties of forgings are generally better than those of castings of the same material. For important parts in machinery with high load and severe working conditions, forgings are mostly used in addition to rolling plates, profiles or welded parts with simple shapes.

FORGING CAN BE DIVIDED INTO

①OPEN FORGING (FREE FORGING)

Using impact force or pressure to deform the metal between the upper and lower abutting irons (anvil blocks) to obtain the required forgings, there are mainly two types of manual forging and mechanical forging.

②CLOSED MODE FORGING

The metal blank is compressed and deformed in a forging die cavity with a certain shape to obtain a forging, which can be divided into die forging, cold heading, rotary forging, extrusion, etc. According to the deformation temperature, forging can be divided into hot forging (processing temperature is higher than the recrystallization temperature of the billet metal), warm forging (lower than the recrystallization temperature) and cold forging (normal temperature). Forging materials are mainly carbon steel and alloy steel of various compositions, followed by aluminum, magnesium, titanium, copper, etc. and their alloys. The original state of the material is bar, ingot, metal powder and liquid metal. The ratio of the cross-sectional area of ​​the metal before deformation to the die cross-sectional area after deformation is called the forging ratio. Correct selection of forging ratio has a lot to do with improving product quality and reducing costs.

THE DIFFERENCE BETWEEN CASTING AND FORGING

Forged valve bracket

1. THE PRODUCTION PROCESS IS DIFFERENT

Casting is a forming. After the metal is melted into liquid, it is cast into a casting cavity suitable for the shape of the part, and after it is cooled, solidified and cleaned, the processing method of the part or blank is obtained. The foundry major focuses on the metal smelting process and the control of the process during the casting process.
Forging is slow forming. The method of applying pressure, extrusion, hammering and other methods to the metal blank with a forging machine makes the metal material in the plastic state a processing method of a workpiece with a certain shape and size. Forging is plastic forming in the solid state, which can be divided into hot working and cold working, such as extrusion, drawing, pier thickening, punching, etc.

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Details can be accessed by clicking here:https://www.gold-emperor.com/the-difference-between-forging-and-casting/

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How to correctly install the tower crane slewing bearing

Tower crane slewing bearing is a kind of large special structure bearing that can bear large axial load, radial load and overturning moment and other comprehensive loads at the same time. In addition, the slewing bearing itself has the characteristics of compact structure, convenient guide rotation, easy installation and easy maintenance. How to correctly install the tower crane slewing bearing, the slewing bearing manufacturer reminds you to start from the following aspects:

First, carry out anti-rust treatment on the product

Considering the harsh working conditions of tower cranes, good anti-rust treatment can maintain the performance of the slewing bearing. Before the products leave the factory, the company has taken special paint or oxidation treatment measures on the outer surface of the products. The equipment has a long durability. According to the special requirements of customers, chrome plating (TDC) or nickel plating can also be used.

tower crane slewing bearing

Second, the installation of tower crane slewing bearing

During installation, after the slewing bearing is hoisted in place, use a feeler gauge to check the flatness of the fitting plane, and the specific allowable flatness value shall be implemented in accordance with relevant regulations. If the clearance is too large, it should be re-machined. If the required flatness cannot be achieved by machining, plastic filling or partial gaskets can be used to ensure the accuracy of the installation plane and reduce vibration. In order to avoid the deformation of the slewing plate bearing after the bolt is tightened, which will affect the normal operation of the slewing plate bearing.

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Details can be accessed by clicking here:https://www.excavatorbearing.com/a/bearing-knowledge/tower-crane-turntable-bearing-installation.html

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Installation method and process of flexible bearing of harmonic reducer

The flexible bearing of harmonic reducer is a kind of bearing of harmonic reducer. It is a kind of bearing used outside the harmonic generator, which can realize the speed change requirement of large transmission ratio. Because of its special overall structure, it is installed in time is different from other types of bearings.

Assembly method of flexible bearing of harmonic reducer

Harmonic reducer flexible bearing

1. Arc fill ball groove method

This method is actually that when the ball filling angle is greater than 195°, a circular arc groove that is larger than the diameter of the steel ball is opened in the distance from the inner and outer ring ribs to the bottom diameter of the groove. The steel balls are respectively filled into the channels. The arc ball-filling groove method has low installation efficiency, high production cost, and poor quality control, because if the ball-filling groove is deep, the ferrule will be scrapped; if it is shallow, the steel balls cannot be filled. Improper grooving will greatly reduce high-speed performance and limit axial play.

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Details can be accessed by clicking here:https://www.prsbearings.com/a/news/Harmonic-reducer-bearing-installation.html

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