Compare the advantages and disadvantages of chain drive vs belt drive

What are the advantages, disadvantages and characteristics of belt drive and chain drive?

Synchronous belt drive or belt drive refers to the transmission belt between the driving wheel, the driven wheel and the link pulley.

Now we understand how the timing belt drive works:

1.The synchronous belt is composed of steel wire as the tensile body, wrapped with polyurethane or rubber;

2.The process of transmitting rotary motion and power between the driven shafts of the driving wheel, and utilizing the transmission parts between the linked pulleys to transmit the power to the driven wheels;

Structural characteristics of synchronous belt transmission:

1.The cross-section is rectangular;

2.Annular transmission belt with equidistant and transverse teeth on the belt surface;

3.The wheel surface of the timing pulley also has the tooth profile of the transmission belt tooth profile;

Transmission characteristics of synchronous belt drive:

1.The transmission is mainly realized by the meshing between the timing belt teeth and the synchronous belt wheel teeth;

2.There is no relative sliding between the timing belt and the timing pulley, so as to achieve the synchronization of circumferential speed;

Advantages of synchronous belt drive:

1.The transmission ratio is constant;

2.Compact structure;

3.Due to the thin and light belt, high tensile strength, high belt speed, the transmission ratio can reach 10, and the transmission power can reach 200 kW;

4.High transmission efficiency, up to;

Now let's understand how chain drives work:

1.The chain drive is composed of sprockets and annular chains;

2.The meshing between the chain and the sprocket teeth is actually based on the co-directional transmission between the parallel shafts;

Characteristics of chain drive relative to belt drive:

1.The sprocket drive has no elastic sliding and slipping, and can maintain an accurate average transmission ratio;

2.The manufacturing and installation accuracy is low, and the transmission structure is simple when the center distance is large;

3.The required tension is small, and the pressure acting on the shaft is small, which can reduce the friction loss of the bearing;

4.The structure of the chain drive is compact;

5.Compared with belt drive, it can work in harsh environments such as high temperature and oil pollution;

Similarly, chain drive has its attendant drawbacks:

1.The smoothness of the chain drive is poor;

2.There's a bit of impact and noise;

3.Instantaneous speed and instantaneous gear ratio are not constants;

Maifu is a rookie in China's belt drive industry, and hopes to continuously improve product quality and professional technology through years of hard work.

It depends on what kind of machine you're using.

Features Compared to belt drive, chain drive has no elastic slip and slipAble to maintain accurate average gear ratios; The required tension is small, and the pressure acting on the shaft is also small, which can reduce the friction loss of the bearing; Compact structure; It can work under harsh environmental conditions such as high temperature and oil stains. Compared with gear drives, chain drives have lower manufacturing and installation accuracy requirements; When the center distance is large, its transmission structure is simple. The instantaneous chain speed and instantaneous transmission ratio are not constants, so the transmission smoothness is poor, and there is a certain impact and noise in the work.

The average transmission ratio of chain drive is accurate, the transmission efficiency is high, the distance between the shafts is adaptable, and it can be used in the environment with high temperature and high humidity; However, the chain drive can generally only be used as a parallel shaft transmission, and its instantaneous transmission ratio fluctuates, and the transmission noise is large. Since the chain links are rigid;

As a result, there is a polygon effect (i.e., non-uniformity of motion), which causes the instantaneous transmission ratio of the chain drive to change and cause additional dynamic loads and vibrations, which must be considered when selecting the chain drive parameters. Chain drives are widely used in transportation, agriculture, light industry, mining, petrochemical industry and machine tool industry.

Number of sprocket teeth. In order to improve the stability of the movement of the chain drive and reduce the dynamic load, it is better to have more teeth for small sprockets. However, the number of small sprocket teeth should not be too much, otherwise =i will be large, so that the chain drive will fail to skip teeth earlier.

After the chain works for a period of time, the wear makes the pin thinner, the sleeve and roller thinner, and the pitch of the chain is elongated under the action of tensile load f.

When the chain pitch becomes longer, the pitch D moves towards the top of the tooth when the chain winds around the sprocket. Generally, the number of chain links is even to avoid the use of adapters. In order to make the wear uniform and improve the life, the number of sprocket teeth should be co-qualitated with the number of chain links, and if the co-quality cannot be guaranteed, the common factor should be as small as possible.

Features: Advantages: No slippage.

Compact structure; The pressure on the shaft q is small.

High transmission efficiency = 98%.

It can be used in environments with high temperature and high humidity.

It can transmit long-distance transmission AMAX=8mm

Disadvantages: Can only be used for transmission between parallel shafts.

The instantaneous transmission ratio is not constant, and the transmission is not stable at high speed.

It is not suitable for application in transmissions with large load changes and rapid reversal.

There is noise and impact during transmission.

The manufacturing cost is higher than that of belt drive.

The advantages of chain drive are:

1.When the distance between the two shafts is large (the distance between the shafts is generally up to 5 6m), the transmission of the two shafts can also be realized.

2.There is no slip loss in speed, and the transmission efficiency can reach 98% 99%.

3.The transmission ratio is allowed to be larger.

4.It is suitable for multi-shaft transmission (one shaft drives several shafts) and two-way transmission, and the method is relatively simple and convenient.

5.It can transmit a large amount of power at low speeds.

6.Able to operate at higher temperatures or other harsh conditions (less affected by changes in climatic conditions).

7.There is no initial tension before transmission, and the force on the shaft and bearing is small.

8.The structure is compact, transmits the same power, and the profile size is smaller than that of the belt drive.

9.The applied chain varieties and specifications are small (the number of links can be increased or decreased at will to adjust the length), and the reserve is easy to replace.

10.The chain can be arbitrarily configured with various special links to form a variety of chain conveyors.

The disadvantages of chain drives are:

1.**Higher than belt drive, large weight.

2.The transmission ratio is not constant, the chain speed fluctuates, and it is not stable (the fewer the number of sprocket teeth, the greater the fluctuation), and it is easy to produce large tension and impact load at high speed.

3.After the chain link is elongated, the operation is unstable and easy to skip teeth.

4.The transmission is noisy.

5.Reverse operation without intermittent time is not good.

6.When the chain is broken, it is easy to damage other parts.

7.In closed drives, the design of the closure is more difficult.

8.It can only be used for transmission between parallel shafts.

Features of chain drive:

1) Compared with belt drive, there is no elastic sliding, it can maintain an accurate average transmission ratio, and the transmission efficiency is higher; The chain does not require a large tensioning force, so the load on the shaft and bearing is small; It will not slip, the transmission is reliable, the overload capacity is strong, and it can work well under low speed and heavy load;

2) Compared with gear transmission, it can have a larger center distance, which can work in high temperature environment and dusty environment, and the cost is lower;

3) The disadvantage is that the instantaneous chain speed and instantaneous transmission ratio are changing, the transmission stability is poor, there is impact and noise in the work, it is not suitable for high-speed occasions, and it is not suitable for frequent changes in the direction of rotation.

Features of chain drive:

Compared with gear transmission, it can transmit motion and power when the center of the two shafts is far apart;

Able to work under low speed, heavy load and high temperature conditions, as well as in the adverse environment of dusty soil;

Compared with belt drive, it can ensure an accurate average transmission ratio, the transmission power is larger, and the force acting on the shaft and bearing is smaller;

The transmission efficiency is high, which is generally achievable;

After the hinge of the chain is worn, the pitch becomes larger and falls off;

<> chain drive. The transmission ratio is the angular velocity of the active chain posture jujube wheel and the driven sprocket.

The ratio of the instantaneous transmission ratio changes, and the average transmission ratio is accurate.

Chain drive: It is a transmission mode that transmits the movement and power of the driving sprocket with special tooth shape to the driven sprocket with special tooth shape through the chain. Chain drive has many advantages, compared with belt drive track dismantling, no elastic sliding and slipping phenomenon, the average transmission ratio is accurate, reliable work, high efficiency; The transmission power is large, the overload capacity is strong, and the transmission size is small under the same working conditions; The required tension is small, and the pressure acting on the shaft is small; It can work in harsh environments such as high temperature, humidity, dust, and pollution.

Due to the rigid nature of the chain links, there is a polygon effect, which causes the instantaneous transmission ratio of the chain drive to change and cause additional dynamic loads and vibrations, which must be taken into account when selecting the chain drive parameters.

1. Belt drive.

Advantages: large range of center distance, stable transmission, low noise, buffer shock absorption, overload protection, simple structure, low cost, easy installation.

Disadvantages: there is sliding, the transmission ratio is not constant, the outer dimension is large, the life of the belt is short, it is not suitable for the mu source to be used in flammable and explosive occasions, and the force on the shaft and bearing is large.

2. Chain drive.

Advantages: The center distance is large, can work under harsh conditions, and has little force on the shaft and bearing.

Disadvantages: Instantaneous speed is unstable during operation, there is shock, vibration and noise, and the manufacturing accuracy is high. The life span is about 2 3 times that of the belt drive.

1. Advantages (compared with belt drive).

There is no slippage and slippage, and an accurate average gear ratio is maintained.

The transmission size is compact.

No large tension is required and the load on the shaft is small.

High efficiency. It can work in an environment with high humidity and high temperature.

2. Advantages (compared with gear transmission).

The chain drive can absorb vibration and cushion impact;

The structure is simple, the processing cost is low, and the installation accuracy requirements are low;

Suitable for transmission with large center distance;

Able to work in harsh environments.

1. Advantages (compared with belt drive).

There is no slippage and slippage, and an accurate average gear ratio is maintained.

The transmission size is compact.

No large tension is required and the load on the shaft is small.

High efficiency. It can work in an environment with high humidity and high temperature.

2. Advantages (compared with gear transmission).

The chain drive can absorb vibration and cushion impact;

The structure is simple, the processing cost is low, and the installation accuracy requirements are low;

Suitable for transmission with large center distance;

Able to work in harsh environments.