Belt Drive Screw Air Compressors EAS

EAS Belt-driven Air Compressor

Jaguar EAS series are economical belt-driven screw air compressors with power ranging from 7.5kW to 55kW. Equipped with screw airends, they deliver large air displacement and stable transmission. Fitted with German imported belts for outstanding durability. The compact unit structure allows air pressure adjustment by simply replacing pulleys, cutting maintenance costs significantly. Featuring high-efficiency asynchronous motors and imported filter consumables, the compressors excel in heat dissipation and noise reduction, ideal for small and medium-sized factories in machinery, textile, photovoltaic, automotive and other industries.

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What are Advantages of Belt Drive Screw Air Compressors

Economy

The belt drive is a simple and afordable solution. Maintenance is simple, with oil and fiter changes needed every 500 to 1,000 hours of regularuse

Durability

The belt drive has excelent shock absorption and vbration dampening. It can also protect your air compressor from experiencing an overioadwhen the belt slips over a pulley.

Quieter

Belt-driven models, which are quieter, are generally better for environments in which noise emissions have to be kept low, e.. in indoorenvironments or residential neighborhoods.

What type of Belt Drive Screw Air Compressors

01.Open Belt Drive

This is the simplest type of belt drive where two or more pulleys are connected with a belt wrapped around them. When power is supplied to the driving shaft, it rotates the driving pulley. The belt moves with it and rotates one or more driven pulleys.
In an open belt drive, both pulleys rotate in the same direction. With a horizontal pulley arrangement, the tight side of the belt is at the bottom and the slack side is at the top to increase the belt's angle of contact with the pulleys.

02.Cross Belt Drive

This type of drive is used when two pulleys need to rotate in opposite directions or require a greater wrap angle for power transfer. In a crossed belt drive (aka twisted or closed belt drive), after passing over the top of the driven pulley, the belt contacts the driving pulley from the bottom. Thus, the belt's shape resembles the number 8.Between the two pulleys, the belt comes in contact with itself and the rubbing causes the belt to wear off. This can be mitigated by placing pulleys at the maximum allowed distance and running the system at slow speeds.The crossed belt drive can transfer greater power for the same pulley dimensions and centre distance as the contact angle is higher. However, a longer belt is required as is evident by its crossed positioning.

03.Stepped Cone Pulley

This type of belt drive uses a driven pulley with multiple diameters. As the pulley resembles a stepped cone, it is known as a stepped cone pulley drive.This drive is used when the driven shaft needs to be rotated at different speeds. Speed of the driven shaft can be increased or decreased by shifting the belt to a smaller or larger diameter step on the pulley respectively.Common applications for this type of drive are lathes and drilling machines. A stepped cone pulley enables to use the same drive motor to obtain different output speeds.

04.Fast and Loose Cone Pulley

As the name suggests, this drive consists of two pulleys – one fast and the other loose. Both of these pulleys are mounted on the driven shaft.The fast pulley is keyed to the driven shaft so it rotates at the same speed as the shaft. The loose pulley is mounted without a key so it rotates freely relative to the shaft. This pulley is incapable of power transmission.To hold the loose pulley in its place, a gun-metal or cast-iron bushing with a collar on one end is used. This prevents any axial movement. The diameter of the loose pulley is smaller than the fast pulley's to allow the belt some slack.This drive permits the immediate start and stop of the driven shaft without changing the speed of the driving shaft. When power needs to be transferred, the belt is shifted from the loose pulley to the fast pulley and when it needs to be stopped, the belt shifts back to the loose pulley.Fast and loose cone pulley drives find use in applications where one line shaft powers multiple driven shafts. Switching to the loose pulley stops power transmission without having to stop the driving shaft which may be powering other shafts at the same time.

05.Jockey Pulley Drive

The dimensions of the smaller pulley decide the maximum force that the belt drive system can transmit. But what if both pulleys are small? Smaller pulleys lead to a smaller contact area between the belt surface and the pulley. If the pulley diameter is too small for meaningful contact with the belt's surface, the power transmission capacity reduces.Alternately, if the pulleys are required to be really close to each other, the wrap angle around the smaller pulley is reduced. This limits its power transmission capacity.The solution for the aforementioned cases is to use a jockey wheel or an idler pulley. In mechanical systems, a jockey wheel refers to a machine element that steers or guides another element.The idler pulley is placed on the slack side of the belt. They improve the belt drive's performance as they reduce vibration by supporting the belt.Idler pulleys can increase the wrap angle for smaller pulleys, ultimately increasing the surface area between the drive belt and the pulley.

06.Quarter Turn Belt Drive

Most belt drives can only work with parallel shafts. But this may not always be the case. In situations where rotating shafts are at the right angles, we can use quarter turn belt drives.Quarter turn belt drives (aka right angle belt drives) have a belt that goes around two perpendicular shafts after making a quarter turn. For the belt to stay in place, the pulley's width must be at least 40% wider than the belt's cross-section.In some cases, guides or idler pulleys are used to promote better belt tracking and prevent slip off.

07.Compound belt drive

A common application for belt drives is to reduce shaft speed. This is part of the reason why most belt drives transfer motion from a smaller pulley to a larger pulley. But sometimes the speed ratio achieved from one set of pulleys may not be enough. In such cases, the designers can opt for compound belt drives as they allow for have higher speed ratios to be achieved.A compound belt drive consists of more than two shafts with multiple pulleys keyed to at least one of the shafts. The driving pulley transfers power from one shaft to another through multiple shafts.

Equipment and Workspace Setup Safety Tips

The way your equipment and workspace are set up can have a significant impact on safety. Some air compressor and workspace setup tips to keep in mind include:

01/

Component Pressure Ratings:

Make sure that all components, including hoses, pipes and fittings, are rated for the maximum pressure of the air compressor.

02/

Relief Valves:

Relief valves automatically release air if the pressure in the tank gets too high. These valves are important air compressor tank safety features, so you should never attempt to adjust, bypass or remove them.

03/

Drain Valves:

If your compressor has an electric drain valve, make sure it is at least a foot and a half above the ground. Electric drain valves must be kept away from moisture.
Shutoff valve: The shutoff valve should always be visible and within reach when working with compressed air.

04/

Guards for Moving Parts:

Ensure that all moving parts, such as flywheels, belts and pulleys, are effectively guarded.

05/

Workspace Air Circulation:

Intake air contains pollutants and carbon monoxide that can be hazardous to your health. For these reasons and others, it's essential to keep your workspace circulated with clean air at all times.

06/

Workspace Humidity:

It's important to keep the humidity in your workspace from getting too high. To decrease the moisture in the air, try increasing air circulation in the workspace, operating your compressor for longer periods, using a peripheral crankcase heater or adding a dryer to your compressed air system.

Five Steps to Maintain Air Compressor Belt

Tip 1: Remove Belt Guard
The belt guard is for safety and it is important that the belt guard is always functional so that the compressor is safely fastened. It is kept in place by screws and snaps, so carefully remove the belt guard by twisting and separating pressure snaps.Store the screws safely, so that it can be reattached once the cleaning is done.

Tip 2: Inspect Belt
You are supposed to visually check for any breaks or fraying for the belt. If you see any signs of breakage or fraying, take immediate action.If the belt is damaged, replace it and if not, move to step 4.

Tip 3: Remove & Replace Belt
Loosen the four bolts and hold the motor in place and then shift the motor towards the pump. It should be loose enough so that it can be easily removed.Now move the motor back to its position so that proper belt tension is created and then tighten the motor bolts. Finally, replace the belts.

Tip 4: Align the Belt
Start by laying the straightedge against flywheel touching and adjust the motor pulley so that the belt is parallel to the straightedge.Now use a gear puller so that the pulley is on the motor shaft, tightening the setscrew after positioning the pulley.Adjust the motor distance by adjusting motor position. Repeat if needed by testing tension.

Tip 5: Reattach the Belt Guard
Place the belt guard back on the unit. Either snap pressure will snap back or replace the screws and tighten.Please note that air compressors produce tons of vibration which can result in the screws loosening up.These are some of the easy steps to ensure that your belt guard is operational at all times. Since the belt is covered, there is a high chance that you will miss out on the maintenance part.

Frequently Asked Questions

Q: What is the core working principle of belt-driven air compressors?

A: The motor transmits power to the host pulley through a triangular belt to drive the compression operation of the cylinder piston.

Q: What advantages does belt transmission bring to air compressors?

A: It can absorb vibration effectively, reduce impact load and lower the overall operating noise of the unit.

Q: How to adjust the tightness of the compressor belt correctly?

A: Move the motor position to fine-tune tension; the belt shall have slight elasticity when pressed by hand.

Q: Why does the belt slip during long-time operation?

A: Excessive wear, insufficient tightness or dust accumulation on the pulley surface will cause belt slipping.

Q: What is the main difference between belt-type and direct-drive air compressors?

A: Belt models are cheaper and easier to maintain, while direct-drive ones feature higher transmission efficiency.

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