Product Description
Model:XW9-R7 Part-turn Manual-Operator Worm Gearbox
Introduction
Part-turn worm gearboxes used for applications such as Ball Valves, Butterfly Valves, Plug Valves, Dampers.
- The maximum out-torque is up to 100,000 Nm
- Input Flange:F16/F25
- Output Flange can be F40/F48/F60
- Max Stem Dia:220 mm
- Max height of stem:265 mm
- Comprehensive gear ratios combined with a selection of spur input- reducers
- Removable output drive sleeves
Characters
1. Totally enclosed gearing with good sealing
2. Ductile cast iron housing, reliable strength
3. Grease filled, increase the service life
4. Optional input structure, flexible input mode
5. Optional ratio of double-stage gearbox, used in a wide range
6. Adjustable angle of output end cap, flexible modes of installation
7. Optional output flange type
8. High performance of tapered roller bearing, can withstand axial and also radial forces
9. Sealed structure, good waterproof effect, can be up to IP68 if required
10. Adjustable stopper, 0 °and 90 °(±5 °adjustable)
Operating Environment
XW series part-turn worm gearbox are with good mechanical quality and steady operating performance which apply to deal with variety climate and temperature. We strive to develop XW series worm gear operator to meet higher demands.
Enclosure: IP67 standard (Optional IP68 as required)
Working Temperature: From -20ºC to 120ºC ( -4ºFto 248ºF)
Painting: Silver grey (Customization)
Connect With Valve
The flange connecting to valve is according to ENISO5210 or DIN3210 (Customization)
(XW9-R7S)
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| Step: | Double-Step |
|---|---|
| Type: | Worm Gear Box |
| Protection Level: | IP67 |
| Working Temperature: | -20 to 120 Degrees Celsius |
| Applications: | Ball Valves, Butterfly Valves, Plug Valves, Damper |
| Transport Package: | Plywood Case |
| Customization: |
Available
| Customized Request |
|---|
Calculating Gear Ratio in a Worm Reducer
The gear ratio in a worm reducer is determined by the number of teeth on the worm wheel (also known as the worm gear) and the number of threads on the worm shaft. The gear ratio formula for a worm reducer is:
Gear Ratio = Number of Teeth on Worm Wheel / Number of Threads on Worm Shaft
For example, if the worm wheel has 60 teeth and the worm shaft has a single thread, the gear ratio would be 60:1.
It’s important to note that worm reducers have an inherent self-locking property due to the angle of the worm threads. As a result, the gear ratio also affects the mechanical advantage and the system’s ability to resist backdriving.
When calculating the gear ratio, ensure that the worm reducer is properly designed and that the gear ratio aligns with the desired mechanical characteristics for your application. Additionally, consider factors such as efficiency, load capacity, and speed limitations when selecting a gear ratio for a worm reducer.
Worm Gearbox vs. Helical Gearbox: A Comparison
Worm gearboxes and helical gearboxes are two popular types of gear systems, each with its own set of advantages and disadvantages. Let’s compare them:
| Aspect | Worm Gearbox | Helical Gearbox |
| Efficiency | Lower efficiency due to sliding friction between the worm and worm wheel. | Higher efficiency due to rolling contact between helical gear teeth. |
| Torque Transmission | Excellent torque transmission and high reduction ratios achievable in a single stage. | Good torque transmission, but may require multiple stages for high reduction ratios. |
| Noise and Vibration | Generally higher noise and vibration levels due to sliding action. | Lower noise and vibration levels due to smoother rolling contact. |
| Backlash | Higher inherent backlash due to the design. | Lower backlash due to meshing of helical teeth. |
| Efficiency at Higher Speeds | Less suitable for high-speed applications due to efficiency loss. | More suitable for high-speed applications due to higher efficiency. |
| Overload Protection | Natural self-locking feature provides some overload protection. | May not have the same level of inherent overload protection. |
| Applications | Commonly used for applications requiring high reduction ratios, such as conveyor systems and heavy-duty machinery. | Widely used in various applications including automotive transmissions, industrial machinery, and more. |
Both worm and helical gearboxes have their place in engineering, and the choice between them depends on the specific requirements of the application. Worm gearboxes are preferred for applications with high reduction ratios, while helical gearboxes are chosen for their higher efficiency and smoother operation.
How Does a Worm Gearbox Compare to Other Types of Gearboxes?
Worm gearboxes offer unique advantages and characteristics that set them apart from other types of gearboxes. Here’s a comparison between worm gearboxes and some other common types:
- Helical Gearbox: Worm gearboxes have higher torque multiplication, making them suitable for heavy-load applications, while helical gearboxes are more efficient and offer smoother operation.
- Bevel Gearbox: Worm gearboxes are compact and can transmit motion at right angles, similar to bevel gearboxes, but worm gearboxes have self-locking capabilities.
- Planetary Gearbox: Worm gearboxes provide high torque output and are cost-effective for applications with high reduction ratios, whereas planetary gearboxes offer higher efficiency and can handle higher input speeds.
- Spur Gearbox: Worm gearboxes have better shock load resistance due to their sliding motion, while spur gearboxes are more efficient and suitable for lower torque applications.
- Cycloidal Gearbox: Cycloidal gearboxes have high shock load capacity and compact design, but worm gearboxes are more cost-effective and can handle higher reduction ratios.
While worm gearboxes have advantages such as high torque output, compact design, and self-locking capability, the choice between gearbox types depends on the specific requirements of the application, including torque, efficiency, speed, and space limitations.
editor by CX 2024-01-05