Epicyclic Gear Train Holding Torque Apparatus
Product Code : EL-TOML-11029
Quick answer: The epicyclic gear train holding torque apparatus is used to study planetary gear kinematics and to measure input, holding and output torque. A motor drives the sun gear, planets on a common arm drive the output shaft, and a rope brake or holding drum measures the torques. External and internal type units are offered. Lab Exports manufactures it in Delhi for engineering colleges, polytechnics and TVET institutes.
Specifications
| Component | Specification |
|---|---|
| Configurations | External type and internal type epicyclic gear train units |
| External type | Bearing blocks with gear train, fitted with holding drum and handle |
| Internal type | Compact gear train with variable speed DC motor and rope brake for output and holding torque |
| Input | Motorised drive with sun gear on the input shaft |
| Gear arrangement | Planet gears meshing with an annular gear, carried on a common arm connected to the output shaft |
| Control panel | Digital ammeter, digital voltmeter, RPM indicator, speed controller |
| Power supply | 230 V stabilised AC |
How the holding torque experiment is done
An epicyclic or planetary gear train has at least one gear whose axis moves: the planet gears roll between the central sun gear and the outer annular gear while their carrier arm turns. Fixing different members gives different speed ratios from one compact set of gears, which is why these trains are used in automatic transmissions, hub gears and hoists.
Torque balance applies to the whole train: input torque + output torque + holding torque = 0, taking signs into account. The holding torque is the torque needed to keep the fixed member still. Students find the speed ratio from the RPM indicator, take the electrical input from the panel meters, measure the output and holding torques on the rope brake or drum, and check that the three torques balance.
- Start the motor and set the input speed with the speed controller.
- Read the input and output speeds on the RPM indicator to find the gear ratio.
- Load the output with the rope brake and note the brake load.
- Measure the torque needed on the holding drum to keep the fixed member stationary.
- Record the voltmeter and ammeter readings for input power, then repeat at other loads.
Key features
- Covers both external and internal epicyclic gear train configurations
- Motor-driven sun gear with planets on a common arm connected to the output shaft
- Measures gear ratio between input and output shafts and between input and holding drum
- Rope brake for direct measurement of output and holding torque
- Control panel with digital ammeter, digital voltmeter, RPM indicator and speed controller
- Suited to comparing input, holding and output torque
Documentation and supply
Installation instructions and a manual are supplied with the apparatus. Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the epicyclic gear train apparatus at its works in Laxmi Nagar, Delhi, and supplies it to engineering colleges, polytechnics and TVET institutes in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.
Related Theory of Machine Lab products
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The full range is in the Theory of Machine Lab section of the Engineering Lab range.
Frequently asked questions
What is holding torque in an epicyclic gear train?
It is the torque needed to keep the fixed member of the train stationary, and it balances the difference between the input and output torques.
Which configurations are available?
An external type unit with holding drum and handle, and an internal type unit with variable speed DC motor and rope brake.
What is the price of the epicyclic gear train apparatus?
Prices are not published on the website. Add the epicyclic gear train apparatus to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code EL-TOML-11029 and the quantity, to receive a quotation.
Does Lab Exports manufacture the epicyclic gear train apparatus?
Yes. Lab Exports manufactures the epicyclic gear train apparatus at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code EL-TOML-11029.
Request a quote
Email [email protected] with the house code EL-TOML-11029 and the quantity, or add the epicyclic gear train apparatus to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
