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Improving the design and parameters of the drive of the shut-off valves

UDK: 621. 646
DOI: 10.24887/0028-2448-2019-4-110-112
Key words: mechanism for overlapping pipeline, planetary gear, strength
Authors: F.I. Plekhanov (Kalashnikov Izhevsk State Technical University, RF, Izhevsk), V.P. Grahov (Kalashnikov Izhevsk State Technical University, RF, Izhevsk)

Planetary gears are used in many machines and mechanisms, including mechanism for overlapping pipeline, due to their high efficiency and good mass-size indicators. Existing two-speed manual valve actuators comprising speed switches made in the form of a link mechanism or rigidly connected to the sun gear of a polyhedron and the corresponding adapter are difficult to manufacture, non-technological or of large axial dimensions. The design of the two-speed manual drive of the shut-off pipeline armature developed at Izhevsk State Technical University is devoid of these drawbacks. In it, the speed switch is made in the form of a flange rigidly connected to the drive pulley.

An important indicator of the strength of the planetary gear planet and drive assembly as a whole is the load distribution unevenness coefficient in the coupling zone of the satellite axis and the cheek of the carrier, on which the magnitude of the normal contact stresses in the specified zone depends. When studying the stress-strain state of the satellite axis, the latter in the zone of its interface with the cheek's cheek is considered as a beam on an elastic base. The solution of the differential equation of the curved axis made it possible to determine the dependence of the load distribution non-uniformity over the thickness of the driver's cheek and to select the rational parameters of the drive.

References

1. Patent no. 2413114 RF, Manual two-speed drive for multi-purpose accessories, Inventors: Chernov A.V., Chernov P.A., Rotermel' P.V., Luk'janchenko N.A.

2. Plekhanov F.I., Tonkikh A.S., Vychuzhanina E.F., Planetary gear rigs: design features and technical-economic indicators (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2015, no. 6, pp. 44–46.

3. Patent no. 2567973 RF, Toothed planetary gear, Inventors: Plekhanov F.I., Senyutkin P.A., Plekhanov A.D.

4. Plekhanov F., Goldfarb V.I., Rational designs of planetary transmissions, geometry of gearing and strength parameters, In: Theory and Practice of Gearing and Transmissions, Part of the Mechanisms and Machine Science book series, Springer International Publishing Switzerland, 2016, V. 34, pp. 285–300.

5. Plekhanov F.I., Suntsov A.S., The influence of stiffness of the planet shafts and bearings on load distribution among the planets in a planetary gear (In Russ.), Izvestiya vuzov. Mashinostroenie, 2016, no. 3, pp. 10-16.

6. Akhmetzyanov M.KH., Lazarev I.B., Soprotivlenie materialov (Strength of materials), Moscow: YURAYT Publ., 2011, 299 p.

7. Kudryavtsev V.N., Kirdyashev YU.N., Ginzburg E.G., Planetarnye peredachi (Planetary gears), Leningrad: Mashinostroenie, 1977, 563 p.

8. Plekhanov F.I., Grakhov V.P., Suntsov A.S., Planetary gear transmissions of build and travelling machines: rational design, cost and performance data (In Russ.), Mekhanizatsiya stroitelК№stva, 2016, no. 4, pp. 22–25.

Planetary gears are used in many machines and mechanisms, including mechanism for overlapping pipeline, due to their high efficiency and good mass-size indicators. Existing two-speed manual valve actuators comprising speed switches made in the form of a link mechanism or rigidly connected to the sun gear of a polyhedron and the corresponding adapter are difficult to manufacture, non-technological or of large axial dimensions. The design of the two-speed manual drive of the shut-off pipeline armature developed at Izhevsk State Technical University is devoid of these drawbacks. In it, the speed switch is made in the form of a flange rigidly connected to the drive pulley.

An important indicator of the strength of the planetary gear planet and drive assembly as a whole is the load distribution unevenness coefficient in the coupling zone of the satellite axis and the cheek of the carrier, on which the magnitude of the normal contact stresses in the specified zone depends. When studying the stress-strain state of the satellite axis, the latter in the zone of its interface with the cheek's cheek is considered as a beam on an elastic base. The solution of the differential equation of the curved axis made it possible to determine the dependence of the load distribution non-uniformity over the thickness of the driver's cheek and to select the rational parameters of the drive.

References

1. Patent no. 2413114 RF, Manual two-speed drive for multi-purpose accessories, Inventors: Chernov A.V., Chernov P.A., Rotermel' P.V., Luk'janchenko N.A.

2. Plekhanov F.I., Tonkikh A.S., Vychuzhanina E.F., Planetary gear rigs: design features and technical-economic indicators (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2015, no. 6, pp. 44–46.

3. Patent no. 2567973 RF, Toothed planetary gear, Inventors: Plekhanov F.I., Senyutkin P.A., Plekhanov A.D.

4. Plekhanov F., Goldfarb V.I., Rational designs of planetary transmissions, geometry of gearing and strength parameters, In: Theory and Practice of Gearing and Transmissions, Part of the Mechanisms and Machine Science book series, Springer International Publishing Switzerland, 2016, V. 34, pp. 285–300.

5. Plekhanov F.I., Suntsov A.S., The influence of stiffness of the planet shafts and bearings on load distribution among the planets in a planetary gear (In Russ.), Izvestiya vuzov. Mashinostroenie, 2016, no. 3, pp. 10-16.

6. Akhmetzyanov M.KH., Lazarev I.B., Soprotivlenie materialov (Strength of materials), Moscow: YURAYT Publ., 2011, 299 p.

7. Kudryavtsev V.N., Kirdyashev YU.N., Ginzburg E.G., Planetarnye peredachi (Planetary gears), Leningrad: Mashinostroenie, 1977, 563 p.

8. Plekhanov F.I., Grakhov V.P., Suntsov A.S., Planetary gear transmissions of build and travelling machines: rational design, cost and performance data (In Russ.), Mekhanizatsiya stroitelК№stva, 2016, no. 4, pp. 22–25.


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