SU1509523A2 - Rotary-percussive device - Google Patents

Abstract

The invention relates to the mining industry, in particular to impact-rotating devices for breaking rocks. The goal is to increase the reliability and durability of the device by reducing vibration loads on the elements of its design. The device has an output shaft 1 for rotating the housing 4 of the percussion mechanism in the form of a spring-loaded inertial mass 6 and a hydraulic drive for returning the mass 6 in the form of pistons 8, 9 working cavities 12, 13. The stroke of the pistons 8, 9 is perpendicular to the axis of mass 6, which is spring-loaded with a supporting glass 21, mounted on the guide rod 10 with the possibility of movement along it. Steps 26, 27 of cup 21 and steps 24, 25 of rod 10 form an annular cavity 22 periodically communicated with cavity 12 of mass 6. The area of annular cavity 22 is larger than the area of inertial mass 6. When idle, the spring 5 is compressed between glass 21 and mass 6 and the cup moves in the direction of the mass, while working, it moves in the opposite direction to lower the vibration load. 1 hp f-ly, 1 ill.

Description

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his designs. The device has an output shaft 1 for rotating the housing 4 of the percussion mechanism in the form of a spring-loaded inertial mass 6 and a hydraulic drive for returning the mass 6 in the form of pistons 8, 9 working cavities 12, 13. The stroke of the pistons 8, 9 is perpendicular to the axis of the mass, which is spring-loaded a cup 21 seated on the guide rod 10 with the possibility of moving along it. Steps 26, 27 glasses 21 and steps 24,

The 25 rods 10 form an annular cavity 22 periodically communicated with the cavity 12 of the platoon of mass 6. The area of the annular cavity 22 is larger than the platoon area of the inertial mass 6. At idle, the spring 5 is compressed between the cup 21 and the mass 6 and the cup moves in the mass direction it moves in the opposite direction, reducing the vibration load. 1 hp f-ly, 1 ill.

The invention relates to mining industry, in particular to impact-rotation devices for breaking rocks, and is an improvement of the invention in accordance with the authors. St. - 1364712.

The purpose of the invention is to increase the reliability and durability of the device by reducing vibration loads on the elements of its design.

The drawing shows the device, a partial section.

The percussion-rotational device contains a rotational drive in the form of an output shaft 1, a rigidly fixed eccentric ring 2, a percussion mechanism, in the form of a spring-loaded spring 5 of inertial mass b installed in the cavity 3 of its body 4, and an impact mechanism in the form of two spring-loaded piston 7. B and 9, mounted in the housing 4 with the possibility of axial movement and the ability to interact with the eccentric ring 2. The housing 4 of the percussion mechanism is provided with a hollow stepped guide rod 10 and a plunger 11, inertial mass 6 cavity 12 platoon. Pistons 8 and 9 form with the housing 4 a pressure cavity 13, communicated through the cavity of the rod 10 with the cavity 12 of the platoon. The body 4 of the percussion mechanism is made with a volume compensator 14 and is rigidly connected to the output shaft 1 of the rotational drive, and its cavities are filled with driving medium. Pistons 8 and 9 are provided with channels 15 for periodically communicating the cavity 3 of the housing 4 with a flat cavity 13. The total area of the pistons 8 and 9 is made according to

greater than the magnitude of the working area of the cavity 12 of the platoon. Pistons 8 and 9

sealed with rubber diaphragms 16 and 17. On the inner surface of the eccentric ring 2, the ledges 18 are made .. The pistons 8 and 9 have bearings 19 and 20.

In the cavity 3 of the housing 4 a support cup 21 is installed, which is a support for the spring 5, which biases the inertial mass 6. The tank 21 has a central stepped channel (not

marked), since in the channel there is a part of the rod 10, with which it is mounted on the hollow stepped guide rod 10. The annular cavity 22 is connected with the channel by surfaces 24 and 25 of the rod 10 and surfaces of the steps 26 and 27 of the bowl 21. The cavity. 22 has the ability to periodically connect with the cavity 12 of the platoon channel 23. Hole 28 is intended for periodic communication of the channel 23 with the cavity 3.

The device works as follows.

When the output shaft 1 rotates, the housing 4 with the pistons .8 and 9 rotates. At the same time, the bearings -19 and 20 roll in the eccentric ring 2. When the ledges are 18, the pistons 8

and 9 receive an axial movement and move towards each other, pushing the volume of the driving medium from the cavity 13 into the cavity 12, while compressing the spring 7. The inertial mass 6

moving upward, compressing the spring 5.

When bearings 19 and 20 descend from ledges 18, the pressure in cavity 12 drops sharply and the inertial mass 6 moves down under the force of a compressed force.

spring 5, striking the bottom. parts of the housing 4, wherein the volume of the driving medium from the cavity 12 returns to the cavity 13 and separates the pistons 8 and 9 with the help of the spring 7. During oscillatory movement of the pistons 8 and 9, the volume of the cavity 3 of the housing 4 also changes periodically. To compensate for these changes, compensator 14 is intended.

When the pistons 8 and 9 are fully open, the channels 15 connect the cavity 3 of the housing 4 with the cavity 13, while the cavity 13 receives part of the volume of the driving medium, which is lost in the form of leaks during the cycle. Then the cycle repeats.

When moving upward, the inertial mass 6 connects the platoon cavity 12 to the annular cavity 22 by means of the channel 23 and closes the opening 28, while the cup 21 receives a displacement-downward and additionally compresses the spring 5. When the bearings 19 and 20 come off the ledges 18, the pressure in the cavity 12 of the platoon falls., glass 21

Together with the spring 5 fixed in it, it moves upwards, while the actuating medium from the cavity 22 flows into the cavity 3 through the leakages of the mating surfaces -24 and. 25 rods and glasses. 21, as well as through the hole

28. When moving the glass 21 upward force that acts on Kor1509523

The trigger 4 of the impact mechanism, and on the output shaft 1 of the drive and causes the vibration of the whole mechanism, is reduced. The shaft of the annular cavity 22 is larger than the area of the platoon cavity 12, since the pressure in the cavity 22 is somewhat less than the pressure in the platoon cavity 12 by the amount of flow resistance of the channel 23.

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Claims (2)

1. A shock-rotary device according to autor. St. No. 1364712, characterized in that, in order to increase the reliability and durability of the device by reducing vibration loads on the elements of its design, the device is equipped with a supporting stepped cup, connected by means of a spring with an inertial mass, with a stepped channel in the glass and the cup is placed on the guide rod so that it can move along the rod, with the cup steps forming with the guide rod an annular cavity, which is periodically hydraulically connected to the inertial mass platoon. 2. Device by. Clause 1, on tl l., which is because the area of the annular platform is larger than the area of the inertial mass platoon.