SU1372203A1 - Hydraulic indicator of torque on drilling rig rotor shaft - Google Patents

Abstract

The invention relates to means of monitoring drilling parameters and allows improving the reliability of operation of the device by reducing leakage of the working fluid. On the swivel 3 0 J3 is placed a cup 14 with a seal 16. One of the walls of the cup 14 is fixed on the cap 4 of the torque converter with seal 13. Moving the torque converter 1 along the axis of the device in cavity 7 through the membrane 9 creates fluid pressure proportional to the torque on the rotor shaft 2. The pressure through the channel 6 of the swivel 3 is transferred to the pressure gauge 8. When fluid leaks from cavity 7 of the torque converter to cavity 15 of cup 14, piston 18 compacted with membrane 17 moves, creating pressure in cavity 15 that prevents outside air from flowing through seal 16. Thus, fluid leakage decreases sharply from cavity 7 to the external environment. The impact of the spring 19 through the washer 20 on the piston 18 liquid is distilled from the cup 14 back into the cavity / through the check valve 21. 1 sludge. 4 3 (O (L so you about

Description

11372203

The invention relates to the control of drilling parameters and relates to rotary torque meters.

The aim of the invention is to increase the reliability of operation by reducing the leakage of the working fluid from the cavity of the torque converter,

The drawing shows the proposed indicator.

The hydraulic indicator contains a torque converter 1, installs Mbrti and shaft 2 of the rotor of the drilling rig, a swivel 3 in the opening of the cover 4 of the torque converter with a seal 5 15 matrix 1 along the axis. In this case, the support and channel 6, which communicates the cavity 7, the hydraulic washer 10 presses the membrane 9, the cavity 7 of the torque converter and the cavity 15 of the cup are filled with a liquid, for example oil,

 An asterisk 27 is mounted on the housing of the torque converter 1, transmitting the rotation from the electric motor to the rotor shaft 2.

Hydraulic indicator works 10 next way.

When transmitting rotation from the electric motor to the rotor shaft 2 through the sprocket 27, the rollers 11, interacting with the cams 12, displace the hydrotransformer 20

thirty

rotary transformer with a pressure gauge 8, the torque converter has a membrane 9 with a support washer 10, as well as rollers 11, which are located between the cams 12, mounted on the rotor shaft 2 (not shown). On the cap 4 with the seal 13, the cup 14 is reinforced with its wall so that the swivel 3 crosses the cavity 15 of the cup and leaves it with an additional seal 16, the cavity 15 of the cup is separated from the outside by the stocking membrane 17, the central part of which includes the piston 18, movably mounted in the cup perpendicular to the axis of the swivel 3 and pressed by the spring 19 from the environment through the cargo washer 20, the cavity 15 of the cup 14 communicates with the cavity 7 of the hydrotransformer 35 of the mat through the check valve 21, the piston dimensions are designed to Centralized 22 its severity was positioned between the swivel axis 3 and the bottom 23 of the glass. The piston has a slot 24, 40 through which the swivel 3 passes. At the end of the swivel 3 there is a guide 25 which includes a stopper 26 fixedly installed relative to the cavity 7 fluid pressure proportional to the torque on the rotor shaft 2 which is transmitted through the channel 6 of the swivel 3 pressure gauge 8, indicating the value of the moment,

Due to the fact that the swivel 3, when the torque converter 1 rotates, is kept from rotation by the stopper 26, 25 ENTRYUP into the guide 25, a movable coupling takes place between the cap 4 and the swivel 3. At the same time through the seal 5 inevitable leakage of fluid from the cavity 7 of the torque converter into the cavity 15 of the glass. The amount of liquid in the glass increases, the piston 18, compacted with a membrane 17, moves away from the bottom 23 of the glass and moves along its axis. The cargo washer 20 does not interfere with the rotation of the piston, since under the action of centrifugal force it moves away from the piston, compressing the spring 19. This is provided by the ratio F

etc

M. ,, RQ.

Due to the fact that the center of 22 tons of piston tin is located between the axis of the swivel 3 and the bottom 23 of the glass, the piston 18 while rotating it along with

Mat 1 along the axis. At the same time, the thrust washer 10 presses the membrane 9, the cavity 7 of the torque converter and the cavity 15 of the cup are filled with a liquid, for example oil,

An asterisk 27 is mounted on the housing of the torque converter 1, transmitting the rotation from the electric motor to the rotor shaft 2.

The hydraulic indicator works as follows.

When transmitting rotation from the electric motor to the rotor shaft 2 through the sprocket 27 rollers 11, interacting with the cams 12, the hydrotransformer is displaced

Giving in the cavity 7 a fluid pressure proportional to the torque on the rotor shaft 2, which is transmitted through the channel 6 of the swivel 3 to the pressure gauge 8, indicating the magnitude of the moment,

Due to the fact that the swivel 3, when the torque converter 1 is rotated, is kept from rotation by the stopper 26, INCLUDING the guideway 25, there is a movable coupling between the cap 4 and the swivel 3. At the same time through the seal 5 inevitable leakage of fluid from the cavity 7 of the torque converter into the cavity 15 of the glass. The amount of liquid in the glass increases, the piston 18, compacted with a membrane 17, moves away from the bottom 23 of the glass and moves along its axis. The cargo washer 20 does not interfere with the rotation of the piston, since under the action of centrifugal force it moves away from the piston, compressing the spring 19. This is provided by the ratio F

etc

M. ,, RQ.

Due to the fact that the center of 22 tons of piston tin is located between the axis of the swivel 3 and the bottom 23 of the glass, the piston 18 while rotating it along with

but the rotor. The masses of the piston M, the cargo 45 hydrotransformer 1 tend to peshayby Msch and the force T "" of the spring pressure to displace the membrane 17 in the direction

19 in the position of its least compression of this bottom, supporting some

(when the piston is compressed by the spring to the pressure of the fluid in the cavity 15 of the beaker) are chosen taking into account the ratio

neither

q (Mp

where r

We)

 Fnp

distance of the center of gravity of the cargo washer from the axis of the swivel;

co - minimum working angle of rotation of the swivel shaft;

q is the acceleration of free fall.

55

14, This pressure is necessary to prevent air from flowing out of the external environment into cavity 15 through an additional seal 16,

At the same time, this pressure does not depend on the pressure in the cavity 7 of the torque converter and may be low, which is easily achieved by constructive execution of the piston with a small displacement of its center of gravity relative to the axis of the swivel and light in weight.

fluid pressure in the cavity 15 is

14, This pressure is necessary to prevent air from flowing out of the external environment into cavity 15 through an additional seal 16,

At the same time, this pressure does not depend on the pressure in the cavity 7 of the torque converter and may be small, which is easily achieved by constructive execution of the piston with a small displacement of its center of gravity relative to the axis of the swivel and light in weight.

The pressure in the cavity 15, thus, can be several times less than the pressure in the cavity 7. Due to this, the leakage of fluid into the external environment, i.e. through an additional seal 16, and thereby increases the reliability of the meter.

The low pressure in the cavity 15 is maintained as long as the piston 18, as this cavity is filled, moves unhindered in the direction opposite to the bottom of the sleeve. Permissible movement is limited by the distance from the center of the piston body to the axis of the swivel. The rotor operation mode, however, includes regular stops required for changing the bit. During the stop of the rotor shaft, the moment transmitted to it disappears and the pressure in cavity 7 drops to atmospheric. At the same time, the centrifugal force disappears, removing the cargo washer 20 from the piston and compressing the spring 19. At the same time, the spring presses through the washer 20 onto the piston, which, moving the diaphragm, overtakes the liquid penetrated into the cavity 15 through the seal 5, back into the cavity 7 through a check valve 21. When the piston touches the bottom of 23 cups, the entire system returns to its original state. As the rotor rotates, the piston moves again unhindered.

but maintaining the minimum pressure in the cavity 15 to the next stop, etc.

The reset is provided in any position of the torque converter after stopping, including when the cargo washer 20 is under the swivel 3. This ensures that the spring force is greater than the sum of the masses of the piston and the cargo washer q (Mn +

 -sch.

etc

Claims (1)

Invention Formula A hydraulic moment indicator on the rotor shaft of the drilling rig, containing a torque converter with a swivel mounted with a seal in its hole, through which the torque converter cavity communicates with a pressure gauge, characterized in that, in order to increase reliability by reducing leakage of the working fluid, mounted with a seal on the swivel and sealed tightly on the hydrotransformer shell a glass, as well as a piston fixed in a glass using a stocking membrane perpendicular angles to the swivel axis and the preloaded spring washer through the load, wherein the nozzle cavity communicates with the cavity through a torque converter check valve.