SU984829A1 - In rounding vane tip edges - Google Patents

Description

(St) INSTALLATION FOR ROUNDING THE SHUTTERS OF THE PEN OF BLADES

one

This invention relates to the surface treatment of gas turbine blades and can be used in the machine-building and instrument-making industries.

There are installations that contain a working chamber, a spindle, inside of which there is a transmission shaft, which is kinematically connected with the parts being processed and its rotation drive 1.

The main disadvantage of the known installations is that the blades during their processing orient without taking into account the change in the value of the radius of the rounding along the edges being machined, and this does not allow the mechanical rounding of the edges of a variable radius to obtain the required geometry.

The purpose of the invention is to improve the performance of blade edge processing.

This goal is achieved by the fact that the installation is equipped with an additional hollow shaft mounted between the transmission shaft and the inner surface of the spindle and kinematically connected to the transmission shaft, and at the ends of said shafts the conical casings in contact with the conical grooves and L-shaped are installed coaxially lugs installed in pairs and connecting their edges of the grooves of the outer and inner covers. 5 FIG. 1 shows the proposed device; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a view B in FIG. one.

The blades 1 and 2 in the process of processing interact with the edges of the abrasive 3,

10 is located in the working chamber 4 in the fluidized state. In the chamber 4, the spindle 7 is mounted for rotation around the GI axis on the ball bearings 5 mounted in the housing 6, in the fixture 8 of which the mentioned blades are fixed. The spindle body 6 is mounted on a damper 9 which is in contact with the body of the working chamber 4 and is movable in a vertical direction. Vertical spindle offset 7

Claims (1)

2Q is carried out by means of a drive 10 and a screw mechanism 11. The mass of the spindle 7 is partially balanced by a load (not shown), which interacts with the body 6 by means of a cable 12: On the base 13 of the blade A, a porous partition 14 is made of felt. The spindle 7 is driven in rotation from the reversing engine 15 via a gearbox 16, on the output shaft of which a pulley 17 is mounted with a driving belt 18 spanning the driven jaw 19, which is fixed on the spindle 7. Inside the spindle 7, the transmission shaft 20 is mounted, which is kinematically connected to the drive its turning. The drive is made in the form of a pneumatic cylinder 21, the brush 22 of which interacts with one of the arms of the rocker arm 23 mounted on the axis 24 with the possibility of rotation. On the other shoulder of the rocker arm 23, a ball bearing 25 is installed, with which the rod 26 interacts, which is installed in the bore of the transmission shaft 20. The rod 26 is pressed against the ball support 25 by means of a spring 27, also installed in the bore of the transmission shaft 20. The device also contains an air preparation system 28, a control panel 29 and a cover 30 mounted on the housing of the working chamber 4. Between the transmission shaft 20 and the inner surface. Spindle 7 coaxially with them is mounted a hollow shaft 31, kinematically connected with the transmission shaft 20, and at the ends of the said shafts, there are coaxial housings 32 and 33 which are in contact with each other, having grooves 34 and 35 on the conical surfaces, the edges of which interact with the flap sections B and C of the blades ’blades the surfaces of the housings 32 and 33, respectively, at the edge of the grooves 34 of the outer casing 32 and at the edge of the grooves 35 of the inner casing 33, L-shaped stops 36 are fixed opposite each other for fixing the blades. The kinematic connection of the transmission shaft 20 and the hollow shaft 31 is accomplished by the fact that on the outer surface of the hollow shaft 31 there is a screw groove 37, with which a pin 38 interacts, which is installed in the groove 39, made in the transmission shaft 20. Blades 1 and 2, depending on the ratios of the maximum and minimum radii of rounding their edges are pre-oriented at an angle to the axis of rotation, secured in the fixture 8 of the spindle 7. Then, following a command from the control panel 29, under the influence of the actuator 21, a relative Tel'nykh rotation conical housings 32 and 33, the edges of the slots 34 and 35 which, interacting with the marginal uchast1 s pen is separated from the rest of their profile pen nepodvergayuscheys abrasion. The stops 36 are fixed with the profile of the pen in a predetermined position. The cover 30 is closed by sealing the working chamber 4, in which the abrasive 3 is then transferred to a fluidized state by supplying compressed air through the cavity A and the porous partition 14. The spindle 7 from position D is moved to the operating position E, from the control panel 29 a command is sent to the actuator 10, which, through the screw mechanism 11, displaces the spindle 7 in the direction of the fluidized bed by an amount N. After this, the reverse rotation in the fluidized bed is given at a predetermined rotational speed and processing cycle of the spindle 7 abrasive, as a result of which the edge and near-edge areas of the feather profile are subjected to abrasive action with different intensities depending on the floor of the peripheral speed along the edges being processed. . Edges round around a wide range of rounding radii along them. At the end of a predetermined processing cycle, the rotation of the spinner 7 is stopped and it is again transferred to position D, in which the abrasive 3 is transferred to an unliqueted state. Blades I and 2 are replaced. The processing cycle is repeated. Thus, the proposed installation allows mechanized rounding of the edges in a wide range of variation of the rounding radius along them with high productivity and quality of processing. The economic effect is 15-25 thousand rubles. per year per device. An apparatus for rounding off the edges of a blade blade, comprising a working chamber, a spindle inside which a transmission shaft is located, kinematically connected to a rotational drive thereof, characterized in that, in order to reduce the edge processing performance of the blades, it is provided with an additional hollow shaft mounted between transmission shaft and the inner surface of the spindle and kinematically connected with the transmission shaft, and at the ends of these shafts coaxially mounted introduced into the installation contacting between a conical casings with tapered slots and L-shaped abutments mounted in pairs and connecting the edges of the grooves of the outer and inner casings. Sources of information taken into account in the examination 1. USSR author's certificate in application No. 2895102 / 25-08, cl. Si / OO.-JS of Fig .1