SU1635022A1 - Device for measuring parts unbalance - Google Patents

Abstract

The invention relates to a balancing technique and allows to increase the accuracy.,.-J C (I 23-1,, Ј ilS determine the imbalance of parts 1 by reducing the contact influence of the surfaces of the tested parts and the slots 5 of the rotational drive disk 4 relative to the circular cylindrical cavity 3 bodies 2 The disk 4 is mounted in the cavity 3 eccentrically in the guides 7 with the possibility of mutual displacement for changing the eccentricity value with the help of screws 8. A reference part is installed in one of the grooves 5. s parts 1 using containers 10 on the lateral surfaces of the grooves 5 are contact sensors 13 April z.p.f BACKGROUND yl 3. lS fe O s ate fO of Figure 1 w

Description

The invention relates to mechanical engineering and can be used in determining the imbalance of parts.

The purpose of the invention is to improve the accuracy of imbalance measurements by reducing the contact effect of the surfaces of the groove of a rotational drive disk with a controlled part, expanding operational capabilities by adjusting the eccentricity of the rotational drive disk and using containers to place parts.

Figure 1 shows the proposed device, a longitudinal section; figure 2 - its section aa in figure 1; Fig. 3 is a diagram explaining the principle of operation of the device.

A device for determining unbalance of parts 1 consists of a body 2 in which a cylindrical cavity 3 is formed. The rotational drive of the monitored parts 1 is made in the form of a disk 4, on the periphery of which grooves 5 are made according to the size of the monitored part 1. The disk 4 is mounted eccentrically relative to the circular cylindrical cavity 3 bodies 2. The body 2 is placed on the base 6, and the disk 4 of the rotational drive is mounted in the guides 7 with the possibility of changing the value of the eccentricity Ј using the adjusting locking screws 8. In the groove 5 is dis and the rotational drive 4, the controlled part 1 is fixed by a lock nut 9. The controlled part 1, having an external surface C. different from the surface of the rotating body, is placed in the container 10. in which the internal surface D is made counter surface C of the part 1. In a circular cylindrical cavity 3 - centered it is placed elastic ring elements 11, interacting with the test piece 1 and the sensors 12, which are located in the housing 2 on the side of the maximum gap between the circular cylindrical cavity 3 and the disk m 4. Control of decreasing contact the outer surface of the container E (or the surface of the part 1 C) with the inner surface of the groove 5 F disc 4 provided with the contact sensor 13 arranged on the surface F. Sensors 12 and 13 are connected to the processing unit 14 and the display information. In the side wall of the base 6, an air supply channel 15 is made to remove the parts to be monitored 1. Parts 1 are loaded through the inner hole 16 of the stop nut 9. To identify the imbalance of the parts to be monitored 1, a reference part is placed in one of the slots 5 of the disk A.

The device for determining the imbalance works as follows.

The locking nut 9 adjusts the working size of the circular cylindrical cavity 3 through part 1 in the upper position, into the groove 5 opposite the opening 16, is installed, the controlled part 1 in the container 10 or without it depending on its external surface C. Then the disk 4

A new part is installed in the next groove 5 in this complication, and so until all the grooves 5 are filled. In one of the slots 5 of the disk 4 a reference part can be installed to make the measurement identical. The required eccentricity value f between the axes of the cylindrical cavity 3 and the disk 4 is set with adjusting screws 8. To do this, at the initial moment the disk 4 is set concentrically

cavity 3 and unwind it to a given angular velocity w.

The signal from the contact sensors 13 located on the inner surface F of the groove 5, expose

the desired eccentricity value r., which eliminates the contact interaction of the surface E of the monitored part 1 and the inner surface F of the groove 5 of the disk 4. The controlled part 1 under the action of centrifugal forces, pressed against the surface of the elastic ring elements 11, rolls over them. The passage through the point of contact of the ring element 11 with the sensor 12, part 1 is affected by it, with

In this case there is no contact between the surfaces E and F, since the part being monitored emerges from the groove of the rotational drive disk 4. This is explained as follows.

At the initial moment of operation, the controlled part 1 is in position K, while the part 1 is completely in the groove 5 of the disk 4 and has a contact point G of the outer surface E of the container (or the outermost surface C of the part 1)

the inner surface F of the groove 5 of the disc 4. In this position, the rotation radius R of the part 1 is minimal

RMHM RK - f - E

where RK is the radius of the circular cylindrical cavity 3 of the housing 2;

g - the radius of the controlled part 1; c is the eccentricity value between the axes of the cylindrical cavity 3 and the rotational drive disk 4.

When the rotational drive disk 4 is unwinding, the controlled part 1 begins to move in the groove 5 of the disk 4 and under the action of centrifugal force, pressed against the surface of the elastic ring elements

11, run around them. The rotation radius R of part 1 is increased according to the following law:

R (RK - g J2 + е2 - 2е (R - g) cos p, where p is the angle of rotation of the groove 5 of the disk 4 with part 1

In position L, controlled part 1 has a maximum radius of rotation and the linear velocity of the center of gravity of part 1

Рmax RK - Г + Ј RG;

V0 O) X RMaKc.

In order for the part 1 to move along the cylindrical cavity 2 of the housing 3 there should be constant contact at the point G of the surfaces of the part 1 and the groove 5 of the disk 4. It is necessary that the center of gravity Oz of the part 1 all the time be moved along the maximum radius, and that the radius of rotation R and the radius RG, the distance at which contact point C is located, is reduced to RMHH. The center of gravity of the part has a maximum speed V0j w X, which is greater than the linear speed VG - about x RG, since PMax RG.

In this case, part 1 emerges from the groove 5 of the rotational drive disk 4, i.e. no contact point between surfaces E and F.

If the contact sensors 13 located on the inner surface F of the groove 5 of the disk 4 are activated at the L position, then by changing the eccentricity value to, the device can work in such a way that the E and F surfaces do not touch the L position. , by using the eccentricity of the location of the disk in the cylindrical cavity 3 of the housing 2, the mutual influence of the surfaces of the groove 5 of the disk 4 and part 1 is reduced and the error in determining the imbalance of the test piece 1 is reduced.

The amplitude of the variable component of the signal, as determined by the measuring system 14 during repeated rolling

Part 1 corresponds to the unbalance value of Part 1. After testing, Part 1 is placed against opening 16 and air supply channel 15 and applying air pressure P is removed from the device. To determine the imbalance of new parts, the cycle must be repeated.

Claims (5)

1. A device for determining the unbalance of parts, comprising a body with a cylindrical cavity, a rotational drive located therein, made in the form of a disk with grooves around the periphery, a measuring system with sensors, elastic ring elements intended for interacting with parts and sensors and mounted in a cylindrical cavity concentric to it, characterized in that, in order to improve measurement accuracy, the disk is mounted to an eccentric cylindrical cavity, and the sensors are located on the side of the maximum gap ezhdu wall of the cylindrical cavity and the disk. 2. Pop-1 device, characterized in that, in order to expand the operational capabilities, it is provided with guides, and the disk is installed in them with a possibility of radial displacement relative to the housing. 3. The device according to claims 1 and 2, characterized in that it is provided with containers placed in grooves and having a cylindrical outer surface, the inner surface of each of which is made the counter surface of the part. 4. The device is pop. 1. distinguished by the fact that it is equipped with a reference part installed in one of the grooves. 5. Pop-1 device, characterized in that it is equipped with contact sensors mounted on the side surfaces of the slots. I 1 C 11 b / / / / /