RU2348915C2 - Device for trial of centrifugal dairy pump driving wheel blades - Google Patents

Abstract

FIELD: physics, trials.

SUBSTANCE: invention concerns field of mechanisation of animal industries, in particular to devices for trial of dairy pumps. The device contains the shovels mounted between conducting and conducted disks. The leading disk has the interior hole equal of 0.1 outside radiuses of the disk. The device is supplied by three racks, one end faces attached perpendicularly to a leading disk through everyone 120° on a circle arc, radius 0.3 from the same radius of the disk, with centre in an intersection point of an axis of the device with a plane of the leading disk. Other end faces of racks are attached to a plug end face on which screw a conducted disk with a lock nut. On a surface of disks between which fix blades, notches under a corner 90° to each other are superimposed. The invention is guided on determination of optimum design data of blades of the driving wheel of the centrifugal dairy pump by the method of practical trials.

EFFECT: determination of optimum design data of blades of the driving wheel of the centrifugal dairy pump by the method of practical trials.

2 cl, 2 dwg

Description

The invention relates to the field of mechanization of animal husbandry, in particular to devices for testing milk pumps.

Known impeller of a centrifugal pump containing blades mounted between the master and driven drives (SU 1105696 A, 07/30/1984).

The disadvantage of this impeller is the inability to change the installation angles of the blades and their curvature for testing milk pumps.

The objective of the invention is the determination of the optimal design parameters of the impeller blades of a centrifugal milk pump using practical tests.

The technical result is achieved due to the fact that in the device for testing the impeller blades of a centrifugal milk pump, containing the blades mounted between the master and the driven discs, according to the invention in a perpendicular position to the master disc with an inner hole equal to 0.1 of the outer radius of the disc, one three racks are attached to the ends, every 120 ° on an arc of a circle, with a radius of 0.3 from the same disk radius, centered at the point of intersection of the device axis with the plane of the drive disk, the other ends of the racks attached to the end face of the sleeve, with a driven disk screwed onto it.

A lock nut may be screwed onto the sleeve, and on the surface of the disks between which the blades are fixed, notches are made at an angle of 90 ° to each other.

Figure 1 shows a device for testing the impeller blades of a centrifugal milk pump, a longitudinal section.

Figure 2 is the same, a top view of figure 1.

A device for testing the impeller blades of a centrifugal milk pump consists of a drive disk 1, and for mounting the device on the motor shaft in the disk, a hole with a radius of R ₁ equal to 0.1 of the outer radius R of disk 1 is made with a bevel that prevents the disk from turning on the shaft. In the perpendicular position, the ends of the three posts 2 are attached to the drive disk 1, the attachment points of the posts 2 are located on a circle with a radius R _{2 of} 0.3 from the same radius R of the disk 1, centered at the intersection of the axis of the device with the plane of the drive disk 1, every 120 °. The length of the uprights L is equal to the height of the test blades and is 0.25R. An end face of the sleeve 3 is attached to the other ends of the uprights 2 with an inner diameter D of 0.27R. A driven disk 4 is screwed onto the sleeve 3, with an external radius equal to the radius R of the driving disk 1, all the way into the end surfaces of the blades, which are installed between the leading and driven drives 1, 4.

To keep the blades between the disks 1, 4 during pump operation on the surfaces of the disks 1, 4, which are in contact with the ends of the blades, notches are made at an angle of 90 ° to each other. Additionally, the impeller blades are fixed in a stationary state between the disks 1, 4 with a lock nut 5, which is screwed onto the sleeve 3.

A certain number of blades of the same shape are installed on the drive disk 1, and they can withstand strictly defined installation angles and the pitch of the blades. A driven disk 4 is screwed onto the sleeve 3 until it contacts the end faces of the blades. The locking nut 5 fixes the blades between the disks 1 and 4. In the working chamber of the milk pump, a device for testing the impeller of the impeller of the centrifugal milk pump is installed, which is fixed on the motor shaft. The pump housing is covered with a cover. They start the pump and test the impeller with the blades of the selected profile. After testing, determine the change in the quality indicators of milk and assess the optimal location of the impeller blades. Open the lid of the milk pump housing and remove the device for testing the impeller blades of the centrifugal milk pump. Install the blades of a different profile and repeat the tests until optimal design parameters of the impeller blades are obtained.

Claims (2)

1. A device for testing the impeller blades of a centrifugal milk pump, containing blades mounted between the leading and driven disks, characterized in that in a perpendicular position to the leading disk with an internal hole equal to 0.1 of the outer radius of the disk, three racks are attached at one end through every 120 ° on an arc of a circle with a radius of 0.3 from the same radius of the disk, centered at the point of intersection of the axis of the device with the plane of the drive disk, the other ends of the racks attached to the end of the sleeve, screwed on it by direct drive. 2. The device according to claim 1, characterized in that a lock nut is screwed onto the sleeve, and on the surface of the disks between which the blades are fixed, notches are made at an angle of 90 ° to each other.

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