RU159016U1 - PRESS FOR EXTRACTION OF LIQUID FROM VEGETABLE RAW MATERIALS - Google Patents

Abstract

A press for squeezing liquid from plant materials, comprising a screw feeder with a drive, a grain chamber and a screw squeezing shaft located in it, characterized in that the screw feeder drive is made with a drive shaft rigidly connected to it by a housing containing a pair of angular contact bearings, and a driven shaft located coaxially with the drive shaft, wherein the inner race of one of the angular contact bearings of the pair is fixedly mounted on the driven shaft, and the inner race of the second angular contact bearing is mounted on said driven shaft with the possibility of axial movement without rotation relative to the driven shaft by means of an adjusting nut.

Description

The utility model relates to special-purpose presses, in particular, to screw devices for squeezing liquids from plant materials, juice, and oil.

Known screw press for squeezing liquid from plant materials (Patent RU No. 2271278 of 03/10/2006), containing a sieve, a screw drive shaft located inside the sieve and a pressure control mechanism in which the screw drive shaft is made in the form of a trapezoidal spring, the latter the coil of the spring is made in the form of a cone coaxially installed in the press pressure control mechanism with the taper direction inside the zeera, ensuring that the press is not jammed.

A disadvantage of the known press is the regulation of the spin process only in the output part of the grain chamber.

A press for squeezing oil from seeds with a screw mechanism (patent No. 1807944, IPC 5 B30B 9/14, publ. 07.04.93), also comprising a housing with a feeder in the form of a screw, a grain chamber and a screw mechanism located in it, is also known. in the form of a shaft with a set of smooth bushings and bushings with turns. The dimensions of the bushings with turns: the outer diameter, the height of the turn, its pitch and the length of the bushings are made according to a certain mathematical dependence.

Its disadvantage is the non-optimality of the spin parameters when the density of the raw material entering the feeder changes.

The pulp is not uniform in composition in some places, it is less dense, in others it is more dense. If the pulp entering the grain chamber wakes up to a low density (insufficiently compressed), then at the exit from the chambers the pulp entering the grain chamber wakes up to a low density (insufficiently compressed), as a result, there will be an increased content of residual oil in the cake. If the pulp entering the grain chamber wakes up to have a higher density (too compressed), then the mass will jam in the grain chamber, which leads to breakage of the press parts. It is necessary that the pulp entering the grain chamber has the same density, for which the feeder shaft must change the speed of rotation - at low density the shaft must rotate faster, at high density slower, while the torque on the feeder shaft must remain constant.

The problem to be solved by the alleged invention is aimed at increasing oil recovery by a press at different pulp densities.

The technical result is an increase in the yield of oil from raw materials.

To achieve this result, in a press for squeezing liquid from plant materials containing a housing with a screw feeder, a grain chamber and a screw squeeze shaft disposed therein, according to the invention, the screw feeder drive is provided with a housing rigidly connected to the drive shaft and containing at least a pair of radially thrust bearings, and a driven shaft located coaxially to the leading one, while the inner race of one of the bearings is fixedly mounted on the driven shaft, the second bearing is mounted on the same shaft with the possible Stu axial movement without rotation relative to the driven shaft, by means of, for example, adjusting nut.

The invention is illustrated in the drawing, where in FIG. 1 shows a structural-technological diagram of the press.

The device contains a slave 1 leading 3 drive shafts of the feeder 4 with a feeding screw 10, a sow 9 with a screw shaft 5. The drive shaft 3 is rigidly connected to the housing 6, in which a pair of angular contact bearings with internal bearings 6 and 8. are installed. Internal sleeve 6 the bearing is fixedly mounted on the driven shaft 1. The inner race 8 of the second bearing is mounted on the same shaft 1 with the possibility of axial movement without rotation relative to the output shaft 1, for example, by means of the adjusting nut 2. Sets the adjusting nut 2 The value of the required maximum torque corresponding to the highest density of the pulp.

The work of the press is as follows.

The pulp along the inclined chute enters the feeder 4. The frequency of the drive shaft 3 of the drive of the feeder 4 is set higher than necessary for the drive to operate at the lowest density of the incoming pulp. In the absence of load on the driven shaft 1, drive 3 and driven 1 shafts will rotate at the same speed. In the case of mass flow into the feeder 4, the rotation speed of the driven and driving shafts will be the same until the moment on the driven shaft 1 reaches the maximum value and in the future the moment will remain constant. The amount of transmitted torque is determined by the dependence

M _cr = 2P _OS · R · f _T ,

where M _cr - transmitted torque, N · m;

P _OS - the force on the bearings, created due to their adjustable axial tightened nut 2, N;

R is the distance from the axis of the drive shaft to the axis of the rolling elements of the bearings, m;

f _t - coefficient of friction in bearings.

In the case of a stop of the screw shaft 5 of the press, the drive shaft 3 will rotate at the same speed, and the driven shaft 1 will stop.

Thus, due to the fact that the drive of the screw feeder is equipped with a housing rigidly connected to the drive shaft, containing at least a pair of angular contact bearings, and a driven shaft located coaxially to the drive shaft, wherein the inner race of one of the bearings is fixedly mounted on the driven shaft, the second bearing - mounted on the same shaft with the possibility of axial movement, without rotation relative to the driven shaft, provides increased oil recovery by the press at different pulp density, due to the fact that with an increase in and pulp density, the rotational speed of the driven shaft 1 will decrease, and when the pulp density decreases, the rotational speed of the shaft will increase with constant torque.

Claims (1)

A press for squeezing liquid from plant materials, comprising a screw feeder with a drive, a grain chamber and a screw squeezing shaft located in it, characterized in that the screw feeder drive is made with a drive shaft rigidly connected to it by a housing containing a pair of angular contact bearings, and the driven shaft located coaxially with the drive shaft, while the inner race of one of the angular contact bearings of the pair is fixedly mounted on the driven shaft, and the inner race of the second angular contact bearing is mounted on said driven shaft with the possibility of axial movement without rotation relative to the driven shaft by means of an adjusting nut.

Images