JPS6310845Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a vibratory drive unit that can be used primarily in vibrating sieves or vibratory conveying machines.

BACKGROUND OF THE INVENTION Vibrating screens and conveying machines are widely known and are used, for example, in the petroleum industry at oil well drilling stations. In such cases, for example, sieves are used to separate silt and swarf from the drilling fluid in order to restore the fluid to the drilling mud for reuse. However, in the vibration drive part of conventional vibrating sieves and vibrating conveyors, the rotating body loaded with an eccentric load to cause vibration is driven by a belt and pulley by a motor fixed to a stationary part of the machine. Since the belt has been used for a long time, tension and relaxation of the belt are repeated alternately due to vibrations, and in the case of a structure in which the rotating body is driven from one end of the rotating body, changes in the tension of the belt cause the rotation of the rotating body. A vibrating member connected to the vibrating member is moved diagonally, pivoting laterally about a vertical axis, and possibly tilting about a vertically horizontal axis, so that an object on the vibrating member There was a problem that the parts of the machine moved unevenly, were locally ubiquitous, and caused extreme wear on various parts of the machine.

There is a vibrating device in which a motor that drives and rotates a rotary body loaded with an eccentric load can move together with the rotary body or a vibrated member (see Japanese Patent Publication No. 17911/1983), but this device is This type of vibration device vibrates the vehicle by riding on top of the vehicle, and this type of vibrating device merely causes a jumping motion to vibrate the vehicle. Even if this is used in a vibrating sieve conveyor, the sieve member and the conveyor member will be vibrated appropriately, i.e. in an almost elliptical shape that includes elements in the vertical or vertical direction and elements in the horizontal direction, with the horizontal element being larger. It is not something that can give shape vibrations.

Therefore, the purpose of the present invention is to enable a motor that drives a rotating body loaded with an eccentric load to be connected to a vibrated member to vibrate together with the rotating body, and to prevent the vibration caused by tension and relaxation of the transmission belt as described above. It is an object of the present invention to provide a vibration drive unit which is free from problems and which is capable of imparting substantially elliptical vibrations as described above to a vibrated member.

Means for Solving the Problems The vibration drive unit according to this invention includes the following.

a Sieve frame 12 installed almost horizontally.

b. An elastic member 16 supporting the sieve frame so that the sieve frame can undergo an elliptical oscillatory movement with a vertical motion component.

c two housings 5 fixedly mounted on the outer surfaces of two opposite side walls of said sieve frame;
5,55A.

d. A rotating shaft 51 extending substantially horizontally and rotatably supported at both ends by bearings fixedly incorporated within the two housings.

e. Eccentric vertical plumbs 56, 56 disposed within the two housings and attached to the rotating shaft.
A.

f A drive motor 50 fixedly attached to the one housing and drivingly connected to the rotating shaft via a joint.

As the drive motor, a suitable hydraulic motor or an electric motor can be selected and used as appropriate.

Furthermore, examples of the sieve frame that acts as a vibrated member include a sieve member and a vibrating conveyance member.

The sieve frame includes, for example, a sieve screen. In this case, the axis of rotation would be positioned above the screen. Further, in this case, it is desirable that the sieve frame includes a tube-shaped casing surrounding the rotation shaft.

Function In the present invention, two housings that rotatably support both ends of the rotating shaft via bearings are fixedly attached to the sieve frame, and a drive motor that rotationally drives the rotating shaft is attached to the two housings. It is fixedly attached to one side of the house. The sieve frame is supported by an elastic member. Therefore, when the drive motor is started to rotate the rotating shaft, the sieve frame performs an elliptical oscillating motion that includes a vertical motion component due to the action of the eccentric weight.
The drive motor is also integrated with the sieve frame and performs the same elliptical oscillatory movement.

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings, taking as an example an apparatus used in a vibrating sieve used at an oil well drilling site.

As is well known, drilling mud circulates through the borehole during drilling and is contaminated with silt and swarf when removed from the borehole. It is desirable to be able to separate silt and swarf from the drilling fluid for reuse. Barite, or insoluble barium sulfate, is commonly added to the drilling mud to adjust the density of the drilling mud to a predetermined ratio. It is desirable to recover the barite so that it can be reused. The device shown in the drawings makes it possible to separate waste products, ie silt and cuttings, from the reusable components of the drilling mud.

The illustrated apparatus comprises a separator or sieve 10 of the vibratory type and a starting unit 11. In the center of the separator there is a sieve element, which comprises a so-called sieve basket 12, which basket is equipped with a sieve member (mesh screen) 13, which mesh screen comprises:
It has a mesh size, for example, from 6 to 600 mesh size or a combination thereof, which allows only fluid and barite particles to pass through while not allowing silt and shavings to pass through. Both side walls 1 of the above-mentioned basket 12
2A and 12A are provided by parts of first frames 55 and 55A in the vibration drive unit 14, which will be explained in detail later.

The unit 14 is activated by actuation of the activation unit 11. The drive unit 14 serves to vibrate the sieve screen 13 so that it vibrates in an oval shape as shown in FIG. 2A. The plates 12A and 12A, which are part of the first frames 55 and 55A, are respectively attached to the second frame 15 of the machine through rubber pads 16. Instead of rubber pads, it is also possible to use steel coil springs, as shown in FIG.

In FIG. 3, the so-called basket 12 has side walls 12A and opposite end walls 12B facing each other, as described above. The basket is open at the top and bottom, and the aforementioned sieve screen 13 is disposed at the bottom of the basket. As shown in FIG. 3, the screen 13 consists of two screen elements 13A, 13A, which are arranged side by side and removably clamped in place. The basket 12 is reinforced at its bottom end by spaced cross bars 12C or an open frame, in either case these members may be integrally formed with the side and end walls.

During operation, the contaminated mud water extracted from the borehole is pumped at a pressure of approximately 2.8 Kg/cm ² (approximately 40 psi) per minute.
A flow rate of 7.3 Kl (400-1600 gallons) is introduced into the two inlet pipes 20. Both of the above inlet pipes have ends 21
is closed, and the muddy water injected into the pipe 20 passes through the side pipe 22 and passes through several conical silt removers 23.
sent to. The separator 10 shown in the drawing is equipped with 16 cones. Pressurized mud water is normally introduced tangentially into the cone 23 via the tube 22 so that a swirling action is created within the container. Due to centrifugal forces, the denser components of the contaminated mud, including barite, silt and shavings, tend to move away towards the bottom of the cone 23, while the lighter components of the mud tend to flow towards the top of the cone. There is. The light component contains fluid as a main component. The liquid rising to the top of the cone 23 enters the discharge pipe 24 and is sent to the outside of the separator via one of the two discharge pipes 25. The fluid exiting said tube 25 is completely free of silt and shavings. It can be recycled into slurry and recirculated into the working borehole. Approximately 80% of the fluid content of contaminated mud water is contained in cone 2.
3, it is separated from barite, silt and shavings and reused.

The remainder of the mud, which contains approximately 10% of the original fluid, barite, silt and cuttings, drains from the bottom of the cone and is directed to an inclined tray or shute 27. The shute 27 directs the mud into the basket 12.
The sieve basket serves to direct the mud liquid and barite through the screen 13 into a collector 30 from which it is removed through one or more outlets 31 and returned to the drilling mud. Silt and cuttings remain on the screen 13 but are gradually directed by the vibrations to the downstream end 32 of the basket. As they reach end 32 they immediately fall towards a discharge outlet or chute 33 into a container (not shown) which is periodically emptied of the silt and cuttings.

It has been found that silt and shavings are more effectively directed along the screen 13 towards the downstream end 32 of the basket 12 if the downstream end of the screen 13 is made slightly higher than its upstream end. The required height difference in this case is approximately one quarter inch. The screen 13 is most conveniently tilted on rubber pad fittings or springs 16. As shown in the drawings, pads or springs 16 are attached to support plates 35 on the side walls of basket 12 and cooperating supports 36 on frame 15.
In other words, it is sandwiched between the receiving plate 35 and the support 36. A rubber damping pad or steel spring 16 connects the vibration drive unit 14 supporting the sieve screen 13 and the second
The screen 13 or basket 12 forms the only connection between the frame 15 and the second
It makes it possible to perform the elliptical motion shown in Figure A. The long axis 40 of the elliptical motion is the drive unit 14
It is oriented 90 degrees to the longitudinal direction of the rotating body, which will be described later, and is in the same direction as the main direction in which silt and shavings move on the screen. The minor axis 41 of the elliptical motion is oriented substantially vertically. As shown in the drawings, the long axis is slightly inclined relative to the horizontal position 42.

The mesh size of the screen element varies depending on the average particle size of the particles retained by the screen, but can range from 6 to 600 particles per inch.

The vibration drive unit 14 is shown in detail in FIG. The drive unit basically comprises a directly coupled hydraulic motor for driving the eccentrically loaded rotating body 51. The motor described above can freely vibrate together with the basket 12, unlike a device in which the motor is fixed to the second frame 15 or other parts, and the rotating body 51 is driven by a belt from the motor. The motor may be an electric or pneumatic motor, but the illustrated motor is a hydraulic motor. Oil under pressure is conveyed from the starting unit 11 to the motor 50 by a high pressure flexible hose 52. The starting unit 11 is a pump system driven by an electric motor 53. Since the above-mentioned equipment is sometimes used in drilling sites where flammable gases and liquids are used, such as submarine drilling equipment, measures are taken to prevent sparks from occurring in consideration of safety.

As shown in FIG. 3, the rotating body 51 has the shape of a substantially horizontal shaft, with one end 5
1A is connected to the first frame 55 on the right side in the figure through a bearing 57, and the other end 51B is connected to the bearing 5.
7A to the first frame 55A on the left side of the figure,
Each is supported. 1st frame 5 on the right
Reference numeral 5 includes a plate member 12A that also serves as one side wall of the basket 12 described above and a cylindrical casing 550 fixed thereto, and a first frame 55A on the left side includes a plate member 1 that also serves as the other side wall of the basket 12 described above.
2A and a cylindrical casing 550 fixed thereto
It is equipped with A. Both ends 51A of the rotating body 51,
51B protrudes into the cylindrical casings 550, 550A through holes in the plates 12A, 12A.
The rotating body 51 is provided above the screens 13A, 13A and below the tray 27 with a space therebetween, and substantially passes through the center of gravity of the basket.

The main parts of the rotating body 51 are housed in tube-shaped casings 120 provided on the left and right first frames. The casing has plate material 12A at both ends.
It fits into the hole and is fixed to the plate material 12A by welding. A seal 530 is arranged between the rotating body 51 and the casing 120. The motor 50 is disposed on the same line as the rotating body 51, and the drive shaft 50A of the motor is connected to the end 51 of the rotating body 51.
A, which is preferably coupled by a disk coupling 500 as shown. The motor 50 is fixed to the outer surface of the end wall 54 of the cylindrical casing 550 with bolts. The casing 550 houses the coupling 500, the eccentric weight 56, and the bearing 57 of the shaft portion 51A. The bearing is mounted in a bush 58, which is bolted to an annular plate 59 welded to plate 12A.
A lock nut 60 provided between the bearing 57 and a retaining plate 61 bolted to the bush 58 prevents the shaft 51 from displacing in the axial direction. The casing 550 has inner rings 6 spaced apart in the axial direction.
2 and an outer ring 63, ring 62 having a flange bolted to annular plate 59 and ring 63 welded to end plate 54. The rings 62, 63 are connected by a rod 64, and the gap between the two rings is filled by a removable tightening ring 65. Weight 5
6 is locked in place by a threaded pin 66 which is keyed to the rotating body 51.

On the opposite side of FIG. 3, the structure of the device is similar to that described above. That is, the cylindrical casing 550A has an annular base plate 59 on the plate material 12A.
A, and its outer end surface is closed by a wall 54A. In addition, the casing 550A is
It includes an eccentric weight 56A on the end 51B of the rotating body 51, a bearing 57A between the shaft portion 51B and the bush 58B, and a holding plate 61A. A weight 67 for balancing the weight of the motor 50 is attached to the outer end wall 54A with bolts. Preferably, the weights 56, 56A are of the same size and shape, are aligned with each other, and are both substantially fan-shaped. In order to minimize the length of the weights 56, 56A in the radial direction, both surfaces of the weights 56, 56A are stepped in the outward direction of the axis, as shown in the drawings. Each type of weight may weigh approximately 20-20Kg.

When the rotating body 51 rotates, it vibrates and performs an orbital motion, and this motion is transmitted to the bearings 57, 57A, and from there to the bushes 58, 58A and 59, 59A.
It is transmitted to the basket through. The basket 12 and screen 1
The vibration motion of No. 3 has an elliptical shape as described above.

By adjusting the speed control means provided in the starting unit 11, the speed of the motor 50 is controlled from 0 to 0.
Can be adjusted steplessly to 3000r.pm, 800 to 2000r.pm
The desired operation is performed when the motor is driven by the motor.

With the structure described above, the screen 13 can perform a very uniform oscillatory movement. This results in a fairly even distribution of silt and shavings over the surface of the screen. Fluid and barite can be separated very effectively from silt and shavings, as the local ubiquity of these substances on the screen can be avoided, and the separation machine can be continuously This effective separation can be carried out during operation.

As is clear from the above description, the weights 56, 56A do not have to be particularly fan-shaped, and may be, for example, rod-shaped objects arranged in parallel. The size and shape of the weight can be varied to adjust the amplitude of the parallel and vertical components of vibration in the screen 13.

Drive unit 14 may have an overall length of approximately 198 cm (approximately 78 inches). The rotating body 51 is a bearing 5
The length between 7 and 57A can be approximately 160 cm (63 inches) and the diameter can be 3 inches. The shaft is made of steel, and the fan-shaped weights 56 and 56A are also made of steel, and these weights weigh approximately 6.3 kg.
(14 pounds) and can be approximately 5.6 cm (approximately 2.2 inches) thick. The length of the fan-shaped surface of the above weight is approximately
14 cm (5.5 inches), and the vertical length between the center of the rotating body and the sector surface is approximately 5 cm (1.97 inches). The vertical height of the weight, i.e. the length between the lowest end shown in Figure 3 and the chord connecting the ends of the arc of the sector surface, is approximately 13 cm (5.1 inches).
It can be done. The outer circumference of the weight between both ends of the arch and around the top surface is approximately 36.8 cm.
(14.50 inches).

The present invention is not limited to the above-described embodiments, and can be modified and implemented in various ways without departing from the gist thereof.

Effects of the Invention As described above, according to the present invention, the motor that drives the rotary body loaded with an eccentric load and connected to the vibrated member can vibrate together with the rotary body. It is possible to provide a vibration drive unit that is free from various problems associated with tensioning and loosening of the transmission belt and is capable of imparting approximately elliptical vibration to the vibrated member.

[Brief explanation of the drawing]

The drawings show a vibrating sieve equipped with a device according to an embodiment of the present invention, FIG. 1 is a front view of the sieve, FIG. 2 is a side view of the sieve shown in FIG. 2A
The figure schematically shows the orbital movement that the sieve of the sieve machine performs during operation, and Figure 3 is a partially omitted sectional view of the sieve machine shown in Figure 1 with some parts omitted. be. 10 is a sieve machine, 11 is a starting unit, 12 is a sieve basket, 13 is a sieve screen, 14 is a vibration drive unit, 12A is a plate in the first frame which also serves as a side wall of the basket 12, 15 is a second frame, 16 is a rubber pad (elastic member), 23 is a cone for removing silt (cyclone separator), 27 is a chute, 50 is a drive motor, 51
is a rotating body, 51A and 51B are the ends of the rotating body, 5
5, 55A is the first frame, 550, 550A is a cylindrical casing, 56, 56A is an eccentric load, 5
7, 57A is a bearing, 67 is a weight, and 120 is a tube-shaped casing.

Claims (1)

[Claims for Utility Model Registration] A sieve frame 12 that is installed substantially horizontally; an elastic member 16 that supports the sieve frame so that the sieve frame can perform elliptical vibration motion including a vertical motion component; , two housings 55 fixedly mounted on the outer surfaces of two opposite side walls of said sieve frame;
55A; a rotating shaft 51 extending substantially horizontally and rotatably supported at both ends by bearings fixedly incorporated in the two housings; and a rotating shaft 51 disposed within the two housings. eccentric weights 56, 56A mounted on the rotating shaft; and fixedly mounted on the one housing;
A vibration drive unit comprising: a drive motor 50 drivingly connected to the rotating shaft via a joint.