JPS58218556A - Apparatus for generating fluid vibration - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration generator that uses fluid pressure as a power source.

A vibrator with a built-in vibration generator inside the outer casing is used to compact concrete using vibrations during concrete pouring. It connects an unbalanced weight supported by a bearing to the shaft, and therefore the generated vibration frequency is limited to the maximum rotational speed of the drive motor. At high vibration frequencies, failures such as seizure often occur in the bearings, and since unbalanced weights are used, a large starting torque is required.

The present invention has been made in view of the above points, and includes a rotation generating section driven by pressurized fluid and a vibration generating section in a rotating cylinder, and the rotation of the rotating cylinder obtained by the rotation generating section; It is possible to obtain a vibration frequency higher than the rotational speed of a rotary cylinder in a vibration generating section using fluid pressure.Examples of the present invention will be described below with reference to the drawings.

The casings la and lb+1e are screwed together to form a cylindrical outer casing 1, and O-rings 2 and 3 are provided at each screwed portion for sealing. Three partition wall members 4, 5, and 6 are fixed at intervals within the outer casing 1, and the portion surrounded by the right partition wall member 4 and the center partition member 5 is used as the rotation generating section 2 and the center partition wall member 5.
The part surrounded by the left partition wall member 6 and the vibration generating part 8 is a vibration generating part 8, and a rotary cylinder 9 is pivotally supported in the center of the partition wall member 4.5.6, and is prevented from moving in the longitudinal direction by a nut 10 at the left end. The right partition wall member 4 and the left partition wall member 6 are fixed as shown in FIG.
Seal O-ring 11.12 between and rotating cylinder 9
has been established.

The rotary cylinder 9 is provided with a fluid passage 9a in its center, and a joint 13 fixed to the right partition wall member 4 is butted against the right end opening of the passage 9a, and a conduit 14 connected to the joint 13 is inserted into the rotary cylinder 9.
The fluid is sent into the rotary cylinder 90 passage 9a from the rotary cylinder 90. The rotary cylinder 9 in the rotation generator 7 is provided with a groove 9b over the entire length in the longitudinal direction, and the vane plate 15 is slidably inserted into the groove 9b. A small diameter passage 9 communicating with the passage 9a
c, and the blade plate 15 has a fluid outflow groove 15 on one side.
It forms a. Furthermore, a cylindrical fixed cylinder 16 that encloses a rotating cylinder 9 in the rotation generating section 2 is hung between the right side partition member 4 and the center partition member 5, and the lower end of the rotating cylinder 19 is connected to the rotating cylinder 19 as shown in FIG. Fixed cylinder 16
It is inscribed in and eccentrically fixed. And wing plate 1
5 has a length that allows its tip to be inscribed in the fixed cylinder 16, and the rotary cylinder 9 rotates to form the groove 9b.
When the blade reaches the contact part with the fixed cylinder 16, the blade 1
5 is designed to fit into the groove 9b.

Further, as shown in FIG. 3, a plurality of fluid discharge grooves 16a are bored in one side surface of the fixed cylinder 16.

On the other hand, in the vibration generating section 8, a through hole 9d communicating with the passage 9a is provided at a predetermined angular position on the circumference of the rotary cylinder 9, and a cylindrical fixed sleeve 17 is slidably contacted with the outer circumference of the rotary cylinder 9. The fixing sleeve 17 is fixed by being stretched between the center partition member 5 and the left partition wall member 6, and the fixing sleeve 17 has a circular hole aligned with the longitudinal position of the through hole 9d of the rotary cylinder 9. Through holes 17a are bored at intervals of 120° on the circumference. Further, a cylindrical movable cylinder 18 is provided enclosing the fixed sleeve 17, and both end surfaces of the movable cylinder 18 are in slidable contact with the central partition member 5 and the left partition member 6, and are perpendicular to the longitudinal direction. It is now possible to move in the direction (5).

Moreover, 4a+5a are fluid discharge holes bored in the right side partition member 4 and the center partition member 5, respectively.

Next, the operation of the device of the present invention will be explained. When pressurized fluid is fed into the passage 9a of the multi-rotation cylinder 9 through the conduit 14, the fluid flows into the groove 9b through the passage 9c in the rotation generating section 7, pushing up the vane plate 15 and fixing its tip. cylinder 1
6 and is injected from the outflow groove 15a of the vane plate 15 between the rotary cylinder 9' and the fixed cylinder 160, and the pressure causes the rotary cylinder 9 to rotate clockwise in FIG. Further, the side surface of the vane plate 15 opposite to the outflow groove 15a serves as a fluid discharger, and discharges the fluid forward in the rotational direction to the outside of the fixed cylinder 16 from the side discharge groove 16a of the fixed cylinder 16. The fluid is collected or discharged to the outside through the discharge hole 4a of the right partition member 4.

On the other hand, in the vibration generating part 8, the fluid exits to the outside through the through hole 9d, but since the fixed sleeve 17 is attached to the rotary cylinder 9 in circumference, /Fi) the rotary cylinder 9 rotates and its When the through hole 9d matches the position of the through hole 17a of the fixed sleeve 12, the limited fluid is injected to the outside of the fixed sleeve 17 through the through hole 17a.

Here, as shown in FIG.
When injected from Th>, the movable cylinder 18 is moved by the pressure.
When the liquid is moved downward and injected from the diagonally upper passage 17a, the movable cylinder 18 is moved diagonally upward, and vibration is generated due to the movement of the load of the movable cylinder 18. Further, the fluid injected into the movable cylinder 18 is discharged through the discharge hole 5a of the central partition member 5, and thereafter is discharged together with the fluid in the rotation generating section 7.

In this example, there is one location on the rotating cylinder 9, the fixed sleeve 1.
7 has through holes 9d in three places at 1200 intervals.

17a, three vibrations are generated per one rotation of the rotating cylinder 9, but this is due to the through hole 9d y 17a of the rotating cylinder 9 and the fixed sleeve 17.
By appropriately changing the number of , the number of vibrations relative to the rotation of the rotary cylinder 9 can be changed. For example, another example is shown in FIG. 5, and in FIG. 5(a), the rotary cylinder 9 has two through holes 9d and 17a at 180° intervals, and the fixed sleeve 17 has three through holes 9d and 17a, respectively. Fig. 5 (b) shows a rotary cylinder 9 with 12
Three through holes 9dt17a are provided at 0° intervals and two through holes 9dt17a are provided in the fixed sleeve 17 at 180° intervals, both of which can obtain twice the frequency of the previous example.

As described above, according to the present invention, a high vibration frequency can be obtained with a small number of revolutions, and the vibration frequency and excitation force can be easily increased or decreased by changes in the size, weight, or fluid pressure of the movable cylinder. be able to. Furthermore, the starting torque is reduced compared to those using unbalanced weights, and the rotational speed is lower, reducing wear on the rotating cylinder support.
If oil is used as the working fluid, there is no need to supply special oil to the support.

There are advantages such as:

4. Brief explanation of the drawing
1. FIG. 1 is a sectional side view of an embodiment of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a side view of a fixed cylinder.
4 is a sectional view taken along the line BB in FIG. 1, and FIG. 5 is a sectional view of another embodiment.

DESCRIPTION OF SYMBOLS 1... Outer casing, 4,5.6... Partition member, 7... Rotation generating part, 8... Vibration generating part, 9... Rotating cylinder, 9a... Passage, 9b...・Groove, 9C99d... Through hole, 14... Conduit, 15... Vane plate, 15a... Outflow groove, 16... Fixed cylinder, 16a... Discharge groove,
17... Fixed sleeve, 17a... Through hole, 18...
・Movable cylinder.

(9)

Claims (1)

[Claims] A rotary cylinder is pivotally supported in the center of the outer casing, a fluid passage is provided in the longitudinal direction within the rotary cylinder to supply pressurized fluid, and the rotary cylinder includes a rotation generating section and a vibration generating section. In the rotation generating part, a groove is provided in the rotary cylinder in the longitudinal direction, the bottom of the groove communicates with the passage of the rotary cylinder through a hole, and a fluid is provided on one side of the groove. A fixed cylinder in which a vane plate having an outflow groove is fitted so as to be freely retractable and a fluid discharge groove is provided on one side surface is fixed by enclosing the rotary cylinder and having a part of the rotary cylinder inscribed therein. Then, both ends of the fixed cylinder are sealed with partition members, and fluid is injected in one direction from the outflow groove while the vane plate is inscribed in the fixed cylinder by the pressure of the fluid to rotate the rotary cylinder. At the same time, in the vibration generating part,
One or more through holes communicating with the passage are provided on the circumference of the rotary cylinder at appropriate angular intervals, and a fixed sleeve is fixedly and slidably in contact with the outer circumference of the rotary cylinder. One or more through holes are provided on the circumference at appropriate angular intervals to match the longitudinal position of the through holes of the rotating cylinder, and the movable cylinder is arranged between the partition members □ at right angles to the longitudinal direction by enclosing the fixed sleeve. 1. A fluid vibration generating device characterized in that the movable cylinder is slidably supported in a direction and generates vibration by changing the movement of the movable cylinder as a fluid ejection direction changes as the rotary cylinder rotates.