JPS6010196B2 - Bearing lubricator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an axial flow or mixed flow type movable vane pump, and particularly to a bearing lubrication device for the movable vane shaft thereof.

As shown in FIG. 1, a conventional movable vane pump of this type includes a controller section 1, a motor 2, a hydraulic servo cylinder 3, a pump rod 4 driven by the motor 2, and an operating rod operated by the hydraulic servo cylinder 3. 5. It is composed of a casing 7 that is driven by the pump shaft 4 and also includes a movable blade 6 that is rotated by the operating rod, and a discharge pend 9 that is connected to the casing 7 via a lift pipe 8.

As shown in FIG. 2, the shaft 6a of the movable blade 6 is rotatably pivoted to an invera hub 10 fixed to the lower end of the hollow pump ratchet 4, and the shaft 6a and the lower end of the operating rod 5 The fixed spider 11 is connected via an arm 12, a joint 13 and a turnbuckle 14.

The movable wing shaft 6a, spider 11, arm 12, joint 1
3 and turnbuckle 14 are formed by an invera hub 10 and an invera cap 15 and are housed in an invera boss chamber 16 filled with oil. It is connected to the hydraulic piston 18 in the hydraulic servo cylinder 3 (
(See Figure 3).

The upper and lower chambers of this hydraulic piston 18 are connected to the shaft (not shown) of the motor 2 through operating oil passages (not shown), respectively.
The hollow part of the lotus is suitable. Also hydraulic servo cylinder 3
As shown in FIG. 4, the system for supplying operating oil to the cylinder 3 includes a pressure oil chamber 19 that communicates with the cylinder 3 and a return lever 20 that feedback controls the position of the hydraulic piston 18.
is provided. In the above structure, a mechanism for transmitting the reciprocating motion of the operating rod 5 to the shaft 6a of the movable wing 6 and rotating the shaft 6a, that is, a spider 11 and a turnbuckle 1 are provided.
4, the joint amount 3 and the arm 12 together with the movable blade shaft 6a
Since it is housed in the oil-filled interior boss chamber 16, there is no risk of rust or foreign matter entering.

However, the bearings 17a, 17b of the movable blade shaft 6a are not only subjected to a hydraulic moment, but also the angle adjustment of the movable blade 6 is performed intermittently, and the corresponding rotation of the movable blade shaft 6a is also performed intermittently.

For this reason, the movable blade shaft 6a is subjected to a high load and rotates at a low speed, so that the bearings 17a and 17b form an oil film and become stiff, which may cause an accident such as a splashing. The present invention aims to eliminate the above-mentioned drawbacks, prevent wear of the bearing of the movable vane shaft, rotate the movable vane smoothly, and improve the reliability of the pump. A cylinder is installed on the surface facing the cylinder, and the piston attached to the operating rod for the movable blade shaft is housed in this cylinder, and the cylinder is connected to the Invera boss chamber through the oil intake valve and through the oil discharge valve and flexible pipe. It is characterized in that the oil passages for the bearings are provided in the movable blade shafts.

An embodiment of the present invention will be described below with reference to the drawings.

Among the symbols shown in FIG. 5, the same symbols as those shown in FIG. 2 indicate the same symbols. In Figures 5 to 7, 21
The surface of the invera hub 10 facing the invera boss chamber 16, that is, the amount of invera hub that the operating rod 5 penetrates is 0.
Cylinder fixed to the bottom surface of the cylinder, 22 is the cylinder 21
This piston 2 is a piston that is slidably housed inside.
2 is fixed to the operating rod 5. 23 and 25 are oil intake valves and oil discharge valves provided in the upper part of the cylinder 21;
24 and 26 are oil intake valves and oil discharge valves provided at the lower part of the cylinder 21.

The cylinder 21 is connected to the inbera boss chamber 16 via oil intake valves 23 and 24, and to the adjustable pipe 27 via oil discharge valves 25 and 26.
are connected to each other. Reference numeral 28 denotes a bearing oil passage which is provided in the movable blade core 6a and passes through the cylinder 21 via the flexible tube 27, and its one end is closed to the bearing 17a, and the end thereof is closed to the bearing well 7b.

The rest of the structure is the same as that of the conventional example (FIGS. 1 to 4), so a description thereof will be omitted. Next, the operation of this embodiment configured as described above will be explained.

When the operating rod 5 is lowered to change the angle of the movable blade 6, the piston 22 fixed to the operating rod 5 also descends in the same way, so the upper oil intake valve 23 in the cylinder 21 opens and the oil discharge valve opens. 25 is closed, the lower oil intake valve 24 is closed, and the oil discharge valve 26 is opened.

Therefore, the oil in the lower chamber of the piston 22 flows into the oil passage 28 in the movable wing shaft 6a via the rotor 27, and is further forcibly supplied to the sliding surfaces of the bearings 17a, 17b of the movable wing shaft 6a. Ru. Even when the piston 22 rises, oil can be forcibly supplied to the sliding surfaces of the bearings 17a and 17b in the same manner as described above. As explained above, according to the present invention, lubricating oil can be forcibly supplied to the bearings in accordance with the rotation of the movable blades by the reciprocating movement of the operating rod, thereby preventing wear on the bearings. The pump can rotate smoothly and improve the reliability of the pump.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view of a conventional movable vane pump, and Figure 2 is a vertical cross-sectional view of a conventional movable vane pump.
3 is a detailed sectional view of the hydraulic servo cylinder in FIG. 1, 4 is an explanatory diagram of the operation of the movable blade,
The figure is a sectional view showing one embodiment of the bearing lubrication device for a movable blade shaft according to the present invention, and FIGS. 6 and 7 are enlarged detailed views of sections B and C in FIG. 5. Mother'... Pump shaft 5... Operating rod L
6a...Movable blade shaft, 10...Imbera hub, 16...Imbera boss chamber, stoves 7a, 17b.
...Bearing, 21...Cylinder, 22...Piston,
23, 24... Oil suction valve, 25, 26... Oil discharge valve, 2
7...Kazuno pipe 28...Oil passage for bearing.

Claims (1)

[Claims] 1. In a movable vane pump configured to operate a movable vane shaft provided in an impeller boss chamber by an operating rod penetrating the pump shaft, a cylinder is attached to the surface of the impeller hub facing the impeller boss chamber, and a cylinder is installed within the cylinder to operate the movable vane shaft provided in the impeller boss chamber. In addition to housing the piston attached to the rod, the cylinder is inserted into the impeller boss chamber via an oil intake valve.
A bearing lubricating device characterized in that the oil passages for a bearing provided on the movable blade shaft are connected to each other via an oil discharge valve and a flexible pipe.