JPS6232355B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pump unit used for oil supply equipment, etc.
In particular, when processing a casing that has a pump chamber, strainer chamber, check valve chamber, filter chamber, air separator chamber, etc. inside, the casing must be removed from the processing machine or its mounting position changed during the process. Concerning a hassle-free pump unit.

Conventionally, in the case of a pump unit in which a pump chamber, a strainer chamber, a check valve chamber, a filter chamber, an air separator chamber, etc. are arranged in one casing,
The holes for the pump chamber, strainer chamber, check valve chamber, filter chamber, and air strainer chamber, fluid suction ports, fluid discharge ports, etc. were located on each side of the casing, so it was difficult to machine the casing. In this case, it was necessary to chuck two opposing surfaces to a processing machine to process the other four surfaces, and then replace the casing and process the two opposing surfaces.

The purpose of the present invention is to eliminate the drawbacks of the above-mentioned conventional devices. By arranging the hexahedral casing on either side of the hexahedral casing, excluding two opposing faces, it is possible to eliminate the trouble of removing the casing from the processing machine or repositioning it during processing of the casing. This is a characteristic feature.

Embodiments of the present invention will be described below based on the drawings.
In FIGS. 1 to 7, 1 is a casing, which is formed into a hexahedron. Two opposing surfaces of the casing 1, here both side surfaces 1A and 1B, are the surfaces to be chucked, and as shown in FIG. 4, a fluid suction port 2 is opened on the lower surface 1C of the casing 1, and Then, the fluid discharge port 3 is opened in the upper surface 1D of the casing 1. 4 is a suction pipe attached to the fluid suction port 2.

As shown in FIGS. 5 and 6, the casing 1
A pump chamber 5 is provided inside the pump chamber 5, a machined hole 6 of the pump chamber 5 is provided in the front surface 1E of the casing 1, and the hole 6 is covered with a removable cover member 7. A pump shaft 8 is provided inside and outside the pump chamber 5 by penetrating the lid member 7, and an eccentric rotor 10 equipped with radially movable vanes 9 is mounted on the outer periphery of the shaft 8 on the pump chamber 5 side.
A pump pulley 11 is attached to the outer end of the shaft 8. 1
2 and 13 are an inlet and an outlet opening into the pump chamber 5, respectively.

As shown in FIGS. 4, 6, and 7, a strainer chamber 14 and a check valve chamber 15 are provided in the casing 1 to communicate the pump chamber 5 and the fluid suction port 2. The strainer chamber 14 and the check valve chamber 15 communicate through a communication hole 16A opened in the partition wall 16,
A strainer chamber 14 faces the fluid suction port 2, and a check valve chamber 15 faces the inlet 12 of the pump chamber 5. A machined hole 17 for the strainer chamber 14 is provided on the rear surface 1F of the casing 1. A strainer 18 is inserted into the strainer chamber 14 through the machined hole 17, and the strainer 18 is inserted into the strainer chamber 14.
4 Fit and fix into the support hole 14A provided in the inner wall.
A lid member 19 is removably screwed into the processed hole 17. 20 is a spring that prevents the strainer 18 from coming off.

A machined hole 21 for the check valve chamber 15 is provided in the front surface 1E of the casing 1, and a check valve 22 is inserted into the check valve chamber 15 from the machined hole 21 facing the strainer 18, and the valve seat member 23 is inserted into the check valve chamber 15. is fitted into the communication hole 16A. A valve support shaft 23A is fixed to the valve seat member 23, and a valve member 24 is slidably fitted into the valve support shaft 23A. A lid member 25 is removably screwed into the processed hole 21, and the lid member 25 and the valve member 2
A spring 26 is tensioned between the valve member 4 and the valve member 24 to bias the valve member 24 in the direction of blocking the inflow. Here, in order to facilitate the machining of the machined hole 17, the support hole 14A, the communication hole 16A, and the machined hole 21, each of the machined holes 17, 14A, 16
A and 21 are provided coaxially. Further, the valve support shaft 23A is formed in a cylindrical shape, and when the valve member 24 is fitted, air is trapped between the end of the valve support shaft 23 and the valve member 24 to prevent air from acting as a damper. are doing.

As shown in Figures 1 and 4 to 6,
A filter chamber 2 is provided between the pump chamber 5 and the fluid discharge port 3.
7 is provided, and the outlet 1 of the filter chamber 27 and the pump chamber 5
3 through the chamber 28, and the filter chamber 27
and the fluid discharge port 3 are communicated through passages 29 and 29'. A machined hole 30 for the filter chamber 27 is provided on the rear surface 1F of the casing 1, and after inserting the filter 31 through the hole 30, the hole 30 is covered with a removable lid member 32, as shown in FIG. .

As shown in FIGS. 2 and 6, the passage 29 and the passage 29' are opened at the upper surface 1D of the casing 1, and a check valve 35 is inserted into the passage 29 from the opening 33.
The lid member 3 is capable of inserting the opening 33 and removing the opening 33.
Close the lid at 4. 36 is a spring that biases the check valve 35.

As shown in FIGS. 5 to 7, the filter chamber 2
An air separator chamber 36 is provided between the check valve chamber 15 and the check valve chamber 15.
A machined hole 37 for the air separator chamber 36 is provided on the rear surface 1F of the casing 1, and the hole 37 is covered with a removable cover member 38, as shown in FIG. As shown in FIGS. 4 and 5, a lid member 39 is removably attached to the upper surface 1D of the casing 1, and the filter chamber 27 and the air separator chamber 36 are communicated through a passage 40 formed in the lid member 39. let In this case, a passage 41 that communicates with the filter chamber 27 and the passage 40 is provided on the upper surface 1D of the casing 1, and a passage 42 that communicates the passage 40 with the air separator chamber 36 is provided.

As shown in FIGS. 5 and 7, the air separator chamber 36 and the check valve chamber 15 communicate with each other via a passage 43 provided in the lid member 38. As shown in FIGS. In this case, a passage 44 communicating the air separator chamber 36 and the passage 43 is provided on the rear surface 1F of the casing 1, and a passage 45 communicating the passage 43 and the check valve chamber 15 is provided. A float 46 is installed in the air separator chamber 36.
is provided to be floating, and a valve 47 for opening and closing the passage 44 is attached to the float 46. As shown in FIG. 1, an air hole 48 is provided in the upper surface 1D of the casing 1 to open the air separator chamber 36 to the atmosphere.

As shown in FIG. 1, FIG. 2, FIG. 5, and FIG. 7, a relief valve 49 is attached to the front surface 1E of the casing 1, and the chamber 28 and the check valve chamber 15 are
communicate with. In this case, the front surface 1E of the casing 1 is provided with a passage 51 that communicates the chamber 28 with the passage 50 of the relief valve 49, and a passage 52 that communicates the passage 50 with the check valve chamber 15. A valve body 53 is incorporated in the flow path 50, and when the internal pressure of the chamber 21 reaches a certain level or more, the valve body 53 is activated by a spring 54.
Opens against the spring force of.

In addition, in FIG. 1, 55 is a screw hole for attaching a flow meter (not shown) or the like.

In the pump unit configured as described above, when the pump pulley 11 is rotated clockwise in FIG. 2 by a motor (not shown), the eccentric rotor 10 is rotated in the same direction together with the pump shaft 8, causing eccentric movement of the rotor As a result, a volume change occurs in the chamber formed by the rotor 10, the vanes 9, and the inner surface of the casing 1, and the liquid moves. At this time, the valve member 24 opens against the spring force of the spring 26 due to the suction pressure generated on the inlet 12 side of the pump chamber 5, and the liquid in the oil supply tank (not shown) connected to the suction pipe 4 is The suction pipe 4, the fluid suction port 2, the strainer chamber 14, the strainer 18, the check valve 22, and the check valve chamber 15 lead to the pump inlet 12, and then the pump outlet 1.
The fluid is sequentially discharged from the fluid outlet 3 through the chamber 28, the filter chamber 27, the filter 31, the passage 29, the check valve 35, and the passage 29', and is sent to the oil supply nozzle via a flow meter and the like. Note that the backflow of liquid is prevented by the check valve 35.

Further, to explain the gas-liquid separation process of the above-mentioned device, the liquid containing gas accumulates above the filter chamber 27, and is sequentially sent to the air separator chamber 36 through the passage 41, passage 40, and passage 42, Gas and liquid are separated within the chamber 36, the gas being released to the atmosphere through the air holes 48, and the liquid collecting within the air separator chamber 36. When the liquid accumulates above a certain level, the float 46 floats up, and the valve 47 attached to the float 46 opens to open the passage 44. Therefore, the liquid sequentially passes through the passage 44, passage 43, passage 45 and check valve chamber 15, and returns to the inlet 12 of the pump chamber 5.
is circulated.

After the pump is activated, when actual refueling is not performed, the internal pressure in the chamber 28 increases, so the relief valve 49 closes.
The valve body 53 opens against the spring 54, and the liquid discharged from the pump outlet 13 sequentially passes through the chamber 28, the relief valve 19, and the check valve chamber 15, and then reaches the pump inlet 12.
is circulated.

When the pump is stopped, the valve member 24 closes, so the fluid in the oil supply pipe between the check valve chamber 15, the strainer chamber 14, and the oil supply tank flows down into the oil storage tank (not shown). do not have. Therefore, the subsequent operation of pumping up fluid with the pump is performed smoothly.

As explained above, the present invention forms the casing into a hexahedral shape, and the machined holes, fluid suction port, and fluid discharge port of each of the pump chamber, strainer chamber, check valve chamber, filter chamber, and air separator chamber are formed in the casing. When processing the casing, the processing is completed by performing four-sided processing with the two opposing sides of the casing being chucked by the processing machine. I can do it. Therefore, the trouble of removing and repositioning the casing during processing is eliminated, and production efficiency is significantly increased. Furthermore, since there is no need to perform any processing on the two opposing surfaces, the number of processing steps can be reduced.

In addition, if the holes in the pump chamber, strainer chamber, check valve chamber, filter chamber, and air separator chamber are covered with removable lid members, each chamber can be easily sealed. This has the advantage that it can be secured and that components can be easily taken in and out of each chamber.

In addition, in the case where the pump chamber and check valve chamber are provided with machined holes on one side of the casing, and the strainer chamber, filter chamber and air separator chamber are provided with machined holes on the other side. This has the advantage that space within the casing can be used efficiently.

In addition, in the case where the strainer chamber machining holes, support holes, communication holes, and check valve chamber machining holes are provided coaxially, the chucking surfaces 1A, 1 of the casing 1
There is no need to change the axis of the machining blade when machining each of the holes by inverting the surfaces 1C and 1D around the support point B, making the machining work of the casing even easier.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a pump unit showing an embodiment of the present invention, Fig. 2 is a partially cutaway front view of Fig. 1, Fig. 3 is a rear view of Fig. 1, and Fig. 4 is a view of Fig. 2. 5 is a sectional view taken along the line - in FIG. 2, FIG. 6 is a sectional view taken along the line - in FIG. 5, and FIG.
Line sectional view. 1...Casing, 2...Fluid suction port, 3...
Fluid discharge port, 5... Pump chamber, 14... Strainer chamber, 14A... Support hole, 15... Check valve chamber, 1
6A...Communication hole, 18...Strainer, 22...
Check valve, 26... Spring, 27... Filter chamber, 3
6...Air separator chamber, 6, 17, 21, 3
0, 37... Machining hole, 7, 19, 25, 32, 3
8, 39...lid member, 40, 43...passage.

Claims (1)

[Claims] 1. In a casing having a fluid suction port and a fluid discharge port, a strainer chamber communicating with the fluid suction port, a check valve chamber communicating with the strainer chamber, and a check valve chamber communicating with the check valve chamber. A pump comprising: a pump chamber; a filter chamber that communicates with the pump chamber and the fluid discharge port; and an air separator chamber that communicates with the filter chamber and the check valve chamber through independent passages. In the unit, the casing is formed into a hexahedral shape, and the machined holes of the pump chamber, strainer chamber, check valve chamber, filter chamber, and air separator, the fluid suction port, and the fluid discharge port are located opposite to each other in the casing. A pump unit characterized by being provided on any side except for two sides. 2. The pump according to claim 1, wherein each of the machined holes in the pump chamber, strainer chamber, check valve chamber, filter chamber, and air separator chamber is covered with a removable cover member. unit. 3. A patent claim characterized in that holes for each of the pump chamber and check valve chamber are provided on one surface of the casing, and holes for each of the filter chamber, strainer chamber, and air separator chamber are provided on the other surface. Range 1
Pump unit as described in section. 4. The pump unit according to claim 1, wherein the strainer chamber machining hole, the support hole, the communication hole, and the check valve chamber machining hole are provided coaxially.