JP2511874B2 - A combination of a fluid tank, an air / fluid cooler, and a mounting device for a prime mover and pump of a hydraulic power unit. - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a combination of a fluid tank, an air / fluid cooler, and a mounting device for a prime mover and a pump of a hydraulic power unit, and particularly to a small size as a whole. Therefore, it is possible to reduce the floor area required for the entire combination, and to make the ratio of the volume of the tank to the flow rate of the pump approximately the same (that is, approximately 1: 1) and to cool the fluid. The present invention relates to a combination body capable of effectively performing.

(Prior Art) A hydraulic (hydraulic) power plant usually has a prime mover such as an electric motor or a gasoline engine or a diesel engine, a pump, a fluid tank, a control valve, a cooler, and a filter. The prime mover / pump assembly requires special alignment and shims,
It is usually mounted on a machined base surface that is attached to the top, bottom or sides of a fluid tank. In conventional devices, the fluid tank is sized to have a volume equivalent to three times the pump flow rate.

(Problems to be Solved by the Invention) According to the conventional device, the returned fluid cannot be sufficiently cooled unless the volume of the tank is increased with respect to the flow rate of the pump. Therefore, such a tank is large and expensive, and requires a floor area that is two to three times as large as the floor area occupied by only the prime mover / pump assembly, and in the end, the overall size of the hydraulic power unit becomes large and necessary. The floor area had also grown.

The present invention aims to solve such a problem.

(Means for Solving the Problems) The reference numerals used in the embodiments of the present invention to be described later are additionally described for reference, and the present invention provides a prime mover for a fluid tank, an air / fluid cooler, and a hydraulic power unit. And a tank 12 having, as a combination with a mounting device for a pump, mounting plates 32, 34 which are parallel to each other and are aligned in the lateral direction on opposite walls, and the inside of the tank 12. The tank 12 in fluid tight relationship
The reaction torque tube 36 extending between the opposing walls of
As a result, the fluid in the tank 12 is transferred to the torque tube 36.
The reaction torque tube 36, which is in direct thermal contact with one surface of the torque tube 36 and is mechanically connected to the mounting plates 32, 34 in a reaction torque transmitting relationship. Motor 32 having a rotary output shaft 37 mounted to one of the mounting plates 32 and extending inside the reaction torque tube 36 and toward the other one of the mounting plates 34.
And a rotary input shaft 38 mounted on the other one 34 of the mounting plates and drivingly connected to a rotary output shaft 37 of the prime mover 14.
And a pump 16 having

(Operation and Effect of the Invention) The width between the mounting plates 32 and 34 of the tank 12 is determined by the motor 14
Of the rotary output shaft 37 and the rotary input shaft 38 of the pump 16 as well as the spacing required for the universal joint 39. The mounting plate 32 for mounting the prime mover 14 and the mounting plate 34 for mounting the pump 16 are first machined and then welded to the sides of the tank 12. These mounting plates 32, 34 are then drilled in line to allow for accurate centering. Large diameter reaction torque tube 36
The two mounting plates 32, 34 are interconnected by
It acts to absorb the reaction torque between the prime mover 14 and the pump 16. By adopting the basic structure including the mounting plates 32 and 34 and the reaction torque tube 36, the tank 12 is integrally provided with the mounting plates 32 and 34 for mounting the prime mover 14 and the pump 16. In addition, the prime mover 14 and the pump 16 can be automatically and favorably aligned with each other, and the overall size and size are compact, so that an extra floor space is practically unnecessary. Further, the reaction torque tube 36 acts as an air-fluid cooler interface, and the hot fluid returned to the tank 12 transfers its heat to one surface of the reaction torque tube 36. Since the other surface of the reaction torque tube 36 is cooled by the airflow, heat is released from the reaction torque tube 36 to the outside. Therefore, even if the tank 12 itself is not enlarged, the fluid returned into the tank 12 can be effectively cooled by the heat radiation effect of the reaction torque tube 36 interposed in the tank 12.

Thus, according to the present invention, (a) relatively efficient and compact mounting of a prime mover / pump, (b) mounting of a built-in air / fluid cooler, and (c) efficient fluid storage. Can be obtained. The assembled hydraulic power unit can be one-third to one-fifth the size of those currently on the market, and the total combined area is less than 5% less than the floor area required only by the prime mover / pump assembly. It only requires extra floor space. An important feature is the possibility of reducing the ratio of tank volume to pump flow rate from 3: 1 to 1: 1.

(Embodiment) Referring to FIG. 1 showing an embodiment of the present invention, a hydraulic power unit 10 includes a fluid tank (hereinafter referred to simply as "tank").
12), a prime mover 14, and a pump 16. Prime mover
As a mounting device for 14 and pump 16, tank 12 is provided with a pair of mounting plates 32, 34. Tank 12
Is fixed to the base member / dripping tray 18. The hydraulic power unit 10 is provided with a normal check valve 20 and a filter 22. Further, the tank 12 is provided with a normal float switch 24 and a float 26 inside.

The tank 12 comprises a generally rectangular enclosure 30 formed by casting or welding. The tank 12 is provided with the above-mentioned pair of mounting plates 32 and 34 on which the prime mover 14 and the pump 16 are mounted on their respective surfaces.

The reaction torque plate 36 extends through the tank 12 in a fluid-tight manner and extends from the mounting plate 32 to the mounting plate 34 to absorb the reaction torque between the prime mover 14 and the pump 16 and at the same time for conductive cooling of the fluid in the tank 12. Serves the dual function of forming a relatively large cylindrical surface of. Prime mover
The 14 rotary output shafts 37 are coaxially connected by a universal joint 39 to the rotary input shaft 38 of the pump 16.

The mounting plate 34 is formed with a plurality of air inlets 40 radially outwardly spaced from an opening 42 for a rotary input shaft 38 of the pump 16. The mounting plate 34 is also baffle tube spaced radially outward of the inlet 40 and extending within the mounting plate 34 proximate to the fan 48 mounted on the rotary output shaft 37 of the prime mover 14. A plurality of air outlets 44 separated from the inlet 40 at 46 are formed. The fan 48 draws air axially inward through the inlet 40 of the mounting plate 34 in the direction of the dashed arrow, and then the air is forced radially outwardly toward the reaction torque tube 36 and further to the mounting plate 34. Outlet
Flowed axially outwardly via 44, thus cooling the inner surface of the reaction torque tube 36 and thus the fluid in the tank 12 on the outside thereof.

As clearly shown in FIGS. 2 and 3, the fluid is
The tank 12 is connected through a downwardly extending intake pipe 50 that opens at the lower end of the degassing chamber 52 defined by the baffle plate 54.
Return to An upward flow of fluid is hydraulically induced in the degassing chamber 52, which causes the fluid to pass over the baffle plate 54 and pass past the reaction torque tube 36 around the fluid outlet 56.
It is degassed as it flows towards and thereby minimizes the volume requirements of tank 12.

As mentioned above, it is clear that the present invention results in a compact mounting of both the prime mover and the pump of the hydraulic power unit. With this mounting configuration, a relatively large torsional load induced by the prime mover and the pump can be accommodated in a minimum space.

The flow of cooling air is formed by a fan driven by a prime mover. Air flows axially inwards and then radially outwards, cooling the inner surface of the reaction torque tube and from there to the outside. Air enters and exits the reaction torque tube through a machined inlet in the mounting plate that mounts the pump. As a result, about 40 liters (10
A gallon tank can remove the same amount of heat as a typical 240 liter (60 gallon) tank.

The baffle plate ensures that the fluid is degassed before returning to the pump. The baffle plate hydraulically lifts the bubbled fluid to the surface of the fluid in the tank, which allows the bubbles to escape before the fluid returns to the pump. In this way, this tank allows the fluid to be degassed up to four times faster than a conventional tank.

[Brief description of drawings]

FIG. 1 is a side view showing a combination of a fluid tank, an air / fluid cooler, and a mounting device by cutting away a part thereof according to an embodiment of the present invention, and FIG. 2 is a direction of an arrow 2 in FIG. FIG. 3 is a side view seen in FIG. 3, and FIG. 3 is a transverse sectional view taken along line 3-3 in FIG. 10 …… hydraulic power unit, 14 …… motor, 16 …… pump, 12 …… tank, 20 …… check valve, 30 …… enclosure, 32,3
4 …… A pair of mounting plates, 36 …… Reaction torque tube, 37 …… Rotation output shaft, 38 …… Rotation input shaft, 40 …… Inlet, 42 …… Opening, 44 …… Outlet, 46 …… Baffle tube,
52 ... Deaeration chamber, 54 ... Baffle plate, 56 ... Fluid outlet.

Claims (4)

(57) [Claims] 1. A mounting plate (32) which is a combination of a fluid tank, an air / fluid cooler, and a mounting device for a prime mover and a pump of a hydraulic power unit, and which is aligned in a lateral direction in parallel with each other. , (34) on the opposite wall (12)
And a reaction torque tube (3) extending between the opposing walls of the tank (12) in fluid-tight relation with the inside of the tank (12).
6) so that the fluid in the tank (12) is in direct heat conductive contact with one surface of the torque tube (36), the torque tube (36) forming a reaction torque transmitting relationship and The reaction torque tube (36) mechanically connected to the mounting plate (32, 34) and inside the reaction torque tube (36) mounted on one of the mounting plates (32) A prime mover (14) having a rotary output shaft (37) extending towards the other one of the plates (34), and a rotary output of the prime mover (14) mounted on the other one of the mounting plates (34) A combination of a fluid tank, an air / fluid cooler, and a mounting device including a pump (16) having a rotary input shaft (38) drivingly connected to a shaft (37). 2. A fan (48) mounted on one (37) of the shafts (37, 38) and one (34) of the mounting plates.
Means for producing an air flow inside the torque tube (36) for cooling the fluid contained in the tank (12), which has an air inlet (40) and an air outlet (44) provided in A combination of a fluid tank, an air / fluid cooler, and a mounting device according to claim 1. 3. A baffle tube (46) extends in the axial direction of the torque tube (36) between the inflow port (40) and the outflow port (44) to generate an air flow between the inflow port and the outflow port. The fluid tank and the air according to claim 2 which are separated from each other.
A combination of a fluid cooler and a mounting device. 4. A fluid outlet (56) provided at the bottom of the tank (12) and a baffle plate provided in the tank (12) and capable of overcoming fluid to reach the fluid outlet (56). A first degassing chamber (52) defined by (54) and an intake pipe (50) having a fluid discharge opening at a lower end of the degassing chamber (52).
A combination of the fluid tank, the air / fluid cooler, and the mounting device described in the item.