Direct-current hydraulic power unit

Abstract

The utility model discloses a direct current hydraulic power unit which comprises a mounting seat, a hydraulic pump, a driving motor and an oil cooling structure are mounted on the mounting seat, the driving motor is in transmission connection with the hydraulic pump, an oil cavity is arranged in the mounting seat, and the hydraulic pump, the oil cooling structure, the oil cavity and the hydraulic pump are sequentially communicated to form a circulating oil way. The oil cooling structure comprises an oil inlet tank, an oil outlet tank, a cooling water inlet main pipe and a cooling water outlet main pipe, and the oil inlet tank is communicated with the hydraulic pump through an oil return pipe. The hydraulic oil viscosity is prevented from being influenced by too high temperature of the hydraulic oil, and the use stability of the hydraulic oil is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic power structures, in particular to a direct current hydraulic power unit. Background Art

[0002] Hydraulic power units are now widely used as power sources for various mechanical equipment. Hydraulic power units are used as oil supply devices and are connected to hydraulic actuators through external piping systems and various valves. Most of the current hydraulic power units use hydraulic oil with continuous fluidity, and convert the mechanical energy of the motor driving the hydraulic pump into the pressure energy of the hydraulic oil through a hydraulic pump.

[0003] However, the hydraulic oil tends to heat up after being pressurized inside the equipment, which will affect the viscosity of the hydraulic oil after long-term use and affect the effectiveness of the hydraulic oil. Summary of the invention

[0004] In view of the above problems of the existing DC hydraulic power unit, the present invention aims to provide a DC hydraulic power unit which has stable use and excellent cooling effect.

[0005] The specific technical solutions are as follows:

[0006] A DC hydraulic power unit comprises: a mounting seat, on which a hydraulic pump, a driving motor connected to the hydraulic pump and a cooling oil structure are mounted, an oil chamber is provided in the mounting seat, the hydraulic pump, the cooling oil structure, the oil chamber and the hydraulic pump are connected in sequence to form a circulating oil circuit, and the cooling oil structure comprises:

[0007] An oil inlet tank, the oil inlet tank being connected to the hydraulic pump via an oil return pipe;

[0008] An oil outlet tank, the oil outlet tank is arranged directly below the oil inlet tank and is connected to the oil cavity through an oil outlet pipe, and the oil outlet tank is connected to the oil inlet tank through a plurality of vertical connecting pipes;

[0009] A cooling water inlet pipe, wherein the cooling water inlet pipe is an open structure at one end, and the closed end of the cooling water inlet pipe is passed through the oil inlet tank;

[0010] A cooling water outlet main pipe, the cooling water outlet main pipe is an open structure at one end, and the closed end of the cooling water outlet main pipe is passed through the oil outlet tank, and the cooling water outlet main pipe is connected to the cooling water inlet main pipe through a plurality of cooling pipes, and the plurality of cooling pipes are coaxially sleeved in the plurality of connecting pipes, and a spiral track is sleeved on the outside of each cooling pipe.

[0011] As a further improvement and optimization of this solution, the outer diameter of the spiral track matches the inner diameter of the connecting pipe.

[0012] As a further improvement and optimization of the present solution, the axial length of the spiral track matches the length of the connecting tube.

[0013] As a further improvement and optimization of this solution, the spiral track and the cooling pipe are an integrated structure.

[0014] As a further improvement and optimization of the present solution, the oil inlet tank and the oil outlet tank are both rectangular box structures, and a plurality of the connecting pipes are evenly spaced along the length direction of the oil inlet tank.

[0015] As a further improvement and optimization of this solution, the oil outlet pipe is connected to the top of the oil chamber.

[0016] As a further improvement and optimization of this solution, the oil chamber is connected to the hydraulic pump through an oil inlet pipe.

[0017] As a further improvement and optimization of this solution, the oil inlet end of the oil inlet pipe is connected to the bottom of the oil chamber.

[0018] Compared with the prior art, the above technical solution has the following positive effects:

[0019] (1) In the utility model, the hydraulic oil heated by the hydraulic pressure in the hydraulic pump flows into the cold oil structure through the oil return pipe for cooling. The cooled hydraulic oil is then input into the hydraulic pump again through the oil outlet pipe and the oil chamber in sequence, thereby preventing the hydraulic oil temperature from being too high and affecting the viscosity of the hydraulic oil, thereby improving the stability of the use of the hydraulic oil.

[0020] (2) In the utility model, the hydraulic oil in the oil inlet tank is diverted by a plurality of connecting pipes, and the hydraulic oil in the plurality of connecting pipes is cooled by a plurality of cooling pipes, thereby ensuring the flow rate of the hydraulic oil cooling and improving the cooling effect.

[0021] (3) In the utility model, the hydraulic oil in the connecting pipe flows downward through the spiral track, increasing the flow stroke of the hydraulic oil in the connecting pipe and further improving the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of a DC hydraulic power unit of the utility model;

[0023] Figure 2 It is a cross-sectional view of a cooling oil structure of a DC hydraulic power unit of the utility model;

[0024] In the attached figure: 1. mounting base; 2. driving motor; 3. hydraulic pump; 4. oil return pipe; 5. cold oil structure; 6. oil outlet pipe; 7. oil inlet pipe; 11. oil chamber; 51. oil inlet tank; 52. oil outlet tank; 53. connecting pipe; 54. cooling water inlet main pipe; 55. cooling water outlet main pipe; 56. cooling pipe; 57. spiral track. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Figure 1 This is a schematic diagram of the structure of a DC hydraulic power unit of the utility model. Figure 2 This is a cross-sectional view of the cooling oil structure of a DC hydraulic power unit of the utility model, such as Figure 1-2As shown, a DC hydraulic power unit of a preferred embodiment is shown, comprising: a mounting base 1, a hydraulic pump 3, a driving motor 2 and a cold oil structure 5 are mounted on the mounting base 1, an oil chamber 11 is provided in the mounting base 1, the hydraulic pump 3, the cold oil structure 5, the oil chamber 11 and the hydraulic pump 3 are connected in sequence to form a circulating oil circuit, the cold oil structure 5 comprises an oil inlet tank 51, an oil outlet tank 52, a cooling water inlet pipe 54 and a cooling water outlet pipe 55, the oil inlet tank 51 is connected to the hydraulic pump 3 through an oil return pipe 4, the oil outlet tank 52 is arranged directly below the oil inlet tank 51 and is connected to the oil through an oil outlet pipe 6 The oil outlet tank 52 is connected to the oil inlet tank 51 through a plurality of vertical connecting pipes 53, the cooling water inlet main pipe 54 is an open structure at one end, and the closed end of the cooling water inlet main pipe 54 is passed through the oil inlet tank 51, the cooling water outlet main pipe 55 is an open structure at one end, and the closed end of the cooling water outlet main pipe 55 is passed through the oil outlet tank 52, and the cooling water outlet main pipe 55 is connected to the cooling water inlet main pipe 54 through a plurality of cooling pipes 56, and the plurality of cooling pipes 56 are coaxially sleeved in the plurality of connecting pipes 53, and a spiral track 57 is sleeved on the outside of each cooling pipe 56.

[0029] In this embodiment, the hydraulic oil heated up by the hydraulic pressure in the hydraulic pump 3 flows into the cooling structure through the oil return pipe 4 for cooling. The cooled hydraulic oil is then input into the hydraulic pump 3 again through the oil outlet pipe 6 and the oil chamber 11 in sequence, so as to avoid the hydraulic oil temperature being too high and affecting the viscosity of the hydraulic oil, thereby improving the stability of the use of the hydraulic oil.

[0030] In this embodiment, when the cooling structure cools down the hydraulic oil, it flows into the oil inlet tank 51 through the oil return pipe 4 and is distributed to a plurality of connecting pipes 53. The cooling water inlet main pipe 54 inputs cooling water to a plurality of cooling pipes 56. When the hydraulic oil entering each connecting pipe 53 flows toward the oil outlet tank 52 along the spiral direction of the spiral track 57, it exchanges heat with the cooling water in the cooling pipe 56 to cool down. The cooled hydraulic oil flows into the oil outlet tank 52 in a concentrated manner, and flows into the oil cavity 11 in a concentrated manner through the oil outlet pipe 6.

[0031] In this embodiment, the hydraulic oil in the oil inlet tank 51 is diverted by a plurality of connecting pipes 53, and the hydraulic oil in the plurality of connecting pipes 53 is cooled by a plurality of cooling pipes 56, thereby ensuring the flow rate of the hydraulic oil cooling and improving the cooling effect.

[0032] In this embodiment, the hydraulic oil in the connecting pipe 53 flows downward through the spiral track 57, which increases the flow distance of the hydraulic oil in the connecting pipe 53 and further improves the cooling effect.

[0033] Preferably, cooling water may be delivered to the cooling water inlet main pipe 54 by a water pump.

[0034] Further, as a preferred embodiment, the outer diameter of the spiral track 57 matches the inner diameter of the connecting pipe 53 .

[0035] Further, as a preferred embodiment, the axial length of the spiral track 57 matches the length of the connecting pipe 53 .

[0036] Furthermore, as a preferred embodiment, the spiral track 57 and the cooling pipe 56 are an integrated structure.

[0037] Furthermore, as a preferred embodiment, the oil inlet tank 51 and the oil outlet tank 52 are both rectangular box structures, and a plurality of connecting pipes 53 are distributed at equal intervals along the length direction of the oil inlet tank 51 .

[0038] Further, as a preferred embodiment, the oil outlet pipe 6 is communicated with the top of the oil chamber 11 .

[0039] Furthermore, as a preferred embodiment, the oil chamber 11 is connected to the hydraulic pump 3 through the oil inlet pipe 7.

[0040] Furthermore, as a preferred embodiment, the oil inlet end of the oil inlet pipe 7 is connected to the bottom of the oil chamber 11 .

[0041] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A DC hydraulic power unit, characterized in that: include: A mounting seat is provided on which a hydraulic pump, a driving motor connected to the hydraulic pump and a cold oil structure are installed. An oil cavity is provided in the mounting seat. The hydraulic pump, the cold oil structure, the oil cavity and the hydraulic pump are connected in sequence to form a circulating oil circuit. The cold oil structure comprises: An oil inlet tank, the oil inlet tank being connected to the hydraulic pump via an oil return pipe; An oil outlet tank, the oil outlet tank is arranged directly below the oil inlet tank and is connected to the oil cavity through an oil outlet pipe, and the oil outlet tank is connected to the oil inlet tank through a plurality of vertical connecting pipes; A cooling water inlet pipe, wherein the cooling water inlet pipe is an open structure at one end, and the closed end of the cooling water inlet pipe is passed through the oil inlet tank; A cooling water outlet main pipe, the cooling water outlet main pipe is an open structure at one end, and the closed end of the cooling water outlet main pipe is passed through the oil outlet tank, and the cooling water outlet main pipe is connected to the cooling water inlet main pipe through a plurality of cooling pipes, and the plurality of cooling pipes are coaxially sleeved in the plurality of connecting pipes, and a spiral track is sleeved on the outside of each cooling pipe.

2. The DC hydraulic power unit according to claim 1, characterized in that: The outer diameter of the spiral track matches the inner diameter of the connecting pipe.

3. The DC hydraulic power unit according to claim 2, characterized in that: The axial length of the spiral track matches the length of the connecting pipe.

4. The DC hydraulic power unit according to claim 3, characterized in that: The spiral track and the cooling pipe are an integrated structure.

5. The DC hydraulic power unit according to claim 1, characterized in that: The oil inlet tank and the oil outlet tank are both rectangular box structures, and a plurality of connecting pipes are distributed at equal intervals along the length direction of the oil inlet tank.

6. The DC hydraulic power unit according to claim 1, characterized in that: The oil outlet pipe is communicated with the top of the oil chamber.

7. The DC hydraulic power unit according to claim 1, characterized in that: The oil chamber is communicated with the hydraulic pump through an oil inlet pipe.

8. The DC hydraulic power unit according to claim 7, characterized in that: The oil inlet end of the oil inlet pipe is communicated with the bottom of the oil chamber.

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