A fully enclosed EHA cooling device

Abstract

The utility model relates to a cooling and temperature reduction device for a fully enclosed EHA. Aiming at the problem that the operating frequency of the existing traditional EHA actuator is not very high, if the operating frequency is too high, the oil temperature will quickly rise to reach the limit temperature of the seal, the following scheme is proposed, which includes a fully enclosed EHA body and an accumulator arranged in the fully enclosed EHA body, and also includes a bottom plate, the fully enclosed EHA body is fixedly connected to the top of the bottom plate; the top of the bottom plate is fixedly connected with a base, and the upper side of the base is provided with a cooling component for cooling the hot oil entering the accumulator; an oil outlet pipe and an oil inlet pipe, the oil outlet pipe and the oil inlet pipe are both arranged in the fully enclosed EHA body and connected with the accumulator, and a third connecting pipe and a first connecting pipe are respectively provided on one side of the oil outlet pipe and the oil inlet pipe, and the third connecting pipe and the first connecting pipe are both connected with the cooling component; the device also has the advantages of simple structure, convenient operation, good heat dissipation effect, etc.

Description

Technical Field

[0001] The utility model relates to the technical field of fully enclosed EHA, in particular to a cooling and temperature reduction device for a fully enclosed EHA. Background Art

[0002] Currently, the fully enclosed EHA is a highly integrated hydraulic actuator consisting of a cylinder, a servo motor, a control valve group, a hydraulic pump, and an accumulator (1.2). The extension and retraction of the cylinder are controlled by the forward and reverse rotation of the servo motor.

[0003] However, in the prior art, the internal oil of the EHA is fully enclosed, and the accumulator and the outside air are insulated, so the heat dissipation performance is very poor. The volumetric efficiency of the pump is generally 90%, and the mechanical efficiency is 90%. In this way, 20% of the power is converted into heat. Therefore, the operating frequency of the traditional EHA actuator is not very high. If the operating frequency is too high, the oil temperature will rise quickly and reach the limit temperature of the seal.

[0004] Therefore, it is necessary to provide a device with heat dissipation function while maintaining the advantages of the traditional EHA's completely closed structure. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings in the prior art that the operating frequency of the traditional EHA actuator is not very high. If the operating frequency is too high, the oil temperature will rise quickly to reach the limit temperature of the seal, and a fully enclosed EHA cooling device is proposed.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A cooling device for a fully enclosed EHA, comprising a fully enclosed EHA body and an accumulator arranged in the fully enclosed EHA body, and further comprising:

[0008] A bottom plate, wherein the fully enclosed EHA body is fixedly connected to the top of the bottom plate;

[0009] Wherein, the top end of the bottom plate is fixedly connected with a base, and the upper side of the base is provided with a cooling component for cooling the hot oil entering the accumulator;

[0010] An oil outlet pipe and an oil inlet pipe, both of which are arranged in the fully enclosed EHA body and are connected to the accumulator, and a third connecting pipe and a first connecting pipe are respectively arranged on one side of the oil outlet pipe and the oil inlet pipe, and both of which are connected to the cooling assembly;

[0011] Two sets of connection components, the two sets of connection components are respectively arranged between the oil outlet pipe and the third connecting pipe and the oil inlet pipe and the first connecting pipe, and the two sets of connection components are used to quickly connect the accumulator with the cooling component;

[0012] Two sets of sealing components are respectively arranged in the oil outlet pipe and the oil inlet pipe for sealing the oil outlet pipe and the oil inlet pipe when they are not connected with the third connecting pipe and the first connecting pipe.

[0013] In one possible design, the cooling assembly includes a cooling pump arranged at the top of the base, the third connecting pipe is fixed to the water inlet of the cooling pump, the water outlet of the cooling pump is fixed with a second connecting pipe, the top of the base is fixedly connected with a cooling box, the cooling box is provided with a heat exchange coil for oil to pass through, the top of the base is fixed with a cooling fan for dissipating the oil in the heat exchange coil, the second connecting pipe is fixed to the water inlet of the heat exchange coil, and the first connecting pipe is fixed to the water outlet of the heat exchange coil.

[0014] In a possible design, each group of the connecting components includes a second fixed sleeve and a first fixed sleeve fixedly connected to the oil outlet pipe and the surface of the third connecting pipe, the circumferential surfaces of the first fixed sleeve and the second fixed sleeve are provided with matching external threads, the circumferential surface of the second fixed sleeve is threadedly connected with a nut, and the nut is threadedly connected to the circumferential surface of the first fixed sleeve.

[0015] In a possible design, a positioning block is fixedly connected to a side end of the second fixing sleeve, and a positioning groove matching the positioning block is formed in the first fixing sleeve.

[0016] In a possible design, each group of the sealing components includes a first hollow plate fixedly connected to the oil outlet pipe, a limiting column is slidably connected to the first hollow plate, a sealing plate is fixedly connected to the side end of the limiting column, a sealing ring is fixedly connected to the oil outlet pipe for use with the sealing plate, the sealing ring and the sealing plate cooperate to seal the oil outlet pipe, and a spring is fixedly connected between the fully enclosed EHA body and the first hollow plate, and the spring is sleeved on the surface of the limiting column.

[0017] In a possible design, the sealing assembly also includes a second hollow plate fixedly connected to the third connecting tube, a second extrusion block is fixedly connected to the side end of the second hollow plate, and an end of the sealing plate close to the second extrusion block is fixedly connected to the first extrusion block, and the first extrusion block and the second extrusion block are extruded against each other.

[0018] In the present application, the bypass throttle valve of the two-way pump oil drain port in the fully enclosed EHA body throttles and generates heat, and the hot oil will gather in the accumulator. The cooling pump extracts the hot oil in the accumulator and sends it to the heat exchange coil through the oil outlet pipe and the third connecting pipe. The heat dissipation fan is used to air-cool the oil in the heat exchange coil to quickly dissipate the heat in the hot oil, so that the oil returns to the accumulator after maintaining a stable temperature. At this time, the fully enclosed EHA body uses the oil in the accumulator again, and there is no need to worry about the problem of excessive oil temperature.

[0019] When the cooling system needs to be replaced or repaired, the nut can be screwed away from the surface of the first fixed sleeve to release the connection between the oil outlet pipe and the third connecting pipe. At the same time, the sealing plate loses its extrusion, and the elasticity of the spring pushes the sealing plate to fit the sealing ring, thereby sealing the oil outlet pipe to prevent leakage of the oil in the accumulator and ensure the normal use of the fully enclosed EHA body. After maintenance, the positioning block is inserted into the positioning groove and the nut is screwed to the surfaces of the second fixed sleeve and the first fixed sleeve. The second extrusion block squeezes the first extrusion block, so that the sealing ring and the first extrusion block can be separated, thereby ensuring the connectivity of the oil outlet pipe and the third connecting pipe. Beneficial Effects

[0020] In the utility model, the cooling device for a fully enclosed EHA can achieve the effect of circulating and cooling the hot oil in the accumulator through a cooling component, which can solve the problem of heat dissipation difficulties of the fully enclosed EHA, so that the EHA oil cylinder can be continuously extended and retracted for a long time to work without causing the oil temperature to be too high;

[0021] In the utility model, the cooling and temperature reduction equipment for a fully enclosed EHA can achieve the effect of quickly connecting the accumulator and the cold zone component through a connecting component; in the utility model, by setting a cooling component, a cooling pump and a heat exchange coil are used to cool the hot oil entering the accumulator, thereby improving the heat dissipation effect. At the same time, through the design of the connecting component and the sealing component, fast connection and sealing are achieved, the structure is simplified, and the maintenance difficulty is reduced. The device also has the advantages of simple structure, easy operation, good heat dissipation effect, etc., and can be widely used in cooling systems of various fully enclosed EHAs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a front perspective view of a fully enclosed EHA cooling device proposed by the utility model;

[0023] Figure 2 This is a cross-sectional view of the pipe connection of a fully enclosed EHA cooling device proposed by the utility model;

[0024] Figure 3 This is a partial stereogram of a fully enclosed EHA cooling device proposed by the utility model;

[0025] Figure 4 This is a schematic diagram of the principle of a fully enclosed EHA cooling device proposed in the utility model.

[0026] In the figure: 1. Fully enclosed EHA body; 1.1. Two-way pump; 1.2. Accumulator; 1.3. Bypass throttle valve; 1.4. Oil replenishment one-way valve; 2. Cooling assembly; 2.1. Cooling pump; 2.2. Cooling box; 3. Connecting assembly; 4. Base; 5. Oil outlet pipe; 6. Oil inlet pipe; 7. First connecting pipe; 8. Second connecting pipe; 9. Third connecting pipe; 13. Positioning groove; 14. Nut; 15. Positioning block; 16. First fixed sleeve; 17. Second fixed sleeve; 18. First hollow plate; 19. Limiting column; 20. Spring; 21. Sealing plate; 22. Sealing ring; 23. First extrusion block; 24. Second hollow plate; 25. Second extrusion block; 26. Bottom plate; 27. Cooling fan. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Example

[0028] Reference Figure 1-Figure 4 A cooling device for a fully enclosed EHA, which is used in the field of fully enclosed EHA technology, comprises a fully enclosed EHA body 1 and an accumulator 1.2 arranged therein, wherein the fully enclosed EHA body 1 is fixedly connected to the top of a bottom plate 26, the top of the bottom plate 26 is fixedly connected to a base 4, and a cooling assembly 2 is arranged on the upper side of the base 4 for cooling the hot oil entering the accumulator 1.2;

[0029] Furthermore, the cooling assembly 2 is mainly composed of a cooling pump 2.1, a second connecting pipe 8, a cooling box 2.2 and a cooling fan 27. The water inlet of the cooling pump 2.1 is connected to the oil outlet pipe 5 through the third connecting pipe 9. The oil outlet pipe 5 and the oil inlet pipe 6 are both connected to the accumulator 1.2. The water outlet of the cooling pump 2.1 is connected to the heat exchange coil in the cooling box 2.2 through the second connecting pipe 8. The heat exchange coil is used to supply oil to pass through, and the cooling fan 27 at the top of the base 4 is used to air-cool the oil in the heat exchange coil. Finally, the cooled oil flows back to the oil inlet pipe 6 through the first connecting pipe 7, forming a complete cooling cycle.

[0030] The two groups of connecting components 3 are respectively arranged between the oil outlet pipe 5 and the third connecting pipe 9 and the oil inlet pipe 6 and the first connecting pipe 7. Each group of connecting components 3 includes a first fixed sleeve 16 and a second fixed sleeve 17, which are connected by an external thread and a nut 14 to achieve quick connection and disconnection. In addition, a positioning block 15 is fixed to the side end of the second fixed sleeve 17, and a positioning groove 13 matching the positioning block 15 is opened in the first fixed sleeve 16 to improve the accuracy and stability of the connection. Example

[0031] refer to Figure 1-Figure 4 , improved on the basis of Example 1: a cooling device further includes two sets of sealing components, the two sets of sealing components are respectively arranged in the oil outlet pipe 5 and the oil inlet pipe 6, each set of sealing components includes a first hollow plate 18, a limit column 19, a sealing plate 21 and a sealing ring 22, a spring 20 is connected between the fully enclosed EHA body 1 and the first hollow plate 18, and the spring 20 is sleeved on the surface of the limit column 19. When the connecting component 3 is not connected, the spring 20 pushes the limit column 19 and the sealing plate 21 to move toward the pipe opening direction of the oil outlet pipe 5 or the oil inlet pipe 6, so that the sealing plate 21 is tightly fitted with the sealing ring 22 to achieve the sealing of the pipeline;

[0032] A second hollow plate 24 is fixed in the third connecting pipe 9, and a second extrusion block 25 is fixedly connected to the side end of the second hollow plate 24. When connection is required, the first extrusion block 23 and the second extrusion block 25 are squeezed against each other by operating the connecting assembly 3, thereby pushing the sealing plate 21 to move away from the pipe mouth and releasing the sealing state.

[0033] However, as is well known to those skilled in the art, the working principle and wiring method of the fully enclosed EHA body 1 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art may make any selections according to their needs or convenience.

[0034] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A cooling device for a fully enclosed EHA, comprising a fully enclosed EHA body (1) and an accumulator (1.2) arranged in the fully enclosed EHA body (1), characterized in that: Also includes: A bottom plate (26), wherein the fully enclosed EHA body (1) is fixedly connected to the top of the bottom plate (26); The top end of the bottom plate (26) is fixedly connected to a base (4), and the upper side of the base (4) is provided with a cooling assembly (2) for cooling hot oil entering the accumulator (1.2); An oil outlet pipe (5) and an oil inlet pipe (6), wherein the oil outlet pipe (5) and the oil inlet pipe (6) are both arranged in the fully enclosed EHA body (1) and are connected to the accumulator (1.2); a third connecting pipe (9) and a first connecting pipe (7) are respectively arranged on one side of the oil outlet pipe (5) and the oil inlet pipe (6); and the third connecting pipe (9) and the first connecting pipe (7) are both connected to the cooling assembly (2); Two sets of connection components (3), the two sets of connection components (3) are respectively arranged between the oil outlet pipe (5) and the third connecting pipe (9) and the oil inlet pipe (6) and the first connecting pipe (7), and the two sets of connection components (3) are used to quickly connect the accumulator (1.2) and the cooling component (2); Two sets of sealing components are respectively arranged in the oil outlet pipe (5) and the oil inlet pipe (6) and are used to seal the oil outlet pipe (5) and the oil inlet pipe (6) when they are not connected to the third connecting pipe (9) and the first connecting pipe (7).

2. A fully enclosed EHA cooling device according to claim 1, characterized in that: The cooling assembly (2) comprises a cooling pump (2.1) arranged at the top of a base (4), the third connecting pipe (9) is fixed to the water inlet of the cooling pump (2.1), the water outlet of the cooling pump (2.1) is fixed with a second connecting pipe (8), the top of the base (4) is fixedly connected with a cooling box (2.2), a heat exchange coil for oil to pass through is arranged in the cooling box (2.2), a cooling fan (27) for dissipating the oil in the heat exchange coil is fixed to the top of the base (4), the second connecting pipe (8) is fixed to the water inlet of the heat exchange coil, and the first connecting pipe (7) is fixed to the water outlet of the heat exchange coil.

3. A fully enclosed EHA cooling device according to claim 2, characterized in that: Each group of the connecting components (3) comprises a second fixed sleeve (17) and a first fixed sleeve (16) fixedly connected to the surface of the oil outlet pipe (5) and the third connecting pipe (9); the circumferential surfaces of the first fixed sleeve (16) and the second fixed sleeve (17) are provided with matching external threads; the circumferential surface of the second fixed sleeve (17) is threadedly connected to a nut (14); and the nut (14) is threadedly connected to the circumferential surface of the first fixed sleeve (16).

4. A fully enclosed EHA cooling device according to claim 3, characterized in that: A positioning block (15) is fixedly connected to a side end of the second fixed sleeve (17), and a positioning groove (13) matching the positioning block (15) is provided in the first fixed sleeve (16).

5. A fully enclosed EHA cooling device according to any one of claims 1 to 3, characterized in that: Each group of the sealing components comprises a first hollow plate (18) fixedly connected to the oil outlet pipe (5); a limiting column (19) is slidably connected to the first hollow plate (18); a sealing plate (21) is fixedly connected to the side end of the limiting column (19); a sealing ring (22) used in conjunction with the sealing plate (21) is fixedly connected to the oil outlet pipe (5); the sealing ring (22) and the sealing plate (21) cooperate to seal the oil outlet pipe (5); a spring (20) is fixedly connected between the fully enclosed EHA body (1) and the first hollow plate (18); the spring (20) is sleeved on the surface of the limiting column (19).

6. A fully enclosed EHA cooling device according to claim 5, characterized in that: The sealing assembly further comprises a second hollow plate (24) fixedly connected to the inside of the third connecting pipe (9); a second extrusion block (25) is fixedly connected to a side end of the second hollow plate (24); an end of the sealing plate (21) close to the second extrusion block (25) is fixedly connected to a first extrusion block (23); the first extrusion block (23) and the second extrusion block (25) are mutually extruded.

Images