Hydraulic oil tank

Abstract

The utility model relates to a hydraulic oil tank, in particular to a hydraulic oil tank which comprises a tank body, a heater and an oil suction pipe. A shell is fixedly installed at the position, below the liquid level of oil, in the box body, the heater is fixedly installed in an inner cavity of the shell, the shell is provided with an oil passing channel communicated with the interior and the exterior of the shell, and the oil inlet end of the oil suction pipe is fixedly connected to the shell and communicated with the inner cavity of the shell. According to the utility model, the shell forms a regional small space communicated with the outside in the box body, when the heater heats hydraulic oil, the temperature of the oil in the region can quickly rise, and the hydraulic system sucks the oil from the inner cavity of the shell through the oil suction pipe, so that the oil in the pipeline of the hydraulic system can quickly reach the required temperature; and the heating efficiency is improved.

Description

Technical Field

[0001] The utility model relates to an oil tank, more specifically, to a hydraulic oil tank. Background Art

[0002] On construction machinery, the hydraulic oil tank is used to store the hydraulic oil of the hydraulic system, and also performs defoaming, heat dissipation and filtration on the hydraulic oil. The hydraulic system of construction machinery has high requirements for the oil temperature. When the oil temperature is low, the oil viscosity is high, which affects the action of the hydraulic components. Therefore, in some low-temperature areas, operating machinery needs to be warmed up before operation to increase the hydraulic oil temperature. In order to speed up the warm-up process, a heater is usually installed in the hydraulic oil tank. The heater uses thermal convection to heat the oil in the entire tank to quickly increase the oil temperature.

[0003] In the existing hydraulic oil tank, when the heater heats the oil in the tank, the oil is in a natural convection state, and the oil temperature at various positions in the tank is uneven. The temperature of the oil drawn from the tank by the hydraulic system may be low for a long time. The oil in the pipeline of the hydraulic system may need to wait until the hydraulic oil temperature of the entire hydraulic oil tank reaches a predetermined value before the oil in the pipeline of the hydraulic system reaches the temperature for normal operation of the hydraulic system. Compared with the heating power of the heater, the amount of oil in the hydraulic oil tank is large. If the temperature of the oil in the entire hydraulic oil tank is to rise to a certain value, it takes a long time, that is, it takes a long time for the hydraulic oil entering the pipeline of the hydraulic system to reach the predetermined temperature, and the warm-up efficiency is low. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the heating efficiency of the heater in the hydraulic oil tank is low for the oil, and a hydraulic oil tank is provided to shorten the time required for the temperature of the hydraulic oil in the hydraulic system pipeline to rise during warm-up.

[0005] The utility model provides a technical solution for achieving its purpose: a hydraulic oil tank, comprising a tank body, a heater, and an oil suction pipe; a shell is fixedly installed in the tank body below the oil level, the heater is fixedly installed in the inner cavity of the shell, an oil passage connecting the inside and outside of the shell is provided on the shell, and the oil inlet end of the oil suction pipe is fixedly connected to the shell and communicated with the inner cavity of the shell.

[0006] In the hydraulic oil tank of the utility model, the oil suction pipe is connected to the top of the shell. Further, the other end of the oil suction pipe is connected to the top of the box body.

[0007] In the hydraulic oil tank of the utility model, the shell is suspended above the bottom plate of the box body.

[0008] In the hydraulic oil tank of the utility model, the oil passage comprises a bottom oil passage arranged on the bottom surface of the shell.

[0009] In the hydraulic oil tank of the utility model, the oil passage also includes an upper oil passage arranged at a position higher than the bottom oil passage.

[0010] In the hydraulic oil tank of the utility model, the shell is in a tubular shape, one end of which is fixedly connected to the side wall of the box body and arranged in a horizontal shape.

[0011] In the hydraulic oil tank of the utility model, a sealing plate for sealing the end hole of the shell is arranged at the other end thereof.

[0012] In the hydraulic oil tank of the utility model, the bottom oil passage is composed of a plurality of oil holes.

[0013] In the hydraulic oil tank of the utility model, the shell is in the shape of a circular tube, and the oil through hole is a long hole, the length direction of which is consistent with the length direction of the shell.

[0014] Compared with the prior art, the utility model forms a small space in the shell body which is communicated with the outside. When the heater heats the hydraulic oil, the temperature of the oil in the area can rise rapidly. The hydraulic system sucks oil from the inner cavity of the shell through the oil suction pipe, so that the oil in the hydraulic system pipeline can reach the required temperature faster, thereby improving the warm-up efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a hydraulic oil tank in one example of the utility model.

[0016] Figure 2 It is a structural schematic diagram of the hydraulic oil tank in the second example of the utility model.

[0017] Figure 3 It is a structural schematic diagram of the hydraulic oil tank in the third example of the utility model.

[0018] Parts names and serial numbers in the figure:

[0019] Box body 1, heater 2, oil suction pipe 3, shell body 4, bottom oil passage 41, sealing plate 42, upper oil passage 43. DETAILED DESCRIPTION

[0020] The specific implementation scheme is described below with reference to the accompanying drawings.

[0021] like Figure 1 As shown, the hydraulic oil tank in this embodiment includes a tank body 1, a heater 2, and an oil suction pipe 3; a shell 4 is fixedly installed below the oil level in the tank body 1, the heater 2 is fixedly installed in the inner cavity of the shell 4, and an oil passage connecting the inside and outside of the shell is provided on the shell 4. The oil inlet end of the oil suction pipe 3 is fixedly connected to the shell 4 and communicated with the inner cavity of the shell 4.

[0022] In this embodiment, the inner cavity of the shell 4 forms a regional space. Since the shell 4 changes the constraints on the external flow field of the heater 2, the oil in the region heats up faster than the oil outside the shell. The oil suction pipe 3 sucks oil from the inner cavity of the shell 4, which can first make the oil temperature in the hydraulic system pipeline reach a predetermined value, thereby improving the warm-up efficiency.

[0023] Optionally, the oil suction pipe 3 is connected to the top of the housing 4. Further, the other end of the oil suction pipe 3 is connected to the top of the box 1. The hot oil rises, the oil inlet end of the oil suction pipe 3 is connected to the top of the housing 4, and the oil outlet end is connected to the top of the box, which improves the fluidity of the oil.

[0024] Optionally, the shell 4 is suspended above the bottom plate of the box body 1, and the oil passage includes a bottom oil passage 41 provided on the bottom surface of the shell 4. After the oil in the shell 4 is heated by the heater 2, it naturally flows upward, and the oil at the lower part of the shell 4 enters the shell through the bottom oil passage 41, thereby improving the heating efficiency of the heater 2 for the oil.

[0025] Optionally, the oil passage further includes an upper oil passage 43 disposed at a position higher than the bottom oil passage 41, such as Figure 3 When the heater 2 is working, but the hydraulic system is not working or the oil flow rate of the oil suction pipe 3 is small, the heated oil in the housing 4 can flow out of the housing 4 through the upper oil passage 43 at the upper part of the housing 4, thereby improving the heating efficiency of the heater 2 for the oil.

[0026] Optionally, the housing 4 is tubular, one end of which is fixedly connected to the side wall of the box body 1 and arranged horizontally. The housing 4 of the tubular structure is simple in structure and easy to manufacture.

[0027] Optionally, the other end of the housing is provided with a sealing plate 42 for closing the end hole thereof, such as Figure 2 The upper oil passage 43 may be provided on the sealing plate 42, as shown in FIG. Figure 3 By arranging a sealing plate 42 at the end of the tubular shell 4 and arranging an upper oil passage 43 on the sealing plate 42, the oil passage communicating with the inside and outside of the shell 4 is in a more suitable state, ensuring that the oil in the shell 4 has good fluidity when the heater 2 heats the oil, so that the oil in the shell 4 can well enter the oil suction pipe 3 or have convection exchange with the oil outside the shell 4, thereby improving the heating efficiency.

[0028] Alternatively, if Figures 1 to 3 As shown, the bottom oil passage 41 is composed of a plurality of oil holes. The shell is in a cylindrical shape, and the oil holes constituting the bottom oil passage 41 are long holes, and their length direction is consistent with the length direction of the shell 4.

[0029] In this embodiment, the housing 4 forms a small space in the box body 1 that is connected to the outside of the housing. When the heater 2 heats the hydraulic oil, the temperature of the oil in this area can rise rapidly. The hydraulic system sucks oil from the inner cavity of the housing 4 through the oil suction pipe, which can make the oil in the hydraulic system pipeline reach the required temperature faster. The existence of the housing 4 also improves the flow field of the liquid near the heater 2 in the box body, and improves the efficiency of the heater 2 in heating the hydraulic oil.

Claims

1. A hydraulic oil tank, comprising a tank body, a heater, and an oil suction pipe, characterized in that: A shell is fixedly installed in the box below the oil level, the heater is fixedly installed in the inner cavity of the shell, the shell is provided with an oil passage connecting the inside and outside of the shell, and the oil inlet end of the oil suction pipe is fixedly connected to the shell and connected with the inner cavity of the shell.

2. The hydraulic oil tank according to claim 1, characterized in that: The oil suction pipe is connected to the top of the shell.

3. The hydraulic oil tank according to claim 2, characterized in that: The other end of the oil suction pipe is connected to the top of the box body.

4. The hydraulic oil tank according to any one of claims 1 to 3, characterized in that: The shell is suspended above the bottom plate of the box body.

5. The hydraulic oil tank according to claim 4, characterized in that: The oil passage includes a bottom oil passage arranged on the bottom surface of the shell.

6. The hydraulic oil tank according to claim 5, characterized in that: The oil passage also includes an upper oil passage arranged at a position higher than the bottom oil passage.

7. The hydraulic oil tank according to claim 5 or 6, characterized in that: The shell is in a tubular shape, one end of which is fixedly connected to the side wall of the box body and arranged in a horizontal shape.

8. The hydraulic oil tank according to claim 7, characterized in that: The other end of the shell is provided with a sealing plate for closing the end hole thereof.

9. The hydraulic oil tank according to claim 7, characterized in that: The bottom oil passage is composed of a plurality of oil holes.

10. The hydraulic oil tank according to claim 9, characterized in that: The shell is in the shape of a circular tube, and the oil through hole is a long hole, the length direction of which is consistent with the length direction of the shell.

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