Oil tank and hydraulic system

Abstract

The embodiment of the invention relates to the technical field of hydraulic pressure, and discloses an oil tank and a hydraulic system.The oil tank comprises a tank body, a covering part and a sensor, the tank body is provided with an oil storage cavity and an opening, the opening communicates with the oil storage cavity, and the oil storage cavity is used for storing hydraulic oil; the covering piece is detachably mounted on the box body and covers the opening; the sensor penetrates through the covering piece, at least part of the sensor is contained in the oil storage cavity, and the sensor is used for detecting the hydraulic oil. Through the mode, the probe part of the sensor can be placed in an environment with the same atmospheric pressure and relatively stable temperature for detection, and the influence of great change of pressure and temperature on hydraulic oil detection can be reduced; and the detection reliability and effectiveness can be improved, so that the detection result is more representative.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of hydraulic technology, and in particular to an oil tank and a hydraulic system. Background Art

[0002] The hydraulic system of construction machinery uses hydraulic oil as the power transmission medium. The quality of the hydraulic oil affects the performance of the hydraulic system. Therefore, it is necessary to monitor the hydraulic oil in the hydraulic system, and to effectively control and manage the hydraulic system based on the monitoring data to ensure the normal operation of the hydraulic system.

[0003] In the related art, sensors are usually set on the oil return pipeline of the hydraulic system, and the data of the hydraulic oil, such as viscosity, density, temperature and the like, are collected through the sensors.

[0004] During the implementation of the embodiments of the present application, the inventors found that when the sensor is set on the oil return pipeline, the pressure of the hydraulic oil is large and unstable, which has a huge impact on the sensor test results and is likely to cause damage to the sensor. Summary of the invention

[0005] The main technical problem solved by the embodiments of the present application is to provide an oil tank and a hydraulic system, which can place the probe part of the sensor in an environment with the same atmospheric pressure and relatively stable temperature for detection, thereby reducing the impact of large changes in pressure and temperature on hydraulic oil detection; and can improve detection reliability and effectiveness; and can also test the sensor in a better measurement environment, making the detection results more representative.

[0006] In order to solve the above technical problems, a technical solution adopted in an embodiment of the present application is: providing an oil tank, including a box body, a cover part and a sensor; the box body is provided with an oil storage chamber and an opening, the opening is connected to the oil storage chamber, and the oil storage chamber is used to store hydraulic oil; the cover part is detachably installed on the box body, and the cover part covers the opening; the sensor is inserted into the cover part, and the probe part of the sensor is accommodated in the oil storage chamber, and the sensor is used to detect hydraulic oil.

[0007] In some embodiments, the cover member includes a fixing portion and a protruding portion, the fixing portion is mounted on the box body, the protruding portion is passed through the opening, and the sensor is passed through the protruding portion.

[0008] In some embodiments, the opening is disposed on a first side wall of the box body, and in a first direction, the length of the protrusion is greater than the thickness of the first side wall, and the first direction is perpendicular to the first side wall.

[0009] In some embodiments, the protrusion is provided with a mounting hole, and the sensor is mounted in the mounting hole.

[0010] In some embodiments, the sensor is provided with an external thread, the mounting hole is provided with an internal thread, and the sensor is screwed to the mounting hole.

[0011] In some embodiments, the oil tank further includes a first sealing ring, which is sleeved on the sensor, and in a first direction, one end of the first sealing ring abuts against the sensor, and the other end of the first sealing ring abuts against the protrusion.

[0012] In some embodiments, the oil tank includes a second sealing ring, and along the first direction, the second sealing ring is located between the fixing portion and the first side wall.

[0013] In some embodiments, the fixing portion and the first side wall are fixed by screws.

[0014] In some embodiments, there are multiple screws, and the multiple screws together fix the fixing portion to the first side wall.

[0015] In order to solve the above technical problems, another technical solution adopted in the embodiment of the present application is: to provide a hydraulic system, including the above oil tank.

[0016] The beneficial effects of the embodiments of the present application are as follows: different from the prior art, in the embodiments of the present application, by arranging the sensor on the cover member, the cover member can be detachably installed on the box body, and the probe part of the sensor can be placed in an environment with the same atmospheric pressure and relatively stable temperature for detection, which can reduce the impact of large changes in pressure and temperature on hydraulic oil detection; and can improve the reliability and effectiveness of detection; and can also enable the sensor to be tested in a better measurement environment, so that the detection results are more representative. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0018] Figure 1 is a schematic diagram of the structure of the fuel tank provided in an embodiment of the present application;

[0019] Figure 2 It is a schematic diagram of the structure of the covering member provided in the embodiment of the present application.

[0020] Description of symbols

[0021] 100. Fuel tank;

[0022] 1. box body; 11. oil storage chamber; 12. opening; 13. first side wall; 131. screw groove;

[0023] 2. Covering member; 21. Fixing portion; 211. Through hole; 22. Raised portion; 221. Mounting hole;

[0024] 3. Sensor;

[0025] 4. The first sealing ring;

[0026] 5. Second sealing ring;

[0027] 6. Screws;

[0028] 8. Minimum liquid level; DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element or there can be one or more centered elements therebetween. When an element is described as "connected" to another element, it can be directly connected to another element or there can be one or more centered elements therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. used in this specification is based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0031] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0032] See also Figure 1 and Figure 2The oil tank 100 includes a box body 1, a cover 2 and a sensor 3. The box body 1 is provided with an oil storage chamber 11 and an opening 12. The opening 12 is connected to the oil storage chamber 11. The oil storage chamber 11 is used to store hydraulic oil. The cover 2 is detachably mounted on the box body 1, and the cover 2 covers the opening 12 to reduce the risk of hydraulic oil in the oil storage chamber 11 leaking from the opening 12. As the hydraulic oil is used for a longer time, the impurities in the hydraulic oil increase, resulting in the deposition of impurities in the box body 1. At this time, the inside of the box body 1 needs to be cleaned. By detachably mounting the cover 2 on the box body 1, the cover 2 can be removed when cleaning the box body 1, so as to facilitate the cleaning of the inside of the box body 1. The sensor 3 is mounted on the cover 2, and the sensor 3 passes through the cover 2 so that the probe part of the sensor 3 is accommodated in the oil storage chamber 11, so that the probe part of the sensor 3 can contact the hydraulic oil in the oil storage chamber 11, thereby detecting the hydraulic oil. Among them, the sensor 3 can detect the density, viscosity, temperature and other parameters of the hydraulic oil. Compared with the prior art method of setting the sensor 3 in the return oil pipeline of the hydraulic system, the present application sets the sensor 3 on the cover 2, and the cover 2 can be detachably installed on the box 1. The pressure of the hydraulic oil in contact with the sensor 3 is relatively low. On the one hand, it can reduce the risk of damage to the sealing components inside the sensor 3 under high pressure. On the other hand, the sensor 3 can be tested in a better measurement environment, making the test results more representative.

[0033] It is worth noting that during the operation of the hydraulic system, the temperature of the hydraulic oil in the hydraulic pipeline varies greatly. Therefore, in the prior art, the sensor is set in the return oil pipeline of the hydraulic system. Due to the large temperature difference of the hydraulic oil, it is easy to cause inaccurate detection results. Therefore, in the present application, by setting the sensor 3 on the box 1, and the probe part of the sensor 3 is in contact with the hydraulic oil in the oil storage chamber 11, the hydraulic oil in the box 1 is detected, so that the sensor 3 can be detected in an environment with a relatively stable temperature, which is conducive to improving the accuracy of the detection, and thus making the detection result more representative.

[0034] In some embodiments, the cover 2 includes a fixing portion 21 and a protrusion 22, the fixing portion 21 is mounted on the first side wall 13 of the box body 1, the first opening 12 is provided on the first side wall 13 of the box body 1, the protrusion 22 passes through the opening 12, and at least part of the protrusion 22 is accommodated in the oil storage chamber 11, and the sensor 3 is provided through the protrusion 22, so that the probe part of the sensor 3 is accommodated in the oil storage chamber 11. It is worth noting that the inner wall of the box body 1 has an adsorption effect on the hydraulic oil, so that the inner wall of the box body 1 has a stagnation phenomenon for the flow of the oil, which will cause the local oil on the inner wall to be different from the overall flow state, and usually does not participate in the circulation of the hydraulic system. The area formed by this part of the oil is called the dead oil area F. In this embodiment, the protrusion 22 is passed through the opening 12, and at least a portion of the protrusion 22 is accommodated in the oil storage chamber 11. The sensor 3 is inserted into the protrusion 22 so that the probe portion of the sensor 3 is accommodated in the oil storage chamber 11. This allows the sensor 3 to avoid the dead oil zone F, which is beneficial to improving the accuracy of the parameters measured by the sensor 3.

[0035] In some embodiments, in the first direction X, the length of the protrusion 22 is greater than the thickness of the first side wall 13, so that at least a portion of the protrusion 22 is accommodated in the oil storage cavity 11, making it convenient for the sensor 3 installed on the protrusion 22 to contact the hydraulic oil in the oil storage cavity 11, wherein the first direction X is perpendicular to the first side wall 13.

[0036] In some embodiments, the protrusion 22 is provided with a mounting hole 221, and the sensor 3 is installed in the mounting hole 221 so that the probe part of the sensor 3 protrudes from the mounting hole 221, so that the sensor 3 contacts the hydraulic oil in the oil storage chamber 11, thereby detecting the hydraulic oil in the oil storage chamber 11.

[0037] In some embodiments, the sensor 3 is provided with an external thread (not shown), the mounting hole 221 is provided with an internal thread (not shown), and the sensor 3 is screwed and fixed to the mounting hole 221. In this embodiment, by screwing the sensor 3 to the mounting hole 221, assembly is convenient and the connection is stable.

[0038] In some embodiments, the oil tank 100 includes a first sealing ring 4, which is sleeved on the sensor 3, and along the first direction X, one end of the first sealing ring 4 abuts against the sensor 3, and the other end of the first sealing ring 4 abuts against the protrusion 22. In this embodiment, by providing the first sealing ring 4, the sealing performance between the protrusion 22 and the sensor 3 can be improved, and the risk of the hydraulic oil in the oil storage chamber 11 leaking from the gap between the sensor 3 and the protrusion 22 can be reduced.

[0039] In some embodiments, the oil tank 100 includes a second sealing ring 5, which is sleeved on the raised portion 22, and is located between the fixed portion 21 and the first side wall 13 along the first direction X, with one end of the second sealing ring 5 abutting against the fixed portion 21, and the other end of the second sealing ring 5 abutting against the first side wall 13. In this embodiment, by providing the second sealing ring 5, the sealing performance between the fixed portion 21 and the first side wall 13 can be improved, and the risk of hydraulic oil leaking from the gap between the fixed portion 21 and the first side wall 13 can be reduced.

[0040] In some embodiments, the oil tank 100 further includes screws 6, and the fixing portion 21 is fixed to the first side wall 13 by screws 6. The fixing by screws 6 is simple to assemble and has a stable connection, and can also be disassembled, so that the inside of the box body 1 can be easily cleaned.

[0041] Furthermore, the fixing portion 21 is provided with a through hole 211 , and the first side wall 13 is provided with a screw groove 131 . The screw 6 passes through the through hole 211 and is screwed into the screw groove 131 , thereby fixing the fixing portion 21 to the first side wall 13 .

[0042] In some embodiments, there are multiple screws 6, the fixing portion 21 is provided with multiple through holes 211, the multiple through holes 211 are spaced apart in a circumferential shape, the first side wall 13 is provided with multiple screw grooves 131, one through hole 211 corresponds to one screw groove 131, and one screw 6 passes through one through hole 211 and is screwed to one screw groove 131. In this embodiment, by providing multiple screws 6 to fix the fixing portion 21 to the first side wall 13, the stability of the fixation between the fixing portion 21 and the first side wall 13 can be improved.

[0043] In some embodiments, the portion of the sensor 3 accommodated in the oil storage chamber 11 is located below the lowest liquid level 8 in the oil storage chamber 11, wherein the lowest liquid level 8 refers to the plane where the liquid level of the hydraulic oil is located when the hydraulic system can work normally and the amount of hydraulic oil that needs to be stored in the oil tank 100 is the least, i.e., the lowest liquid level 8. By locating the portion of the sensor 3 accommodated in the oil storage chamber 11 below the lowest liquid level 8 in the oil storage chamber 11, even if the hydraulic oil in the oil tank 100 is the least, the sensor 3 can contact the hydraulic oil, thereby detecting the parameters of the hydraulic oil.

[0044] In the embodiment of the present application, by arranging the sensor 3 on the cover 2, the cover 2 can be detachably installed on the box 1, and the probe part of the sensor 3 can be placed in an environment with the same pressure as the atmospheric pressure and relatively stable temperature for detection, which can reduce the impact of large changes in pressure and temperature on the hydraulic oil detection results; and can improve the detection reliability and effectiveness; and can also enable the sensor to be tested in a better measurement environment, so that the detection results are more representative.

[0045] The present application also provides a hydraulic system embodiment, the hydraulic system includes the above-mentioned oil tank, and the specific structure and function of the oil tank can be referred to the above-mentioned embodiment, which will not be described one by one here.

[0046] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A fuel tank, characterized in that: include: The box body is provided with an oil storage cavity and an opening, wherein the opening is communicated with the oil storage cavity, and the oil storage cavity is used to store hydraulic oil; A cover member, which is detachably mounted on the box body and covers the opening; A sensor is inserted through the cover member, and a probe portion of the sensor is accommodated in the oil storage cavity. The sensor is used to detect the hydraulic oil.

2. The fuel tank according to claim 1, characterized in that: The cover member comprises a fixing portion and a protruding portion, wherein the fixing portion is mounted on the box body, the protruding portion is passed through the opening, and the sensor is passed through the protruding portion.

3. The fuel tank according to claim 2, characterized in that: The opening is disposed on a first side wall of the box body, and in a first direction, the length of the protrusion is greater than the thickness of the first side wall, and the first direction is perpendicular to the first side wall.

4. The fuel tank according to claim 2, characterized in that: The protrusion is provided with a mounting hole, and the sensor is mounted in the mounting hole.

5. The fuel tank according to claim 4, characterized in that: The sensor is provided with an external thread, the mounting hole is provided with an internal thread, and the sensor is screwed to the mounting hole.

6. The fuel tank according to claim 4, characterized in that: The oil tank further includes a first sealing ring, which is sleeved on the sensor, and in a first direction, one end of the first sealing ring abuts against the sensor, and the other end of the first sealing ring abuts against the protruding portion.

7. The fuel tank according to claim 3, characterized in that: The oil tank comprises a second sealing ring, and along the first direction, the second sealing ring is located between the fixing portion and the first side wall.

8. The fuel tank according to claim 3, characterized in that: The fixing portion is fixed to the first side wall by screws.

9. The fuel tank according to claim 8, characterized in that There are multiple screws, and the multiple screws together fix the fixing portion to the first side wall.

10. A hydraulic system, characterized in that: Comprising the oil tank as claimed in any one of claims 1-9.

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