阅读说明：本技术 液位油温自平衡式组合油箱 (Liquid level oil temperature self-balancing type combined oil tank ) 是由 张景胜 张伟 孙丰迎 解瑞江 于 2020-07-10 设计创作，主要内容包括：本发明液位油温自平衡式组合油箱,涉及两油箱液位油温平衡技术领域,尤其涉及具有液位油温自平衡功能的组合式油箱。本发明是将两系统油箱合二为一,子油箱设置在主油箱的内部；并且子油箱与主油箱共用一侧箱壁,子油箱将主油箱分割成为C型结构；带滤网隔板设置在主油箱的C型结构中部,将主油箱分割为常温净油区和高温污油区；主油箱与子油箱上还装有主油箱系统、主油箱液位系统、主油箱循环过滤冷却系统、子油箱系统、子油箱液位系统和主油箱与子油箱间可调压力单向阀连通系统；本发明的技术方案解决了现有技术中两油箱仅能单向转移,且需要外部电控系统对液位平衡装置进行控制及子油箱需单独循环过滤冷却系统的问题。(The invention discloses a combined oil tank with a self-balancing liquid level and oil temperature function, relates to the technical field of liquid level and oil temperature balance of two oil tanks, and particularly relates to a combined oil tank with a self-balancing liquid level and oil temperature function. The invention combines two system oil tanks into one, and the sub oil tank is arranged in the main oil tank; the sub oil tank and the main oil tank share one side of tank wall, and the sub oil tank divides the main oil tank into C-shaped structures; the partition plate with the filter screen is arranged in the middle of the C-shaped structure of the main oil tank, and the main oil tank is divided into a normal-temperature oil purification area and a high-temperature dirty oil area; the main oil tank and the sub oil tanks are also provided with a main oil tank system, a main oil tank liquid level system, a main oil tank circulating filtering and cooling system, a sub oil tank liquid level system and an adjustable pressure one-way valve communication system between the main oil tank and the sub oil tanks; the technical scheme of the invention solves the problems that two oil tanks can only transfer in one direction, an external electric control system is required to control the liquid level balancing device, and the oil tanks need to be separately circulated, filtered and cooled in the prior art.)

1. The utility model provides a liquid level oil temperature self-balancing formula combination oil tank, its characterized in that, liquid level oil temperature self-balancing formula combination oil tank unite two into one two system oil tanks, include: the system comprises a main oil tank (A), a sub-oil tank (B), a partition plate (C) with a filter screen, a main oil tank system, a main oil tank liquid level system, a main oil tank circulating filtration cooling system, a sub-oil tank liquid level system and a pressure-adjustable one-way valve communication system between the main oil tank and the sub-oil tank;

the sub oil tank (B) is arranged inside the main oil tank (A); the sub oil tank (B) and the main oil tank (A) share one side of the tank wall, and the sub oil tank (B) divides the main oil tank (A) into C-shaped structures;

the partition plate (C) with the filter screen is arranged in the middle of the C-shaped structure of the main oil tank (A), and the main oil tank (A) is divided into a normal-temperature oil purification area and a high-temperature oil pollution area;

the main oil tank system is a hydraulic system which utilizes oil in the main oil tank and is connected to an oil suction port (A1) of the main oil tank, an oil return port (A21) of the main oil tank and an oil drainage port (A22) of the main oil tank through pipelines; the main oil tank oil suction opening (A1) is arranged outside the side wall at one end of the clean oil area of the main oil tank (A); the main oil tank oil return port (A21) and the main oil tank oil drain port (A22) are arranged at the upper part of the tank body at one end of the dirty oil area of the main oil tank (A), and the oil return pipe is directly inserted below the liquid level;

the main oil tank liquid level system is a liquid level meter, and a main oil tank liquid level meter interface 1(A3) and a main oil tank liquid level meter interface 2(A4) are respectively arranged at the upper part and the lower part of the outer side of the tank wall of a main oil tank (A) oil purification area;

main oil tank loop filter cooling system be through the pump from the oil absorption of main oil tank, then the rethread filter, the cooler with the one set of device that conveys back main oil tank behind the fluid filtration cooling, include: an oil suction port (A5) of the main oil tank circulating filtering cooling device and an oil return port (A6) of the main oil tank circulating filtering cooling device; the main oil tank circulating filtering cooling device oil suction port (A5) is arranged at the outer position of the side wall at one end of the dirty oil area of the main oil tank (A) and is arranged between the main oil tank oil return port (A2) and the main oil tank circulating filtering cooling device oil return port (A6); an oil return port (A6) of the main oil tank circulating filtering cooling device is arranged at the upper part of a tank body at one end of a clean oil area of the main oil tank (A), and an oil return pipe is directly inserted below the liquid level;

the oil tank system is a hydraulic system utilizing oil in the oil tank and comprises a system oil filter; the sub-oil tank system is connected to a sub-oil tank oil suction port (B1), a sub-oil tank oil return port (B21) and a sub-oil tank oil drain port (B22) through pipelines; the sub-oil tank oil suction port (B1) is arranged on the outer wall of the main oil tank (A), and the oil suction pipe penetrates through the main oil tank (A) and is inserted into the sub-oil tank (B); the oil return port (B21) and the oil drain port (B22) of the sub oil tank are positioned at the top of the sub oil tank (B), and penetrate through the top plate of the sub oil tank (B) at one end far away from the oil suction port (B1) of the sub oil tank and are inserted below the liquid level of the sub oil tank;

the sub-oil tank liquid level system is a liquid level meter, and an interface 1(B3) and an interface 2(B4) of the sub-oil tank liquid level meter are respectively arranged at the upper part and the lower part of the outer side of the tank wall of the sub-oil tank (B);

the adjustable pressure check valve communicating system between the main oil tank and the sub oil tank comprises: the inlet of the pressure-adjustable one-way valve is connected with the inside of the main oil tank (A) through a pipe, and the outlet of the pressure-adjustable one-way valve is connected with the inside of the sub oil tank (B) through a pipe; a connector (A7) connected with the check valve on the main oil tank is arranged on the outer wall of the main oil tank (A) and is communicated with oil liquid in the main oil tank; the interface (B5) connected with the check valve on the sub oil tank is arranged on the outer wall of the main oil tank (A) and is communicated with the oil liquid in the sub oil tank (B) through the main oil tank (A) and the sub oil tank (B).

2. The combined oil tank with the liquid level and the oil temperature being self-balanced as claimed in claim 1, wherein the main oil tank (A) and the sub oil tank (B) share a partition (D); the clapboard (D) consists of a diversion type heat transfer clapboard (D1) and a common clapboard (D2); the partition plate (D) between the main oil tank oil return port (A21) and the sub oil tank oil return port (B21) is a common partition plate (D2), and the other parts are diversion type heat transfer partition plates (D1); the diversion type heat transfer baffle (D1) is of a wave-shaped plate-shaped structure.

3. The combined oil tank with the liquid level and the oil temperature being self-balanced as claimed in claim 1, wherein a sub-oil tank overflow port (B6) is further arranged on the sub-oil tank (B), and the height of the sub-oil tank overflow port (B6) is the highest control liquid level of the sub-oil tank; the outlet end of the sub-oil tank overflow port (B6) is positioned in the main oil tank (A).

4. The combined oil tank with the liquid level and the oil temperature being self-balanced as claimed in claim 3, wherein the main oil tank (A) and the sub oil tank (B) realize no-pump-source and no-electric-control oil-liquid transfer through a sub oil tank overflow port (B6) and a check valve (E) with adjustable opening pressure and connected with the main oil tank and the sub oil tank, and finally achieve self-balancing of the liquid level and the oil temperature; the height of a partition plate (D) between the main oil tank (A) and the sub oil tank (B) and the height of a sub oil tank overflow port (B6) are higher than the liquid level when the oil in the main oil tank system and the sub oil tank system completely returns to the main oil tank (A); when the level of the sub-system oil tank exceeds the highest control level of the sub-oil tank, transferring redundant oil from the sub-oil tank (B) to the main oil tank (A) through a sub-oil tank overflow port (B6); when the pressure difference generated by the liquid level of the main oil tank (A) is higher than the liquid level of the sub oil tank (B) and is larger than the set opening pressure of the one-way valve (E) with adjustable opening pressure connected with the main oil tank and the sub oil tank, the one-way valve (E) with adjustable opening pressure connected with the main oil tank and the sub oil tank is automatically opened, the oil liquid of the main oil tank (A) flows to the sub oil tank (B), and when the pressure difference generated by the liquid level of the main oil tank (A) is higher than the liquid level of the sub oil tank (B) and is lower than the set closing pressure of the one-way valve (E) with adjustable opening pressure connected with the main oil tank and the sub oil tank, the one-way valve (E).

5. The combined oil tank with self-balancing liquid level oil temperature as claimed in claim 4, wherein when the main oil tank system is in operation and the main oil tank circulating filter cooling system is in operation, the oil in the main oil tank (A) flows to the main oil tank suction port (A1) from the main oil tank circulating filter cooling device oil return port (A6), and flows to the main oil tank circulating filter cooling device oil suction port (A5) from the main oil tank circulating filter cooling device oil return port (A6); when the sub-oil tank system works, the oil in the sub-oil tank (B) flows to the sub-oil tank suction port (B1) from the sub-oil tank return port (B21) and the sub-oil tank oil drain port (B22);

in the convection process of oil in the main oil tank and the sub oil tank, heat exchange between the two oil tanks can be realized through a diversion type heat transfer partition plate (D1), and return oil hot oil of the sub oil tank (B) is cooled to the temperature of the oil cooled by a main oil tank circulating filtration cooling system in an oil purification area of the main oil tank (A); the diversion type heat transfer clapboard (D1) is of a wave-shaped plate-shaped structure, so that the heat transfer area can be increased.

Technical Field

The invention discloses a combined oil tank with a self-balancing liquid level and oil temperature function, relates to the technical field of liquid level and oil temperature balance of two oil tanks, and particularly relates to a combined oil tank with a self-balancing liquid level and oil temperature function. The invention is especially suitable for the occasions that the main system and the subsystem have the same medium, the oil precision requirements are different, and the oil tank liquid levels of the main system and the subsystem need to be kept balanced within a certain range.

Background

In an actual engineering project, a hydraulic control system of certain mechanical equipment is often formed by a main system and a sub-system, wherein the main system supplies oil to a main valve of the whole hydraulic control system to meet the flow requirement of the action of an actuating mechanism of the mechanical equipment, and the sub-system supplies pilot control oil and part of loop oil to the main valve in the hydraulic control system. The two systems have different requirements on the cleanliness of oil, and the requirements of general subsystems are higher. The main system hydraulic station and the sub system hydraulic station are usually designed separately as two relatively independent oil supply devices. Because of a small amount of internal leakage between the main valve and the pilot valve, the two sets of systems often have unbalanced liquid levels of the two oil tanks in the operation process, and therefore, equipment needs to be independently equipped to realize oil transfer between the two oil tanks. In addition, the main system and the sub-systems need to be respectively provided with a circulating filtration cooling system, and oil transfer equipment needs to be added between the main system and the sub-systems to realize oil transfer between the two systems, so that the initial investment of the equipment is high, the occupied area of the equipment is large, and the leakage points and the failure rate of the equipment are more. In actual use, frequent on-off of oil transfer equipment between two oil tanks is found, and the reliability of the equipment is reduced.

At present, the latest liquid level balancing devices are the application numbers: 201320668815.8, the patent names: a liquid level balancing device. Two oil tanks are two solitary monomer equipment in this patent, and the fluid transfer between the equipment needs to pass through liquid level balancing unit, and the device only can realize one-way transfer, and extra needs outside electrical system to control liquid level balancing unit.

Aiming at the problems in the prior art and the using process, a novel combined oil tank with the liquid level and the oil temperature in a self-balancing mode is researched and designed, so that the problems in the prior art and the using process are very necessary to overcome.

Disclosure of Invention

According to the technical problems that in the prior art, two oil tanks can only transfer in one direction, an external electric control system is needed to control a liquid level balancing device and the like, the liquid level oil temperature self-balancing combined oil tank is provided. The invention mainly utilizes two oil tanks to be combined into one, can realize the bidirectional transfer of oil between the two oil tanks, has no pump source and no electric valve in the oil transfer process, and realizes the purpose of automatically balancing the liquid level and the oil temperature without electric control; meanwhile, the oil in the flow-guiding heat transfer partition plate and the two oil tanks flows, high-temperature return oil heat of the sub oil tanks is taken away by the oil in the main oil tank, the purpose of self-balancing of the oil temperature in the combined oil tank is achieved, and only the main oil tank is required to be provided with a circulating filtering and cooling system, so that the circulating filtering and cooling system of the sub oil tanks is saved.

The technical means adopted by the invention are as follows:

a liquid level oil temperature self-balancing type combined oil tank integrates two system oil tanks into one, and comprises: the main oil tank, the sub oil tanks, the partition plate with the filter screen, the main oil tank system, the main oil tank liquid level system, the main oil tank circulating filtration cooling system, the sub oil tank liquid level system and the pressure-adjustable one-way valve communication system between the main oil tank and the sub oil tanks;

further, the sub oil tank is arranged inside the main oil tank; the sub oil tank and the main oil tank share one side of tank wall, and the sub oil tank divides the main oil tank into C-shaped structures;

furthermore, the partition plate with the filter screen is arranged in the middle of the C-shaped structure of the main oil tank, and the main oil tank is divided into a normal-temperature oil purification area and a high-temperature oil pollution area;

furthermore, the main oil tank system is a hydraulic system utilizing oil in the main oil tank and is connected to an oil suction port of the main oil tank, an oil return port of the main oil tank and an oil drainage port of the main oil tank through pipelines; the main oil tank oil suction port is arranged outside the side wall at one end of the main oil tank oil purification area; the oil return port of the main oil tank and the oil discharge port of the main oil tank are arranged at the upper part of the tank body at one end of the sump oil area of the main oil tank, and the oil return pipe is directly inserted below the liquid level;

furthermore, a main oil tank liquid level system, namely a liquid level meter, wherein a main oil tank liquid level meter interface 1 and a main oil tank liquid level meter interface 2 are respectively arranged at the upper part and the lower part of the outer side of the tank wall of the main oil tank oil purification area;

further, main oil tank circulation filtration cooling system is through the pump from the oil absorption of main oil tank, then the rethread filter, the cooler with the oil filtration cooling after transmit back to the one set of device of main oil tank, include: an oil suction port of the main oil tank circulating filtering cooling device and an oil return port of the main oil tank circulating filtering cooling device; an oil suction port of the main oil tank circulating filtering and cooling device is arranged at the outer position of the side wall at one end of a dirty oil area of the main oil tank and is arranged between an oil return port of the main oil tank and an oil return port of the main oil tank circulating filtering and cooling device; the oil return port of the main oil tank circulating filtering cooling device is arranged at the upper part of the tank body at one end of the clean oil area of the main oil tank, and the oil return pipe is directly inserted below the liquid level;

further, the oil tank system is a hydraulic system utilizing oil in the oil tank, and comprises a system oil filter; the sub-oil tank system is connected to the oil suction port of the sub-oil tank, the oil return port of the sub-oil tank and the oil drainage port of the sub-oil tank through pipelines; the oil suction port of the oil tank is arranged on the outer wall of the main oil tank, and the oil suction pipe penetrates through the main oil tank and is inserted into the oil tank; the oil return port and the oil drain port of the sub-oil tank are positioned at the top of the sub-oil tank, and penetrate through the top plate of the sub-oil tank at one end far away from the oil suction port of the sub-oil tank and are inserted below the liquid level of the sub-oil tank;

furthermore, a sub-oil tank liquid level system, namely a liquid level meter, wherein a sub-oil tank liquid level meter interface 1 and a sub-oil tank liquid level meter interface 2 are respectively arranged at the upper part and the lower part of the outer side of the tank wall of the sub-oil tank;

further, the adjustable pressure check valve intercommunication system between main oil tank and the sub-oil tank includes: the inlet of the pressure-adjustable one-way valve is connected with the inside of the main oil tank through a pipe, and the outlet of the pressure-adjustable one-way valve is connected with the inside of the sub oil tank through a pipe; the interface on the main oil tank, which is connected with the one-way valve, is arranged on the outer wall of the main oil tank and is communicated with the oil in the main oil tank; the interface on the sub oil tank connected with the one-way valve is arranged on the outer wall of the main oil tank and is communicated with the oil in the sub oil tank through the main oil tank and the sub oil tank;

further, the main oil tank and the sub oil tank share a partition plate; the clapboard consists of a diversion type heat transfer clapboard and a common clapboard; the partition plate between the oil return port of the main oil tank and the oil return port of the sub oil tank is a common partition plate, and the other parts are diversion type heat transfer partition plates. The diversion type heat transfer clapboard is of a wave-shaped plate-shaped structure.

Furthermore, a sub-oil tank overflow port is also arranged on the sub-oil tank, and the height of the sub-oil tank overflow port is the highest control liquid level of the sub-oil tank. The outlet end of the overflow port of the sub oil tank is positioned in the main oil tank.

Furthermore, the main oil tank and the sub oil tank realize pump source-free and electric-control-free oil-liquid transfer through the sub oil tank overflow port and the check valve with adjustable opening pressure connected with the main oil tank and the sub oil tank, and finally achieve self-balance of liquid level and oil temperature; the height of the partition plate between the main oil tank and the sub oil tank and the height of the overflow port of the sub oil tank are both higher than the liquid level when the oil in the main oil tank system and the oil in the sub oil tank system completely returns to the main oil tank; when the liquid level of the sub-system oil tank exceeds the highest control liquid level of the sub-oil tank, transferring redundant oil from the sub-oil tank to the main oil tank through an overflow port of the sub-oil tank; when the pressure difference generated by the liquid level of the main oil tank is higher than the liquid level of the sub oil tank and is larger than the opening pressure regulated by the adjustable opening pressure check valve connected with the main oil tank and the sub oil tank, the adjustable opening pressure check valve connected with the main oil tank and the sub oil tank is automatically opened, the oil in the main oil tank flows to the sub oil tank, and the adjustable opening pressure check valve connected with the main oil tank and the sub oil tank is closed when the pressure difference generated by the liquid level of the main oil tank is higher than the liquid level of the sub oil tank and is lower than the opening pressure regulated closing pressure regulated by the adjustable opening pressure check valve connected with the main oil.

Further, when the main oil tank system works and the main oil tank circulating filtering cooling system works, the oil in the main oil tank flows to the oil inlet from the oil return port of the main oil tank circulating filtering cooling device and the oil inlet from the oil return port of the main oil tank circulating filtering cooling device; when the sub-oil tank system works, the oil in the sub-oil tank flows to the oil suction port from the oil return port of the sub-oil tank and the oil drainage port of the sub-oil tank;

furthermore, in the convection process of the oil in the main oil tank and the sub oil tank, heat exchange between the two oil tanks can be realized through the diversion type heat transfer partition plate, and the return oil hot oil of the sub oil tank is cooled to the oil temperature of the oil cooled by the main oil tank circulating filtering cooling system in the main oil tank oil purification area. The diversion type heat transfer partition is of a wave-shaped plate-shaped structure, so that the heat transfer area can be increased.

Compared with the prior art, the invention has the following advantages:

1. the liquid level oil temperature self-balancing combined oil tank provided by the invention combines two oil tanks into one, so that the floor area of equipment is reduced;

2. compared with the existing two-oil-tank liquid level adjusting system, the combined oil tank provided by the invention can realize the liquid level self-balance between the two oil tanks without a pump source, an electric valve and an electric control system for carrying out oil liquid conveying between the two oil tanks;

3. according to the liquid level and oil temperature self-balancing combined oil tank, the main oil tank circulating filtering and cooling device can cool oil in the main system, meanwhile, heat of the subsystems is taken away through the convection heat exchange effect of the oil on two sides of the flow-guiding type heat transfer partition plate between the sub oil tanks and the main oil tank, and the sub systems are cooled to a certain extent; in practical use, the subsystem cooling device can be eliminated by reasonably configuring system parameters or adding a C-shaped structure.

In conclusion, the technical scheme of the invention solves the problems that two oil tanks in the prior art can only transfer in one direction, an external electric control system is required to control the liquid level balancing device, and the oil tanks need to be provided with a separate circulating filtering cooling system.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of a hidden structure of an upper top plate of a combined fuel tank according to the present invention;

fig. 2 is a schematic diagram of a liquid level oil temperature self-balancing combined oil tank system of the invention.

In the figure: A. main oil tank B, sub-oil tank C, partition D1 with filter screen, flow-guiding heat-transfer partition D2, common partition E, one-way valve with adjustable opening pressure and connected with main oil tank and sub-oil tank

A1, a main oil tank oil suction port A21, a main oil tank oil return port A22, a main oil tank oil drainage port A3, a main oil tank liquid level meter interface 1A 4, a main oil tank liquid level meter interface 2A 5, a main oil tank circulating filtering and cooling device oil suction port A6, a main oil tank circulating filtering and cooling device oil return port A7, and an interface connected with a one-way valve on a main oil tank

B1, a sub-tank oil suction port B21, a sub-tank oil return port B22, a sub-tank oil drain port B3, a sub-tank liquid level meter interface 1B 4, a sub-tank liquid level meter interface 2B 5, an interface B6 connected with a one-way valve on the sub-tank, and a sub-tank overflow port.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

As shown in fig. 1 and 2, the present invention provides a combined oil tank with self-balancing liquid level and oil temperature, which combines two oil tanks into one, and comprises: the system comprises a main oil tank A, a sub oil tank B, a partition plate C with a filter screen, a main oil tank system, a main oil tank liquid level system, a main oil tank circulating filtration cooling system, a sub oil tank liquid level system and an adjustable pressure one-way valve communication system between the main oil tank and the sub oil tank;

the sub oil tank B is arranged inside the main oil tank A; the sub-oil tank B and the main oil tank A share one side of tank wall, and the sub-oil tank B divides the main oil tank A into C-shaped structures;

the partition plate C with the filter screen is arranged in the middle of the C-shaped structure of the main oil tank A, and the main oil tank A is divided into a normal-temperature oil purification area and a high-temperature oil pollution area;

the main oil tank system is a hydraulic system utilizing oil in the main oil tank and is connected to a main oil tank oil suction port A1, a main oil tank oil return port A21 and a main oil tank oil discharge port A22 through pipelines; the main oil tank oil suction port A1 is arranged outside the side wall at one end of the clean oil area of the main oil tank A; the oil return port A21 and the oil drain port A22 of the main oil tank are arranged at the upper part of the tank body at one end of the dirty oil area of the main oil tank A, and the oil return pipe is directly inserted below the liquid level;

the main oil tank liquid level system is a liquid level meter, and a main oil tank liquid level meter interface 1A3 and a main oil tank liquid level meter interface 2A4 are respectively arranged at the upper part and the lower part of the outer side of the tank wall of a main oil tank A oil purification area;

main oil tank loop filter cooling system is through the pump from the oil absorption of main oil tank, then the rethread filter, the cooler with fluid filtration cooling after transmit back to the one set of device of main oil tank, include: an oil suction port A5 of the main oil tank circulating filtering cooling device and an oil return port A6 of the main oil tank circulating filtering cooling device; the main oil tank circulation filtering cooling device oil suction port A5 is arranged at the outer position of the side wall at one end of the dirty oil area of the main oil tank A and is arranged between the main oil tank oil return port A2 and the main oil tank circulation filtering cooling device oil return port A6; an oil return port A6 of the main oil tank circulation filtering cooling device is arranged at the upper part of the tank body at one end of a clean oil area A of the main oil tank, and an oil return pipe is directly inserted below the liquid level;

the sub-oil tank system is a hydraulic system utilizing sub-oil tank oil and comprises a system oil filter; the sub-oil tank system is connected to a sub-oil tank oil suction port B1, a sub-oil tank oil return port B21 and a sub-oil tank oil drain port B22 through pipelines; the sub-oil tank oil suction port B1 is arranged on the outer wall of the main oil tank A, and the oil suction pipe penetrates through the main oil tank A and is inserted into the sub-oil tank B; the sub-oil tank oil return port B21 and the sub-oil tank oil drain port B22 are positioned at the top of the sub-oil tank B, and penetrate through the top plate of the sub-oil tank B at one end far away from the sub-oil tank oil suction port B1 to be inserted below the liquid level of the sub-oil tank;

the sub-oil tank liquid level system is a liquid level meter, and a sub-oil tank liquid level meter interface 1B3 and a sub-oil tank liquid level meter interface 2B4 are respectively arranged at the upper part and the lower part of the outer side of the tank wall of the sub-oil tank B;

adjustable pressure check valve intercommunication system includes between main tank and sub-tank: the inlet of the pressure-adjustable one-way valve is connected with the inside of the main oil tank A through a pipe, and the outlet of the pressure-adjustable one-way valve is connected with the inside of the sub-oil tank B through a pipe; a port A7 connected with the check valve on the main oil tank is arranged on the outer wall of the main oil tank A and is communicated with the oil in the main oil tank; the interface B5 connected with the check valve on the sub oil tank is arranged on the outer wall of the main oil tank A and is communicated with the oil liquid in the sub oil tank B through the main oil tank A and the sub oil tank B;

the main oil tank A and the sub oil tank B share a partition plate D; the partition plate D consists of a diversion type heat transfer partition plate D1 and a common partition plate D2; the partition D between the main oil tank return port A21 and the sub oil tank return port B21 is a common partition D2, and the other parts are diversion type heat transfer partitions D1. The diversion type heat transfer partition plate D1 is of a wave-shaped plate-shaped structure.

The sub-oil tank B is also provided with a sub-oil tank overflow port B6, and the height of the sub-oil tank overflow port B6 is the highest control liquid level of the sub-oil tank. The outlet end of the sub-tank overflow port B6 is located in the main tank A.

The main oil tank A and the sub oil tank B realize the transfer of oil liquid without pump source and electric control through the sub oil tank overflow port B6 and the check valve E with adjustable opening pressure connected with the main oil tank and the sub oil tank, and finally achieve the self-balance of liquid level and oil temperature; the height of a partition plate D between the main oil tank A and the sub oil tank B and the height of a sub oil tank overflow port B6 are both higher than the liquid level when the oil in the main oil tank system and the sub oil tank system completely returns to the main oil tank A; when the liquid level of the sub-system oil tank exceeds the highest control liquid level of the sub-oil tank, transferring redundant oil from the sub-oil tank B to the main oil tank A through a sub-oil tank overflow port B6; when the pressure difference generated by the liquid level of the main oil tank A is higher than the liquid level of the sub oil tank B and is larger than the set opening pressure of the one-way valve E with adjustable opening pressure connected with the main oil tank and the sub oil tank, the one-way valve E with adjustable opening pressure connected with the main oil tank and the sub oil tank is automatically opened, the oil in the main oil tank A flows to the sub oil tank B, and the one-way valve E with adjustable opening pressure connected with the main oil tank and the sub oil tank is closed until the pressure difference generated by the liquid level of the main oil tank A is higher than the liquid level of the sub oil tank B and is lower than the set closing pressure of the one-way valve E with.

When the main oil tank system works and the main oil tank circulating filtering cooling system works, the oil in the main oil tank A flows to the oil return port A6 of the main oil tank circulating filtering cooling device to the oil suction port A1 of the main oil tank, and flows to the oil suction port A5 of the main oil tank circulating filtering cooling device from the oil return port A6 of the main oil tank circulating filtering cooling device; when the sub-tank system works, the oil in the sub-tank B flows to the oil suction port B1 from the oil return port B21 of the sub-tank and the oil drainage port B22 of the sub-tank;

in the convection process of oil in the main oil tank and the sub-oil tank, heat exchange between the two oil tanks can be realized through the diversion type heat transfer partition plate D1, and return oil hot oil of the sub-oil tank B is cooled to the oil temperature of the oil cooled by the main oil tank circulating filtering cooling system in the clean oil area of the main oil tank A. The diversion type heat transfer partition plate D1 is of a wave-shaped plate-shaped structure, and the heat transfer area can be increased.