CN-122014695-A - Stepped hydraulic oil tank with long flow passage and three-phase separation method

CN122014695ACN 122014695 ACN122014695 ACN 122014695ACN-122014695-A

Abstract

The invention provides a stepped hydraulic oil tank with a long flow passage and a three-phase separation method, which relate to the technical field of hydraulic pressure, the hydraulic oil tank comprises a stepped hydraulic oil tank with a built-in flow passage combined unit body, a stepped hydraulic oil tank with an external pipeline combined unit body and an integrated hydraulic oil tank, wherein an oil return area, a degassing and impurity removing area and a steady flow area are arranged in the oil tank. In the built-in runner combined unit body, the seventh oil tank unit is the lowest oil tank unit, and the first oil tank unit, the second oil tank unit, the third oil tank unit, the fourth oil tank unit, the fifth oil tank unit and the sixth oil tank unit form an inner ladder oil tank unit. In the external pipeline combined unit body, the twelfth oil tank unit is the lowest oil tank unit, and the eighth oil tank unit, the ninth oil tank unit, the tenth oil tank unit and the eleventh oil tank unit respectively form an outer ladder oil tank unit. The invention has the advantages of miniaturization, high-efficiency heat dissipation, degassing and impurity removal, high space utilization rate and suitability for various volume requirements.

Inventors

ZHAI FUGANG
LI JIAHENG
WANG XIAONAN
ZHAO JINZE
Pan Diwen
YANG YUKUN

Assignees

燕山大学

Dates

Publication Date: 20260512
Application Date: 20260320

Claims (10)

1. A stepped hydraulic oil tank with a long runner comprises an inner stepped oil tank unit and a seventh oil tank unit, and is characterized in that, The inner ladder oil tank unit comprises a first oil tank unit, a second oil tank unit, a third oil tank unit, a fourth oil tank unit, a fifth oil tank unit and a sixth oil tank unit, wherein an arc partition plate and a vertical partition plate are respectively arranged in the second oil tank unit and the third oil tank unit, the arc partition plate comprises an arc section, a horizontal section and an inclined section, a notch of the arc section is positioned at an oil inlet of the oil tank unit, a notch of the inclined section is positioned at an oil outlet of the oil tank unit, the horizontal section is in contact with the lower wall of the oil tank unit, the vertical partition plate is positioned at the inclined section in the second oil tank unit, the vertical partition plate is positioned at the arc section in the third oil tank unit, a vertical partition plate is arranged in the fifth oil tank unit and the sixth oil tank unit, the first oil tank unit is positioned at the first position of the highest oil tank unit in the inner ladder oil tank unit, and the fourth oil tank unit is positioned at the first position of the next ladder oil tank unit in the inner ladder oil tank unit; The first oil tank unit in the inner ladder oil tank unit is sequentially arranged with a fourth oil tank unit, a second oil tank unit and a sixth oil tank unit from the first position to the last position, the second oil tank unit in the inner ladder oil tank unit is sequentially arranged with the fourth oil tank unit, the second oil tank unit, the third oil tank unit and the fifth oil tank unit from the first position to the last position, the inner ladder oil tank unit is arranged with the third oil tank unit from the third oil tank unit, each additional column is added with a second oil tank unit or a third oil tank unit, the second oil tank unit and the third oil tank unit are alternately arranged, the sixth oil tank unit and the fifth oil tank unit are alternately arranged at the last position of each column, and in each column of the inner ladder echelon oil tank units, the second oil tank unit and the third oil tank unit are alternately arranged, and a sixth oil tank unit or a fifth oil tank unit are arranged; The column number expression of the built-in runner combination unit body is as follows: ; wherein a is the volume of a single oil tank unit in the built-in runner combined unit body, and x is the column number of the built-in runner combined unit body; According to the installation position of the oil return pipe and the oil suction pipe in the stepped hydraulic oil tank of the built-in runner combination unit body and the stepped hydraulic oil tank of the external pipeline combination unit body and the oil return flow, the expression of the maximum volume is as follows: ; Wherein c is the inner diameter of the oil return pipe.
2. The stepped hydraulic oil tank with a long runner according to claim 1, wherein in the built-in runner combination unit body, an oil suction pipe is arranged on the left side face of a seventh oil tank unit, an oil filler cap and an air filter are arranged on the upper side face of a first oil tank unit, an oil return pipe is arranged on the left side face of the first oil tank unit, a liquid level meter is arranged on one side face of a second oil tank unit which is highest in each row from a third oil tank unit in an inner stepped oil tank unit, an oil outlet is arranged on the lower side face of the first oil tank unit, an oil inlet and an oil outlet are respectively arranged on the upper side face and the lower side face of a fourth oil tank unit, an oil inlet and an oil outlet are respectively arranged on the upper side face of a fifth oil tank unit and the upper side face of a sixth oil tank unit, an oil inlet and an oil inlet are formed into an inter-row oil port, and the front side faces of the fifth oil tank unit and the sixth oil tank unit are provided with joints.
3. The stepped hydraulic tank with a long flow path according to claim 1, wherein, in the inner-stage echelon tank units, from the third row, if the last position in the previous row is the second tank unit, the last position in the next row is the third tank unit, if the last position in the previous row is the third tank unit, the last position in the next row is the second tank unit, if the last position in the previous row is the fifth tank unit, the last position in the next row is the sixth tank unit, and if the last position in the previous row is the sixth tank unit, the last position in the next row is the fifth tank unit.
4. A three-phase separation method for a stepped hydraulic tank having a long flow passage according to any one of claims 1 to 3, characterized by comprising: The oil enters an oil return area in the first oil tank unit through an oil return pipe on a first oil tank unit in a highest oil tank unit in the inner ladder oil tank units, sequentially flows into a second oil tank unit and a third oil tank unit which are alternately arranged in the same column through an oil outlet on the first oil tank unit, and enters a sixth oil tank unit at the last position in a next highest oil tank unit in the inner ladder echelon oil tank units through a joint on a fifth oil tank unit after passing through a degassing and impurity removing area formed by the second oil tank unit and the third oil tank unit from top to bottom; the oil enters the fourth oil tank unit from the joint of the sixth oil tank unit, repeatedly passes through the degassing and impurity removing area consisting of the second oil tank unit and the third oil tank unit in the next highest oil tank unit, then enters the fifth oil tank unit at the last position in the next highest oil tank unit in the inner-stage echelon oil tank unit in the same way to perform degassing and impurity removing, and the process is repeated until the oil passes through all oil tank units in the inner-stage oil tank unit; The oil enters a steady flow area formed by a seventh oil tank unit from the joint of the lowest oil tank unit in the inner ladder oil tank unit, and leaves the built-in runner combined unit body through the oil suction pipe, so that three-phase separation of the oil is completed.
5. A stepped hydraulic oil tank with a long runner comprises an outer stepped oil tank unit and a twelfth oil tank unit, and is characterized in that, The outer step oil tank unit comprises an eighth oil tank unit, a ninth oil tank unit, a tenth oil tank unit and an eleventh oil tank unit, wherein arc clapboards are arranged in the ninth oil tank unit, the tenth oil tank unit and the eleventh oil tank unit and comprise arc sections, horizontal sections and inclined sections, the inner cambered surfaces of the arc sections are positioned at the lower parts of oil inlets of the oil tank units, the outer cambered surfaces of the arc sections are positioned at the upper parts of oil outlets of the oil tank units, the horizontal sections are positioned on the side walls of the oil tank units and are provided with a certain distance with the lower wall surface, the eighth oil tank unit is positioned at the first position of the highest column in the outer step oil tank unit, and the ninth oil tank unit is positioned at the first position of the secondary step oil tank unit in the outer step oil tank unit; A ninth oil tank unit and an eleventh oil tank unit are sequentially arranged from a first position to a last position in the first oil tank unit of the outer ladder row, a ninth oil tank unit, a tenth oil tank unit and an eleventh oil tank unit are sequentially arranged from the first position to the last position in the second oil tank unit of the outer ladder row, and every row of oil tank units is added from the third oil tank unit of the outer ladder row, then a tenth oil tank unit is added at the next last position of the next row; the column number expression of the external pipeline combination unit body is as follows: ; wherein b is the volume of a single oil tank unit in the external pipeline combined unit body, and y is the column number of the external pipeline combined unit body; according to the installation position of the oil return pipe and the oil suction pipe in the stepped hydraulic oil tank of the external pipeline combined unit body and the oil return flow, the expression of the maximum volume is as follows: ; Wherein c is the inner diameter of the oil return pipe.
6. The stepped hydraulic oil tank with a long runner according to claim 5, wherein an oil suction pipe is arranged on the right side surface of the twelfth oil tank unit in the external pipeline combination unit body, an oil filler cap, an air filter and an oil return pipe are sequentially arranged on the upper side surface of the eighth oil tank unit, and a liquid level meter is arranged on one side surface of each of the eighth oil tank unit and the ninth oil tank unit which are highest from the second row.
7. The stepped hydraulic oil tank with a long runner according to claim 5, wherein in the outer stepped oil tank unit, an oil outlet is provided at a lower side of the eighth oil tank unit, oil inlets and oil outlets are provided at upper and lower sides of the ninth oil tank unit and the tenth oil tank unit, respectively, oil inlets and oil outlets are provided at upper and left sides of the eleventh oil tank unit, respectively, oil inlets are provided at an upper side of the twelfth oil tank unit, and in adjacent two columns of the outer stepped oil tank unit, oil outlets of the eleventh oil tank unit are connected by a hose and oil inlets of the ninth oil tank unit, and oil outlets of the eleventh oil tank unit in a lowest column of the outer stepped oil tank unit are connected by a hose and oil inlets of the twelfth oil tank unit.
8. A three-phase separation method for a stepped hydraulic tank having a long flow passage according to one of claims 5 to 7, characterized by comprising: The oil enters an oil return area in the eighth oil tank unit through an oil return pipe on the eighth oil tank unit in the highest oil tank unit of the outer ladder oil tank unit, sequentially flows into a tenth oil tank unit and an eleventh oil tank unit which are sequentially arranged in the same column through oil outlets on the eighth oil tank unit, and enters an oil inlet of a ninth oil tank unit at the first position in the next highest oil tank unit in the outer ladder oil tank unit through a hose connected with an oil outlet on the eleventh oil tank unit after a flow path passes through a degassing and impurity removing area formed by the tenth oil tank unit and the eleventh oil tank unit which are sequentially connected from top to bottom; The oil enters a ninth oil tank unit in the next highest oil tank unit through a hose, and after passing through a degassing and impurity removing area formed by the ninth oil tank unit, the tenth oil tank unit and the eleventh oil tank unit which are sequentially connected, the oil enters an oil inlet of the ninth oil tank unit at the first position in the next highest oil tank unit in the outer ladder oil tank unit through a hose connected with an oil outlet on the eleventh oil tank unit, and the process is repeated until the oil passes through all oil tank units in the outer ladder oil tank unit; The oil enters a steady flow area formed by the twelfth oil tank unit from the joint of the lowest oil tank unit in the outer ladder oil tank unit, and leaves the external pipeline combined unit body through the oil suction pipe, so that the three-phase separation of the oil is completed.
9. The utility model provides a cascaded hydraulic tank with long runner, a serial communication port, it includes integral type metal casing, the up side of integral type metal casing's third ladder unit is equipped with back oil pipe, filler cap and air cleaner in proper order, the left surface of third ladder unit is equipped with the level gauge, the inside of third ladder unit is equipped with two circular arc baffles that the structure is the same respectively, two circular arc baffles arrange in turn, the inside of integral type metal casing's second ladder unit is equipped with three vertical baffle in turn from top to bottom, the left surface of integral type metal casing's first ladder unit is equipped with inhales oil pipe, third ladder unit, second ladder unit and first ladder unit interconnect's position is equipped with square interface.
10. A three-phase separation method for the stepped hydraulic tank with a long runner according to claim 9, characterized by comprising: the oil enters the third step unit through an oil return pipe of the third step unit of the integrated metal shell, enters the degassing and impurity removing area consisting of the vertical partition plates in the second step unit through a square interface on the third step unit after passing through the degassing and impurity removing area consisting of the circular arc partition plates, enters the steady flow area of the first step unit through a square interface on the second step unit, and leaves the integrated hydraulic oil tank through an oil suction pipe of the first step unit, so that three-phase separation of the oil is completed.

Description

Stepped hydraulic oil tank with long flow passage and three-phase separation method Technical Field The invention relates to the technical field of hydraulic pressure, in particular to a stepped hydraulic oil tank with a long flow passage and a three-phase separation method. Background In the field of factory mechanical equipment, such as mobile hydraulic equipment like automatic guided vehicles and small forklifts, more layout space is reserved for a system as much as possible due to the limitation of the body height and the chassis space, the miniaturization of a hydraulic oil tank is beneficial to reducing the weight of the equipment and reducing the volume so as to improve the maneuverability and the space utilization rate, in the field of agricultural mechanical equipment, such as mobile field operation machines like tractors, rice transplanting machines and sowing machines, the operation width is limited, the internal space is compact, the adoption of the miniaturized hydraulic oil tank can enable the structure to be compact, the space utilization rate, the operation efficiency and the cruising ability to be beneficial to improvement, in the field of engineering mechanical equipment, such as engineering operation machines like loaders, excavators and high-altitude operation platforms, the equipment is required to be small and flexible, the weight distribution of the whole hydraulic oil tank can be optimized, and the maneuverability and the economy of the equipment are improved. However, the internal gas-liquid-solid three-phase separation performance of the hydraulic tank faces serious challenges in meeting the miniaturization requirements. The working medium of the hydraulic system is liquid phase (hydraulic oil), but gas phase (free or dissolved air) and solid phase (abrasion particles, external dust and other impurities) are inevitably mixed in the circulating process. One of the core functions of the tank is to achieve an efficient separation of the three phases. So as to ensure the cleanliness of the working medium of the system and prolong the service life of the working medium. The miniaturized design can cause the defects that firstly, the gas phase separation effect is reduced, the residence time of oil in the tank is shortened due to the reduction of the volume of an oil tank, bubbles are difficult to float up and escape sufficiently, residual air in the oil is caused, cavitation is easy to occur, noise is generated, the system vibration is generated, and the operation stability of a hydraulic system and the service life of elements are influenced. Secondly, the heat dissipation efficiency is low, the oil flow path is shortened, the heat exchange time between the oil and the tank wall is insufficient, the heat is difficult to effectively dissipate, the oil temperature is increased, the viscosity and the lubricating performance of the oil are reduced, and the ageing of the hydraulic element is accelerated. Third, the solid-phase sedimentation effect is limited, the flow channel of the traditional miniaturized oil tank is simple, the oil flow speed is high, the sedimentation time of solid impurities is insufficient, particles are easy to be sucked into the system, abrasion of elements is aggravated, sediment is difficult to clean, and long-term accumulation can block the flow channel or cause corrosion. For example, the labyrinth type hydraulic oil tank disclosed by the utility model can reduce the volume and the mass of the oil tank, increase the heat exchange intensity and improve the heat dissipation effect, but the labyrinth type hydraulic oil tank is a miniaturized oil tank with fixed volume, cannot be changed according to different application scenes, has single application field, overcomes the defect of poor internal pressure bearing capability of the special-shaped hydraulic oil tank disclosed by the utility model, omits the design of a three-phase separation function, and discloses an elastic hydraulic oil tank with constant pressure disclosed by the utility model, but the utility model also does not relate to the separation of three phases. Therefore, the short-flow high-efficiency three-phase separation method suitable for the stepped hydraulic oil tanks in multiple fields is researched, the structure of the hydraulic oil tank is optimized, the oil consumption of a hydraulic system is greatly reduced, and the method is a key for realizing oil saving and emission reduction of the hydraulic system. Disclosure of Invention In order to solve the defects of the prior art, the invention aims to provide a stepped hydraulic oil tank with a long flow passage and a three-phase separation method, wherein in an inner flow passage combined unit body, an arc baffle plate and a vertical baffle plate are respectively arranged in a second oil tank unit and a third oil tank unit, an air and impurity removing area is formed by two adjacent second oil tank units and third oil tank units, an arc baffle