An automatic compensation and balancing component for oil tank internal pressure to prevent tank body cracking

Abstract

The present invention discloses an automatic compensating balancing component for preventing the cracking of the tank body, comprising a hydraulic oil tank, a cavity for accommodating hydraulic oil in the hydraulic oil tank, an automatic compensating balancing component for cooperating with the hydraulic oil tank, and two automatic compensating balancing units, the two automatic compensating balancing units being divided into an oil inlet end balancing unit and an oil outlet end balancing unit, the oil inlet end balancing unit being used to dock with an oil inlet pipe and complete the input of the hydraulic oil in the hydraulic oil tank, and the oil outlet end balancing unit being used to dock with an oil outlet pipe and complete the output of the hydraulic oil in the hydraulic oil tank. The present invention utilizes the automatic compensating balancing component to realize real-time air pressure regulation during the circulation of hydraulic oil in the hydraulic oil tank, thereby avoiding the expansion and contraction movement of the hydraulic oil tank, prolonging the service life of the hydraulic oil tank, and reducing fatigue wear.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic boxes, and in particular to an automatic compensation and balancing component for the internal pressure of an oil tank for preventing the box body from cracking. Background Art

[0002] The main function of the hydraulic oil tank is to store the oil of the hydraulic system working cycle, dissipate part of the heat generated by the system, separate the air mixed in the oil, and eliminate the foam in the circulating hydraulic oil. Because the hydraulic oil tank is used to store hydraulic oil and needs to realize the supply of circulating hydraulic oil, the hydraulic oil tank is basically a closed space. Usually, the internal air pressure is released to the outside world through a breathing valve or a pressure relief valve to avoid excessive internal pressure in the hydraulic oil tank. However, the breathing valve or pressure relief valve configured in the traditional hydraulic oil tank needs to reach a certain threshold before the internal pressure will be relieved or replenished, usually mainly for pressure relief. However, the amount of the entire hydraulic system in the oil tank is not fixed, but changes at any time with the working status, resulting in the air pressure in the hydraulic oil tank being in a certain amount of negative pressure state or a certain amount of overpressure state. It has a floating value of air pressure, which makes the hydraulic oil tank like a human lung or can inhale or exhale. However, due to structural characteristics, the existing hydraulic tank needs to reach a certain threshold value before it can achieve internal and external communication. Therefore, during use, the hydraulic oil tank will have a slight expansion and contraction movement. In the long run, it is easy to cause fatigue failure of the hydraulic oil tank, affecting the service life of the hydraulic oil tank. Summary of the invention

[0003] The purpose of the present invention is to provide an automatic compensating and balancing component for the internal pressure of an oil tank to prevent cracking of the tank body, which is used to solve the above-mentioned technical problems. By utilizing the automatic compensating and balancing component, real-time air pressure regulation can be achieved during the circulation of hydraulic oil in the hydraulic tank, thereby avoiding expansion and contraction movements of the hydraulic tank, increasing the service life of the hydraulic tank, and reducing fatigue wear.

[0004] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0005] An automatic compensating and balancing assembly for preventing a tank body from cracking comprises a hydraulic oil tank, wherein the hydraulic oil tank is provided with a cavity for accommodating hydraulic oil, the hydraulic oil tank is provided with an automatic compensating and balancing assembly, the automatic compensating and balancing assembly comprises two automatic compensating and balancing units, the two automatic compensating and balancing units are divided into an oil inlet end balancing unit and an oil outlet end balancing unit, the oil inlet end balancing unit is used to connect with an oil inlet pipe and complete the input of hydraulic oil in the hydraulic oil tank, the oil outlet end balancing unit is used to connect with an oil outlet pipe and complete the output of hydraulic oil in the hydraulic oil tank; when the hydraulic oil tank is in an oil inlet state, the oil inlet end balancing unit can realize the compensating discharge of the air pressure in the hydraulic oil tank; when the hydraulic oil tank is in an oil outlet state, the oil outlet end balancing unit can realize the compensating input of the air pressure in the hydraulic oil tank.

[0006] The automatic compensation balancing unit includes an air pressure replenishing shell, an impeller portion is arranged inside the air pressure replenishing shell, the impeller portion is located in the oil inlet channel, the impeller portion can drive the piston arm to rotate through a rotating shaft, the end of the piston arm is connected to a piston member, the piston member is driven by the piston arm to move along the piston cavity, and the piston cavity can be connected to the ventilation end through an elastic valve.

[0007] The oil inlet channel includes a front end channel, an impeller cavity and a terminal channel. The impeller part is installed in the impeller cavity. The center horizontal plane of the front end channel is higher than the center horizontal plane of the terminal channel. The hydraulic oil enters the impeller cavity through the front end channel and drives the impeller part to rotate.

[0008] The elastic valve includes a blocking valve body, a stroke shaft and a return spring sleeved on the stroke shaft. The blocking valve body can block or open the ventilation inlet in the ventilation end. When the piston cavity is in a positive pressure state, the blocking valve body can be opened to achieve communication between the ventilation cavity and the piston cavity through the ventilation inlet. When the piston cavity is in a negative pressure state, the blocking valve body closes the ventilation inlet to achieve isolation between the ventilation cavity and the piston cavity.

[0009] The movable plug valve is installed on the piston member, and the movable plug valve includes a plug valve flow channel and an elastic plug valve member for blocking or opening the end of the plug valve flow channel; when the piston chamber is in a negative pressure state, the elastic plug valve member can be opened to achieve communication between the ventilation chamber and the piston chamber through the plug valve flow channel; when the piston chamber is in a positive pressure state, the elastic plug valve member closes the plug valve flow channel to achieve isolation between the ventilation chamber and the piston chamber.

[0010] When the automatic compensation balancing unit is an oil inlet end balancing unit, the ventilation cavity is connected with the cavity body through the supplementary ventilation pipe, and the ventilation cavity can be connected with the piston cavity through the movable plug valve.

[0011] The position where the supplementary ventilation pipe and the cavity are connected is located above the highest position of the hydraulic oil in the cavity.

[0012] An oil return assembly is provided on the hydraulic oil tank, and the oil return assembly passes through the cavity. The hydraulic oil enters the oil return assembly through the oil inlet end balancing unit and completes the input of the hydraulic oil in the hydraulic oil tank.

[0013] When the automatic compensation balancing unit is an oil outlet balancing unit, the ventilation cavity in the ventilation end is connected with the cavity through the supplementary air supply pipe, and the ventilation cavity can be connected with the piston cavity through the blocking valve body.

[0014] The ventilation cavity is connected with the outside through the ventilation end cover, and the ventilation cavity can be connected with the piston cavity through the movable plug valve.

[0015] Compared with the prior art, the present invention has the following outstanding advantages and effects: through optimized design, the present invention utilizes the automatic compensation and balancing component to achieve real-time air pressure regulation during the circulation of hydraulic oil in the hydraulic oil tank, thereby avoiding the expansion and contraction movement of the hydraulic oil tank, increasing the service life of the hydraulic oil tank, reducing fatigue wear, and reducing the cracking of the hydraulic oil tank; optimizing the automatic compensation and balancing component and utilizing the potential kinetic energy conversion brought about by the inflow and outflow of hydraulic oil can achieve power self-sufficiency, reduce overall energy consumption, and at the same time slow down the flow rate of the hydraulic oil inflow and outflow, reducing the increase of bubbles caused by the flow rate.

[0016] The features of the present invention can be clearly understood by referring to the drawings and the following detailed description of the preferred embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the oil inlet end balancing unit of the present invention;

[0019] Figure 3 It is a cross-sectional structural diagram of the installation of the oil inlet end balancing unit and the hydraulic oil tank of the present invention;

[0020] Figure 4 It is a schematic diagram of the transmission structure of the impeller part, the piston arm and the piston member of the present invention;

[0021] Figure 5 It is a schematic cross-sectional structural diagram of the oil inlet end balancing unit of the present invention;

[0022] Figure 6 for Figure 5 A partial enlarged structural diagram of part A in the part;

[0023] Figure 7 This is a schematic structural diagram of the elastic valve of the present invention in an open state;

[0024] Figure 8 for Figure 5 A schematic diagram of the partially enlarged structure of part B in the section;

[0025] Fig. 9 This is a schematic structural diagram of the movable plug valve of the present invention in an open state;

[0026] Fig.10 It is a schematic diagram of the cross-sectional structure of the oil inlet channel of the present invention;

[0027] Fig.11 It is a schematic diagram of the elastic valve structure of the present invention;

[0028] Fig.12 It is a structural schematic diagram of the oil outlet end balancing unit of the present invention;

[0029] Fig.13 It is a cross-sectional structural schematic diagram of the oil outlet end balancing unit of the present invention;

[0030] Fig.14 It is a cross-sectional structural diagram of the installation of the oil outlet end balancing unit and the hydraulic oil tank of the present invention;

[0031] Among them, 1. hydraulic oil tank; 11. cavity; 12. oil outlet; 2. oil return assembly; 3. oil inlet pipe; 4. oil outlet pipe; 5. oil inlet end balance unit; 51. supplementary ventilation pipe; 6. oil outlet end balance unit; 61. supplementary air pipe; 62. ventilation end cover; 70. air pressure supplement shell; 700. oil inlet flow channel; 701. front end flow channel; 702. impeller cavity; 703. end flow channel; 71. impeller part; 72. rotating shaft; 73. piston arm; 74. piston part; 75. movable plug valve; 751. elastic plug valve part; 752. plug valve flow channel; 76. elastic valve; 761. blocking valve body; 762. stroke shaft; 763. reset spring; 77. piston cavity; 78. through cavity; 79. ventilation end; 791. ventilation cavity; 792. ventilation inlet. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific diagrams.

[0033] Combined with Figures 1 to 14As shown, the present embodiment provides an automatic compensation balancing assembly for preventing the tank from cracking, including a hydraulic oil tank 1, a cavity 11 for accommodating hydraulic oil is provided in the hydraulic oil tank 1, and the hydraulic oil tank 1 is equipped with an automatic compensation balancing assembly, which includes two automatic compensation balancing units, and the two automatic compensation balancing units are divided into an oil inlet end balancing unit 5 and an oil outlet end balancing unit 6. The oil inlet end balancing unit 5 is used to connect with the oil inlet pipe 3 and complete the input of the hydraulic oil in the hydraulic oil tank 1. Specifically, the hydraulic oil tank 1 An oil return assembly 2 is provided on it, and the oil return assembly 2 passes through the cavity 11. The hydraulic oil enters the oil return assembly 2 through the oil inlet end balancing unit 5, and completes the input of the hydraulic oil in the hydraulic oil tank 1. The oil outlet end balancing unit 6 is used to connect with the oil outlet pipe 4 and complete the output of the hydraulic oil in the hydraulic oil tank 1; when the hydraulic oil tank 1 is in the oil inlet state, the oil inlet end balancing unit 5 can realize the compensation discharge of the air pressure in the hydraulic oil tank 1; when the hydraulic oil tank 1 is in the oil outlet state, the oil outlet end balancing unit 6 can realize the compensation input of the air pressure in the hydraulic oil tank 1.

[0034] The oil return component 2 adopts an oil return filter commonly used in the prior art to communicate with the cavity 11, so as to achieve filtering of the hydraulic oil.

[0035] In one embodiment, the oil inlet end balancing unit 5 includes an air pressure supplementing shell 70, and an impeller portion 71 is provided inside the air pressure supplementing shell 70. The impeller portion 71 is located in the oil inlet flow channel 700. The impeller portion 71 can drive the piston arm 73 to rotate through the rotating shaft 72. The end of the piston arm 73 is connected to a piston member 74. The piston member 74 is driven by the piston arm 73 to move along the piston cavity 77. The piston cavity 77 can be connected to the ventilation end 79 through the elastic valve 76.

[0036] Combination Fig.10 As shown, the oil inlet channel 700 includes a front end channel 701, an impeller cavity 702 and a terminal channel 703. The front end channel 702 is used to connect to the oil inlet pipe 3, and the terminal channel 703 is used to connect to the oil return assembly 2. The impeller part 71 is installed in the impeller cavity 702. The center horizontal plane of the front end channel 701 is higher than the center horizontal plane of the terminal channel 703. The hydraulic oil enters the impeller cavity 702 through the front end channel 701 and drives the impeller part 71 to rotate. The structural design of the oil inlet channel 700 is optimized, and a high-low drop structure is adopted. At the same time, the hydraulic oil itself is combined with the hydraulic oil. The hydraulic oil has a flow rate when it is input, and after entering through the front end flow channel 701, it hits the impeller blades on the impeller part 71. Combined with the waterwheel principle, the height difference is used to convert the potential kinetic energy of the hydraulic oil itself into a power source for driving the rotating shaft 72 to rotate. With the continuous impact of the hydraulic oil, the rotating shaft 72 rotates, and the piston arm 73 arranged at the other end of the rotating shaft 72 completes the rotation and swinging. The piston arm 73 is usually designed with a crankshaft structure or a cam structure, so that the end piston member 74 can realize reciprocating operation and realize the pushing and pulling of the piston member 74.

[0037] Combination Figure 6 As shown, the elastic valve 76 is installed on the ventilation end 79, and the ventilation end 79 can be connected with the outside atmosphere. The one-way valve structure design adopted by the elastic valve 76 is specifically that the elastic valve 76 includes a blocking valve body 761, a stroke shaft 762 and a return spring 763 sleeved on the stroke shaft 762. The blocking valve body 761 can realize the blocking or opening of the ventilation inlet 792 in the ventilation end 79; when the piston cavity 77 is in a positive pressure state, the blocking valve body 761 can be opened to realize the connection between the ventilation cavity 791 and the piston cavity 77 through the ventilation inlet 792; when the piston cavity 77 is in a negative pressure state, the blocking valve body 761 closes the ventilation inlet 792 to realize the isolation of the ventilation cavity 791 and the piston cavity 77.

[0038] In addition, the air pressure supplement shell 70 also includes a ventilation chamber 78, which is connected with the cavity 11 through the supplementary ventilation pipe 51, and the ventilation chamber 78 can be connected with the piston cavity 77 through the active plug valve 75. The connection position between the supplementary ventilation pipe 51 and the cavity 11 is located at the upper part of the highest position of the hydraulic oil in the cavity 11; wherein, the active plug valve 75 is installed on the piston member 74, and the active plug valve 75 includes a plug valve flow channel 752 and an elastic plug valve member 751 for blocking or opening the end of the plug valve flow channel 752, and the elastic plug valve member 751 is preferably made of elastic rubber material or silicone material; when the piston cavity 77 is in a negative pressure state, the elastic plug valve member 751 can be opened to realize the connection between the ventilation chamber 78 and the piston cavity 77 through the plug valve flow channel 752, and when the piston cavity 77 is in a positive pressure state, the elastic plug valve member 751 closes the plug valve flow channel 752 to achieve isolation between the ventilation chamber 78 and the piston cavity 77.

[0039] A bearing seat is provided on the rotating shaft 72, and a sealing mechanism is provided inside the bearing seat. The sealing mechanism is used to isolate the impeller cavity 702 and the ventilation cavity 78 to avoid leakage.

[0040] The working principle of the oil inlet end balancing unit is as follows: when the hydraulic oil tank 1 is in circulation due to the hydraulic system, the hydraulic oil enters the oil inlet end balancing unit 5 through the oil inlet pipe, and enters the cavity 11 in combination with the oil return component 2. During this process, the hydraulic oil is continuously input into the cavity 11 in the hydraulic oil tank 1, causing the air pressure in the cavity 11 to gradually increase. At this time, the oil inlet end balancing unit 5 can be used to achieve compensatory pressure relief.

[0041] Specifically, the hydraulic oil drives the impeller 71 to rotate by flowing, thereby driving the rotating shaft 72 to complete the rotation. The piston arm 73 installed at the other end of the rotating shaft 72 drives the piston member 74 to push and pull the end piston member 74. As the piston member 74 moves along the piston cavity 77, the piston cavity 77 expands and contracts. Usually, when the piston member 74 moves upward, the piston cavity 77 becomes smaller, so the gas in the piston cavity 77 is compressed, so that the piston cavity 77 is in a positive pressure state, and the elastic valve 76 is compressed. Under the influence of positive pressure, the blocking valve body 761 moves upward with the stroke shaft 762, so that the blocking valve body 761 leaves the ventilation inlet 792, so that the ventilation inlet 792 is in an open state, and the piston cavity 77 is connected with the ventilation cavity 791. The gas in the piston cavity 77 enters the ventilation cavity 791 through the ventilation inlet 792 and then is discharged outward; as the piston member 74 moves downward, the piston cavity 77 becomes larger, and the gas in the piston cavity 77 is diluted, completing the negative pressure conversion. Due to the influence of air pressure, combined with the reset The spring 763 makes the blocking valve body 761 move downward with the stroke shaft 762, so that the blocking valve body 761 completes the blocking of the ventilation inlet 792, so that the ventilation inlet 792 is in a closed state, and the piston cavity 77 is isolated from the ventilation cavity 791. At this time, the movable plug valve 75 located on the piston member 74 is combined. Because the movable plug valve 75 is affected by the negative pressure, the elastic plug valve member 751 is tilted, so that the plug valve flow channel 752 is opened, and the ventilation cavity 78 and the piston cavity 77 are connected. Because the ventilation cavity 78 is connected to the supplementary ventilation pipe 5 1 is connected with the cavity 11 in the hydraulic oil tank 1, so that the gas in the cavity 11 in the hydraulic oil tank 1 can enter the ventilation cavity 78 through the supplementary ventilation pipe 51, and enter the piston cavity 77 through the plug valve flow channel 752, completing the suction operation in the piston cavity 77. With the movement of the piston member 74, the piston cavity 77 gradually changes to a positive pressure state due to the change in volume, so that the gas is discharged. For this reason, combined with the cyclic reciprocating exhaust and suction operations realized by the oil inlet end balancing unit 5, the automatic compensation adjustment of the air pressure inside the cavity 11 is realized.

[0042] In one embodiment, the oil outlet balancing unit 6 includes an air pressure supplement shell 70, and an impeller portion 71 is provided inside the air pressure supplement shell 70. The impeller portion 71 is located in the oil inlet channel 700. The impeller portion 71 can drive the piston arm 73 to rotate through the rotating shaft 72. The end of the piston arm 73 is connected to a piston member 74. The piston member 74 is driven by the piston arm 73 to move along the piston cavity 77. The piston cavity 77 can be connected to the ventilation end 79 through the elastic valve 76.

[0043] Combination Fig.14As shown, the oil inlet channel 700 includes a front end channel 701, an impeller cavity 702 and a terminal channel 703, wherein the oil inlet channel 700 is used to discharge the hydraulic oil, the front end channel 701 is used to connect the oil outlet end 12 in the hydraulic oil tank 1, and the terminal channel 703 is used to connect the oil outlet pipe 4, the impeller part 71 is installed in the impeller cavity 702, the center horizontal plane of the front end channel 701 is higher than the center horizontal plane of the terminal channel 703, the hydraulic oil enters the impeller cavity 702 through the front end channel 701, and drives the impeller part 71 to rotate; the structural design of the oil inlet channel 700 is optimized, and the high and low The drop structure, combined with the flow rate of the hydraulic oil itself when it is output, the hydraulic oil enters through the front end flow channel 701 and hits the impeller blades on the impeller part 71. Combined with the water wheel principle, the height difference is used to convert the potential kinetic energy of the hydraulic oil itself into a power source to drive the rotating shaft 72 to rotate. With the continuous impact of the hydraulic oil, the rotating shaft 72 rotates, and the piston arm 73 arranged at the other end of the rotating shaft 72 completes the rotation and swinging. The piston arm 73 is usually designed with a crankshaft structure or a cam structure, so that the end piston member 74 can be reciprocated, and the piston member 74 can be pushed and pulled.

[0044] Combination Figure 6 As shown, the elastic valve 76 is installed on the ventilation end 79, and the ventilation end 79 is connected with the cavity 11 through the supplementary air supply pipe 61, wherein the elastic valve 76 adopts a one-way valve structure design, specifically, the elastic valve 76 includes a blocking valve body 761, a stroke shaft 762 and a return spring 763 sleeved on the stroke shaft 762, and the blocking valve body 761 can realize the blocking or opening of the ventilation inlet 792 in the ventilation end 79; when the piston cavity 77 is in a positive pressure state, the blocking valve body 761 can be opened to realize the connection between the ventilation cavity 791 and the piston cavity 77 through the ventilation inlet 792, and when the piston cavity 77 is in a negative pressure state, the blocking valve body 761 closes the ventilation inlet 792 to realize the isolation of the ventilation cavity 791 and the piston cavity 77.

[0045] The ventilation cavity 791 in the ventilation end 79 is connected with the cavity 11 through the supplementary air supply pipe 61, and the ventilation cavity 791 can be connected with the piston cavity 77 through the blocking valve body 761. The supplementary air supply pipe 61 is connected with the cavity 11, and the connection port is located at the upper part of the highest position of the hydraulic oil in the cavity 11; the ventilation cavity 78 is connected with the outside through the ventilation end cover 62, and the ventilation end cover 62 is preferably provided with an air filter to prevent external impurities from entering the hydraulic oil tank 1. The ventilation cavity 78 can be connected with the piston cavity 77 through the movable plug valve 75; wherein the movable plug valve 75 Installed on the piston member 74, the movable plug valve 75 includes a plug valve channel 752 and an elastic plug valve member 751 for blocking or opening the end of the plug valve channel 752. The elastic plug valve member 751 is preferably made of elastic rubber or silicone material; when the piston chamber 77 is in a negative pressure state, the elastic plug valve member 751 can be opened to achieve communication between the ventilation chamber 78 and the piston chamber 77 through the plug valve channel 752; when the piston chamber 77 is in a positive pressure state, the elastic plug valve member 751 closes the plug valve channel 752 to achieve isolation between the ventilation chamber 78 and the piston chamber 77.

[0046] A bearing seat is provided on the rotating shaft 72, and a sealing mechanism is provided inside the bearing seat. The sealing mechanism is used to isolate the impeller cavity 702 and the ventilation cavity 78 to avoid leakage.

[0047] The working principle of the oil outlet balancing unit 6 is as follows: when the hydraulic oil tank 1 is in circulation operation due to the hydraulic system, and the hydraulic oil enters the hydraulic circulation system through the oil outlet pipe for use, the hydraulic oil enters the oil inlet and outlet balancing unit 6 through the oil outlet end 12 and completes the oil outlet through the oil outlet pipe 4. During this process, the hydraulic oil in the hydraulic oil tank 1 is in a reduced state, so that the proportion of the gas cavity in the cavity 11 of the hydraulic oil tank 1 gradually increases, which easily leads to dilution of the internal air pressure and the occurrence of negative pressure. For this reason, the combination of the oil outlet balancing unit 6 can achieve compensation and pressure replenishment of the internal gas to avoid the occurrence of negative pressure.

[0048] Specifically, as the hydraulic oil flows, the impeller 71 is driven to rotate, thereby driving the rotating shaft 72 to complete the rotation. The piston arm 73 installed at the other end of the rotating shaft 72 drives the piston member 74 to push and pull the end piston member 74. As the piston member 74 moves along the piston cavity 77, the piston cavity 77 expands and contracts. Usually, when the piston member 74 moves upward, the piston cavity 77 becomes smaller, so the gas in the piston cavity 77 is compressed, so that the piston cavity 77 is in a positive pressure state. The elastic valve 76 is affected by the positive pressure and its sealing The plugging valve body 761 moves upward with the stroke shaft 762, so that the plugging valve body 761 leaves the ventilation inlet 792, so that the ventilation inlet 792 is in an open state, and the piston chamber 77 is connected with the ventilation chamber 791. The gas in the piston chamber 77 enters the ventilation chamber 791 through the ventilation inlet 792, and then is input into the chamber 11 of the hydraulic oil tank 1 through the supplementary air pipe 61 to complete the compensation pressure. As the piston member 74 moves downward, the piston chamber 77 becomes larger, and the gas in the piston chamber 77 is diluted, completing the negative pressure conversion. Under the influence of air pressure, the return spring 763 makes the blocking valve body 761 move downward with the stroke shaft 762, so that the blocking valve body 761 completes the blocking of the ventilation inlet 792, so that the ventilation inlet 792 is in a closed state, and the piston cavity 77 is isolated from the ventilation cavity 791. At this time, the movable plug valve 75 located on the piston member 74 is combined. Because the movable plug valve 75 is affected by negative pressure, the elastic plug valve member 751 is tilted, so that the plug valve flow channel 752 is opened, and the ventilation cavity 78 and the piston cavity 77 are connected. Because the ventilation cavity 78 passes through the ventilation end cover 6 2 and enters the ventilation chamber 78, and the gas in the ventilation chamber 78 enters the piston chamber 77 through the plug valve flow channel 752, completing the suction operation in the piston chamber 77. With the movement of the piston member 74, the piston chamber 77 gradually changes to a positive pressure state due to the change in volume, so that the gas is compensated and supplemented to the cavity 11. In this process, the air pressure in the cavity 11 is gradually reduced due to the continuous output of the hydraulic oil. Therefore, the reciprocating exhaust and suction operations realized by the oil outlet end balance unit 6 are combined to realize the automatic compensation adjustment of the air pressure inside the cavity 11.

[0049] The present invention optimizes the design and utilizes the automatic compensating and balancing component to achieve real-time air pressure regulation during the circulation of hydraulic oil in the hydraulic oil tank, thereby avoiding expansion and contraction of the hydraulic oil tank, increasing the service life of the hydraulic oil tank, reducing fatigue wear, and reducing cracking of the hydraulic oil tank; the automatic compensating and balancing component is optimized and the potential kinetic energy conversion brought about by the inflow and outflow of hydraulic oil is utilized to achieve power self-sufficiency, reduce overall energy consumption, and at the same time, slow down the flow rate of the inflow and outflow of hydraulic oil, thereby reducing the increase of bubbles caused by the flow rate.

[0050] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. An automatic compensating and balancing assembly for preventing the tank from cracking, comprising a hydraulic oil tank, wherein a cavity for containing hydraulic oil is provided in the hydraulic oil tank, and characterized in that: The hydraulic oil tank is equipped with an automatic compensating balancing component, which includes two automatic compensating balancing units. The two automatic compensating balancing units are divided into an oil inlet balancing unit and an oil outlet balancing unit. The oil inlet balancing unit is used to connect with the oil inlet pipe and complete the input of the hydraulic oil in the hydraulic oil tank. The oil outlet balancing unit is used to connect with the oil outlet pipe and complete the output of the hydraulic oil in the hydraulic oil tank. When the hydraulic oil tank is in the oil inlet state, the oil inlet balancing unit can realize the compensating discharge of the air pressure in the hydraulic oil tank; when the hydraulic oil tank is in the oil outlet state, the oil outlet balancing unit can realize the compensating input of the air pressure in the hydraulic oil tank. The automatic compensation balancing unit comprises an air pressure supplement housing, an impeller portion is arranged inside the air pressure supplement housing, the impeller portion is located in the oil inlet flow channel, the impeller portion can drive the piston arm to rotate through the rotating shaft, the end of the piston arm is connected to a piston member, the piston member is driven by the piston arm to move along the piston cavity, and the piston cavity can be connected with the gas exchange end through the elastic valve; The oil inlet flow channel includes a front end flow channel, an impeller cavity and a terminal flow channel. The impeller part is installed in the impeller cavity. The central horizontal plane of the front end flow channel is higher than the central horizontal plane of the terminal flow channel. The hydraulic oil enters the impeller cavity through the front end flow channel and drives the impeller part to rotate. The elastic valve includes a blocking valve body, a stroke shaft and a return spring sleeved on the stroke shaft. The blocking valve body can block or open the ventilation inlet in the ventilation end. When the piston cavity is in a positive pressure state, the blocking valve body can be opened to achieve communication between the ventilation cavity and the piston cavity through the ventilation inlet. When the piston cavity is in a negative pressure state, the blocking valve body closes the ventilation inlet to achieve isolation between the ventilation cavity and the piston cavity.

2. The oil tank internal pressure automatic compensation balancing assembly for preventing tank cracking according to claim 1, characterized in that: The movable plug valve is installed on the piston member, and the movable plug valve includes a plug valve flow channel and an elastic plug valve member for blocking or opening the end of the plug valve flow channel; when the piston chamber is in a negative pressure state, the elastic plug valve member can be opened to achieve communication between the ventilation chamber and the piston chamber through the plug valve flow channel; when the piston chamber is in a positive pressure state, the elastic plug valve member closes the plug valve flow channel to achieve isolation between the ventilation chamber and the piston chamber.

3. The oil tank internal pressure automatic compensation balancing assembly for preventing tank cracking according to claim 2, characterized in that: When the automatic compensation balancing unit is an oil inlet end balancing unit, the ventilation cavity is connected with the cavity body through the supplementary ventilation pipe, and the ventilation cavity can be connected with the piston cavity through the movable plug valve.

4. The oil tank internal pressure automatic compensation and balancing assembly for preventing tank cracking according to claim 3 is characterized in that: The position where the supplementary ventilation pipe and the cavity are connected is located above the highest position of the hydraulic oil in the cavity.

5. The oil tank internal pressure automatic compensation and balancing assembly for preventing tank cracking according to claim 4, characterized in that: An oil return assembly is provided on the hydraulic oil tank, and the oil return assembly passes through the cavity. The hydraulic oil enters the oil return assembly through the oil inlet end balancing unit and completes the input of the hydraulic oil in the hydraulic oil tank.

6. The oil tank internal pressure automatic compensation balancing assembly for preventing tank cracking according to claim 1, characterized in that: When the automatic compensation balancing unit is an oil outlet balancing unit, the ventilation cavity in the ventilation end is connected with the cavity through the supplementary air supply pipe, and the ventilation cavity can be connected with the piston cavity through the blocking valve body.

7. The oil tank internal pressure automatic compensation and balancing assembly for preventing tank cracking according to claim 6, characterized in that: The ventilation cavity is connected with the outside through the ventilation end cover, and the ventilation cavity can be connected with the piston cavity through the movable plug valve.

Images