Active pressurized lid pressure equalization system for a sealed storage chamber

Abstract

The application belongs to the technical field of automation control, and discloses a kind of active pressurizing cover pressure balance system of closed storage chamber, including pressure sensing module, obtains the pressure information inside and outside chamber and cover sealing contact state in the process of closed storage chamber operation;Based on the physical correlation between the pressure difference inside and outside chamber and cover sealing contact state, construct pressure-sealing coupling state vector, and align with preset pressure reference state, obtain pressure deviation description quantity;Stress analysis module, based on pressure deviation description quantity, combined with cover structure form and sealing area distribution, construct cover partition stress distribution, and distinguish the stress difference between edge sealing area and center pressure area, form response state parameter set;Realize the fine regulation and control of chamber pressure and cover sealing state.

Description

Technical Field

[0001] This invention relates to the field of automation control technology, and more specifically, to an active pressurization cover pressure balancing system for a sealed storage chamber. Background Technology

[0002] Existing pressure balancing systems for sealed storage chambers mainly suffer from the following problems: Existing pressurization or sealing control technologies for sealed storage chambers mainly rely on the pressure difference between the inside and outside of the chamber for adjustment. They fail to simultaneously obtain the sealing contact status of the cover, making it difficult to accurately reflect the actual sealing conditions. This results in situations where "the pressure is normal but the seal is poor" or "the pressure is abnormal but the seal is good," making it difficult to guarantee the reliability of the chamber seal.

[0003] In addition, traditional technologies typically employ overall pressure equalization or fixed pressure strategies, which can easily lead to uneven local stress, increasing fatigue and wear on seals and cover structures.

[0004] In terms of adjustment methods, most of them adopt instantaneous or fixed-amplitude pressurization, lacking gradual control, which may impact the cover structure and sealing interface, reduce the stability of adjustment, and increase energy consumption and system oscillation risk.

[0005] In view of this, the present invention proposes an active pressurized cover pressure balancing system for a sealed storage chamber to solve the above problems. Summary of the Invention

[0006] To overcome the aforementioned deficiencies of the prior art and to achieve the above objectives, the present invention provides the following technical solution: an active pressurization cover pressure balancing system for a sealed storage chamber, comprising: The pressure sensing module acquires the internal and external pressure information of the sealed storage chamber and the sealing contact state of the cover during operation. Based on the physical relationship between the internal and external pressure difference and the sealing contact state of the cover, it constructs a pressure-sealing coupled state vector and aligns it with a preset pressure reference state to obtain the pressure deviation description. The stress analysis module, based on the pressure deviation descriptor, combined with the cover structure morphology and sealing area distribution, constructs the stress distribution of the cover partitions, distinguishes the stress difference between the edge sealing area and the central pressure area, and forms a set of response state parameters; The pressurization guidance module calculates the compensation pressure distribution required to achieve pressure balance and maintain sealing reliability based on the response state parameter set, and drives the pressurization cover to implement active pressurization adjustment in a progressive manner. The adaptive balancing module jointly determines the current chamber pressure state based on the changing trend of the pressure deviation descriptor and the preset stable range within the continuous adjustment cycle; based on the joint determination result, it adaptively switches between pressure maintenance and active pressurization adjustment, thereby maintaining the pressure balance of the sealed storage chamber.

[0007] Preferably, the internal and external pressure information of the cavity includes the internal pressure value and the external pressure value of the cavity; the sealing contact state of the cover includes the sealing contact area ratio, the contact pressure of the sealing area, the relative displacement of the cover, and the sealing compression amount.

[0008] Preferably, the method for constructing the pressure-sealing coupling state vector includes: The pressure difference between the inside and outside of the chamber is obtained by calculating the difference between the internal and external pressure values. Based on the mechanical mechanism of the pressure difference between the inside and outside of the chamber on the pressure cover and sealing structure, the physical correlation between the pressure difference between the inside and outside of the chamber and the sealing contact state of the cover is analyzed. The pressure difference between the inside and outside of the cavity is used as the applied load on the pressure cover and sealing structure, and the sealing contact state is used as the structural response formed under the applied load. The correspondence between the two is uniformly represented under the same working conditions, and they are combined in a preset order to form a pressure-sealing coupling state vector.

[0009] Preferably, the method for obtaining the pressure deviation descriptive quantity includes: After aligning the obtained pressure-sealing coupling state vector with the preset pressure reference state vector, the difference is calculated to form the pressure deviation description. The preset pressure reference state vector is pre-established based on the historical stable operating conditions of the sealed storage chamber, including typical values ​​of the corresponding pressure difference between the inside and outside of the chamber and the sealing contact state of the cover.

[0010] Preferably, the method for constructing the force distribution of the cover zone includes: Based on the structural morphology of the cover and the distribution of the sealing area, the pressure surface of the cover is divided into regions, and the cover is divided into stress regions with different pressure characteristics. Each stress region corresponds to the central pressure region and the edge sealing region of the cover. For each stress-bearing region, the equivalent pressure-bearing area corresponding to the stress-bearing region is determined. The equivalent pressure-bearing area is used to characterize the effective area of ​​the current stress-bearing region that actually participates in the stress under the action of the pressure difference between the inside and outside of the cavity. Based on the pressure difference between the inside and outside of the cavity in the pressure deviation description, combined with the equivalent pressure-bearing area corresponding to each stress-bearing region, and a correction coefficient is introduced for correction, the equivalent stress of each stress-bearing region is calculated, forming a stress distribution of the cover with regional differentiation.

[0011] Preferably, the method for obtaining the response state parameter set includes: The equivalent stress results of each stress region are summarized, and the difference in equivalent stress between the edge sealing region and the central pressure region is calculated. The summarized results and the difference values ​​are integrated to form a set of response state parameters.

[0012] Preferably, the method for obtaining the compensation pressure distribution includes: Different sealing contact sampling points were selected within the sealing area of ​​the cover, and the local contact stress at each sealing contact sampling point was collected. Combined with the pressure difference between the inside and outside of the cavity, a sealing reliability index was constructed. With the primary control objective of achieving chamber pressure balance, the target differential pressure compensation amount is determined based on the pressure deviation descriptor. Simultaneously, the sealing reliability index is compared with the preset sealing reliability threshold, and the sealing reliability index is used as a safety constraint condition for adjusting the compensation pressure. The target differential pressure compensation amount is then subject to restrictive correction to obtain the compensation pressure that meets the requirements for maintaining sealing reliability. Based on the summary results of the equivalent stress of each stress area of ​​the cover body contained in the response state parameter set, and the difference value of the equivalent stress of the edge sealing area and the central pressure area, the regional weight of each stress area is set; based on the regional weight, the compensation pressure is mapped to the corresponding stress area to form a compensation pressure distribution that matches the stress characteristics of the cover body, and the compensation pressure allocated to the edge sealing area is limited to be less than or equal to the compensation pressure allocated to the central pressure area.

[0013] Preferably, the method for gradually driving the pressure cap to implement active pressure adjustment includes: The compensation pressure distribution is mapped to the target pressurization load on different stress areas, and a staged pressurization adjustment path is constructed based on the target pressurization load to transition from the current pressurization state to the target pressurization state. During the pressurization adjustment process, the target pressurization load is decomposed into continuously increasing pressure increments and applied to the stress areas step by step in a preset order. After each pressure increment is applied, the pressurization effect is checked based on the response state parameter set of the pressurized cover. Only when the pressurization state meets the requirements of pressure balance and sealing stability will the next pressure increment be applied, thereby driving the pressurized cover to complete the active pressurization adjustment in a gradual manner.

[0014] Preferably, the method for jointly determining the current chamber pressure state includes: Within a continuous adjustment cycle, the pressure deviation descriptive quantity corresponding to each adjustment cycle is obtained, and a pressure deviation change sequence is constructed in chronological order. Based on the pressure deviation change sequence, the difference between the pressure deviation descriptive quantities between adjacent adjustment cycles is calculated to obtain the change amplitude of pressure deviation, and it is determined whether the change amplitude shows a trend of continuously decreasing as the adjustment cycle progresses. When the magnitude of pressure deviation changes continuously decreases as the adjustment cycle progresses, it is further determined whether the magnitude of change is less than the preset magnitude threshold, and at the same time, it is determined whether the pressure deviation description in consecutive different adjustment cycles falls within the preset stable range centered on the target differential pressure compensation amount. When the pressure deviation descriptive value falls within the preset stable range centered on the target differential pressure compensation value in different consecutive adjustment cycles, and the change in the pressure deviation descriptive value does not exceed the preset change range threshold, it is determined that the current sealed storage chamber is in a pressure balance state; otherwise, it is determined that the current sealed storage chamber is in a non-pressure balance state.

[0015] Preferably, the method for adaptively switching between pressure maintenance and active pressurization regulation based on joint determination results includes: When it is determined that the current sealed storage chamber is in a pressure balance state, it enters the pressure holding mode, stops applying new compensation pressure to the pressurized cover, and only maintains the current pressurization state. When it is determined that the current sealed storage chamber is in a non-pressure balance state, it automatically switches to the active pressurization mode and recalculates the compensation pressure distribution; according to the new compensation pressure distribution, it drives the pressurization cover to perform active pressurization adjustment to gradually correct the pressure deviation inside and outside the chamber.

[0016] During the active pressurization process, the pressure deviation description is continuously collected according to the preset adjustment cycle. After each subsequent adjustment cycle, a joint judgment is performed again. When the joint judgment result changes from a non-pressure balance state to a pressure balance state, the active pressurization process is automatically terminated and the system switches back to pressure holding mode.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This invention analyzes the structural morphology and sealing area of ​​the cover in sections and introduces equivalent pressure area and correction coefficient. It can accurately reflect the actual stress situation of each stress area of ​​the cover, distinguish the stress difference between the central pressure area and the edge sealing area, and avoid local overload or sealing failure. The resulting zoned force distribution can serve as the basic input for active pressurization control, enabling the system to apply differentiated compensation pressure to different areas, achieving simultaneous maintenance of pressure balance and sealing reliability. The related technical solutions are not only applicable to conventional circular or rectangular covers, but can also be extended to complex polygonal or irregularly shaped covers, and are compatible with different sealing layouts (such as annular, segmented, or partial seals), exhibiting strong versatility and applicable to various sealed storage chambers and pressure control needs under different operating conditions. By introducing sealing contact stress and chamber pressure difference to construct a sealing reliability index, the sealing safety margin is evaluated simultaneously in the pressure compensation calculation, so that pressure regulation can achieve pressure balance under the premise of ensuring sealing reliability. By sampling the sealing area to construct quantitative indicators and linking the target pressure difference compensation with the sealing reliability threshold, the compensation pressure amplitude can be automatically limited, thereby effectively preventing sealing fatigue, plastic deformation or failure caused by excessive pressure and improving the system operation safety. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the active pressurization cover pressure balancing system for a sealed storage chamber according to the present invention. Figure 2 This is a schematic diagram of the process for an active pressurization cover pressure balancing method for a sealed storage chamber according to the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1 Please see Figure 1 As shown, this embodiment provides an active pressurization cover pressure balancing system for a sealed storage chamber, specifically including the following steps: The pressure sensing module acquires the internal and external pressure information of the sealed storage chamber and the sealing contact state of the cover during operation. Based on the physical relationship between the internal and external pressure difference and the sealing contact state of the cover, it constructs a pressure-sealing coupled state vector and aligns it with a preset pressure reference state to obtain the pressure deviation description. The stress analysis module, based on the pressure deviation descriptor, combined with the cover structure morphology and sealing area distribution, constructs the stress distribution of the cover partitions, distinguishes the stress difference between the edge sealing area and the central pressure area, and forms a set of response state parameters; The pressurization guidance module calculates the compensation pressure distribution required to achieve pressure balance and maintain sealing reliability based on the response state parameter set, and drives the pressurization cover to implement active pressurization adjustment in a progressive manner. The adaptive balancing module jointly determines the current chamber pressure state based on the changing trend of the pressure deviation descriptor and the preset stable range within the continuous adjustment cycle; based on the joint determination result, it adaptively switches between pressure maintenance and active pressurization adjustment, thereby maintaining the pressure balance of the sealed storage chamber.

[0021] The pressure information inside and outside the chamber includes the pressure value inside the chamber and the pressure value outside the chamber. It is acquired synchronously within the same sampling period by setting pressure sensing devices inside and outside the chamber. Among them, the internal pressure value of the chamber is used to characterize the gas pressure or medium pressure currently borne by the sealed storage chamber, and the external pressure value of the chamber is used to characterize the reverse pressure constraint exerted by the external environment on the sealed storage chamber. By collecting the internal and external pressure information of the chamber, the overall pressure load state currently borne by the cover is quantified, providing data support for subsequent correlation and coupling with the sealing contact state, avoiding the problem of inaccurate judgment of the cover force due to relying only on one-sided pressure information. The sealing contact state of the cover includes the ratio of the sealing contact area, the contact pressure of the sealing area, the relative displacement of the cover, and the sealing compression. It is used to characterize the contact relationship between the pressurized cover and the sealing structure of the sealed storage chamber, and reflects the stress state, contact integrity, and sealing performance between the pressurized cover and the sealing structure. The sealing contact state of the cover can be collected in real time by pressure sensors and displacement sensors deployed in the sealing area, and the sealing compression is calculated by the elastic parameters of the sealing structure and the load relationship.

[0022] Methods for constructing pressure-sealing coupled state vectors include: The pressure difference between the inside and outside of the chamber is obtained by calculating the pressure difference between the inside and outside of the chamber, which characterizes the overall pressure difference load acting on the pressure cover and sealing structure. Based on the mechanical mechanism of the pressure difference between the inside and outside of the chamber on the pressure cover and sealing structure, the physical correlation between the pressure difference between the inside and outside of the chamber and the sealing contact state of the cover is analyzed. The mechanical mechanism manifests as follows: during the operation of a sealed storage chamber, the pressure difference between the inside and outside of the chamber generates a mechanical load distributed along the normal direction on the pressurized cover and its sealing structure. This mechanical load is transmitted to the sealing contact interface through the cover structure, thereby directly affecting the contact pressure distribution in the sealing area, the degree of compression deformation of the sealing components, and the stability of the sealing contact state. Based on the above mechanical mechanism, a causal mapping relationship between the pressure difference between the inside and outside of the chamber and the sealing contact state of the cover is established to complete the physical correlation analysis. It should be noted that during the operation of the sealed storage chamber, the pressure difference between the inside and outside of the chamber exerts normal pressure (positive pressure) on the pressure cover and sealing structure, with no tangential friction (the sealing structure is in a static sealing state, with no relative sliding, and the preset installation pre-tightening force is only used for initial sealing; the dominant force during operation is the normal load derived from the pressure difference). The specific types of forces and their transmission paths are as follows: Types of core forces: Mechanical loads distributed along the normal direction. When the pressure inside the cavity is greater than the pressure outside the cavity, it is an internal pressure load; when the pressure inside the cavity is less than the pressure outside the cavity, it is an external pressure load. The mechanical loads act perpendicularly on the pressure cover and its sealing structure. The magnitude of the mechanical load is the product of the pressure difference between the inside and outside of the cavity and the equivalent pressure-bearing area. The equivalent pressure-bearing area is the effective area of ​​the pressurized cover and sealing structure that actually participates in the force under the current pressure difference between the inside and outside of the cavity. It is obtained by identifying the pressurized areas in the pressurized cover and sealing structure that are connected to the internal pressure of the cavity and calculating the projected area of ​​the pressurized areas in the normal direction of the pressurized cover and sealing structure. Force transmission path: The first step of mechanical load transmission: The pressure difference between the inside and outside of the cavity acts on the non-sealed end face of the pressurized cover, forming an overall normal load, which pushes the cover to move towards the sealing mating surface (internal pressure condition) or away from the sealing mating surface (external pressure condition). The second step of mechanical load transfer: The displacement tendency of the pressurized cover causes its sealing surface to squeeze the sealing structure, causing the sealing structure to undergo elastic compression deformation. The sealing structure rebounds due to deformation, forming a sealing contact reaction force, which acts in the opposite direction on the sealing surface of the cover. The third step of mechanical load transfer: The pressure cover forms a constraint with the chamber body through the sealing structure. The constraint force generated by the sealing structure achieves mechanical equilibrium. At this time, a stable contact pressure distribution is formed at the sealing contact interface. The pressure cover maintains a small relative displacement (matching the compression of the sealing structure), thus completing the transfer and balance of the entire force. The pressure difference between the inside and outside of the cavity is taken as the applied load on the pressurized cover and sealing structure, and the sealing contact state is taken as the structural response formed under the applied load. Under the same working conditions, the correspondence between the two is uniformly represented. Specifically, the sealing contact state of the cover (the proportion of sealing contact area, the contact pressure of the sealing area, the relative displacement of the cover, and the sealing compression) can be scaled and normalized. The sealing contact states of the cover with different dimensions and different physical meanings are established with the pressure difference between the inside and outside of the cavity under a unified state description dimension, and combined in a preset order, such as [pressure difference between the inside and outside of the cavity, contact pressure of the sealing area, proportion of sealing contact area, relative displacement of the cover, sealing compression], to form a pressure-sealing coupled state vector. The scale normalization of the sealing contact state of the cover is carried out by normalizing the standard deviation of each sealing contact state of the cover and mapping it to the interval [0,1]. The pressure-sealing coupling state vector serves as a unified description of the current pressure and sealing conditions of the sealed storage chamber. It is used to align with the pressure reference state corresponding to historical stable conditions to obtain a pressure deviation description reflecting the degree of pressure change and sealing contact change in the chamber. This provides a basic state input for the stress analysis of the cover and active pressurization adjustment.

[0023] Methods for obtaining pressure deviation descriptive quantities include: After aligning the obtained pressure-sealing coupling state vector with the preset pressure reference state vector, the difference is calculated to form the pressure deviation description. The preset pressure reference state vector is pre-established based on the historical stable operating conditions of the sealed storage chamber, including the corresponding pressure difference between the inside and outside of the chamber and typical values ​​of the sealing contact state of the cover. Among them, historical stable operating conditions refer to the operating conditions in which the pressure difference between the inside and outside of the sealed storage chamber and the sealing state are relatively stable and the fluctuation range is small during long-term operation. In order to obtain historical stable operating conditions, during the trial operation or experimental phase of the sealed storage chamber, the pressure information between the inside and outside of the chamber and the sealing contact state of the cover can be continuously collected and recorded in time series to form a continuous set of state vectors. In the state vector set, the time period in which the fluctuation of the pressure difference between the inside and outside of the cavity and the fluctuation of the sealing contact state of the cover are within the preset acceptable range is identified as the historical stable working condition; then, the arithmetic mean of the pressure difference between the inside and outside of the cavity and the sealing contact state of the cover within the corresponding time period of the historical stable working condition is extracted as a typical value to form the preset pressure reference state vector. The alignment process includes parameter order unification, dimension unification, and corresponding scale normalization, ensuring that the pressure-sealing coupling state vector and the preset pressure reference state vector can be compared under the same state description dimension.

[0024] Methods for constructing the force distribution of the cover zone include: Based on the structure and sealing area distribution of the cover, the pressure surface of the cover is divided into regions, and the cover is divided into stress regions with different pressure characteristics. Each stress region corresponds to the central pressure region of the cover (located in the center of the cover and less constrained by the seal) and the edge sealing region (close to the location of the sealing structure and more constrained by the seal). The structural morphology of the cover is not merely the outer outline of the cover, but a set of structural elements used to determine the pressure path and the range of force participation. Specifically, it includes: the outer outline of the cover (such as a circle, rectangle, or polygon, used to determine the basic projection range of the pressure action), thickness and thickness distribution (including whether there is a central thickened area, edge reinforcing ribs, or locally thinned areas; different thickness areas correspond to different structural stiffness and degree of force participation), force support and boundary constraint methods (such as the connection position between the cover and the cavity, fixed points, or restricted boundaries, used to define which areas can undergo effective force response under pressure), and surface functional structural zoning (such as planar areas, transition slope areas, or stepped areas; different surface morphologies will affect the effective pressure transmission direction and the calculation of the force-bearing area). The distribution of the sealing area is mainly used to reflect the constraint effect of the sealing structure on the force boundary of the cover. Specifically, it includes: the location of the sealing structure on the cover (such as the positional relationship of the sealing ring, sealing gasket, local annular or segmented arrangement), the coverage area (the size of the area occupied by the sealing structure on the surface of the cover, used to distinguish the pressure area from the sealed constraint area), and the force constraint boundary formed (the constraint formed by the sealing structure on the edge or local area of ​​the cover, causing some areas to be stressed or attenuated under pressure). For each stress-bearing area, the equivalent pressure-bearing area corresponding to the stress-bearing area is determined. The equivalent pressure-bearing area is the effective area that actually participates in the stress under the current pressure difference between the inside and outside of the pressure cover and the sealing structure. It is obtained by identifying the pressure-bearing areas in the pressure cover and sealing structure that are connected to the internal pressure of the cavity, and calculating the projected area of ​​the pressure-bearing areas in the normal direction of the pressure cover and sealing structure, so as to reflect the actual degree of stress participation of different stress-bearing areas under pressure. Based on the pressure difference between the inside and outside of the cavity in the pressure deviation description, combined with the equivalent pressure area corresponding to each stress area, and with the introduction of a correction coefficient for correction, the equivalent stress of each stress area is calculated separately, forming a stress distribution of the cover with regional differentiation.

[0025] For the The force-bearing regions are corresponding to the equivalent forces in each partition: ;in, Indicates in Time of the first The equivalent stress of each stress zone corresponds to a partition; Indicates the correction factor; Indicates in The internal pressure value of the chamber at any given time; Indicates in The external pressure value of the chamber at any given time; express The pressure difference between the inside and outside of the chamber at any given moment; Indicates the first The equivalent compressive area corresponding to each stress zone; It should be noted that: due to the differences in structural constraints and force transmission paths in different stress areas, if only the equivalent pressure area and the pressure difference between the inside and outside of the cavity are used to calculate the equivalent stress in each stress area, it is difficult to accurately reflect the actual stress situation in each stress area. Therefore, when calculating the equivalent stress in each stress area, a correction coefficient is introduced to make structural corrections to the theoretical stress results under ideal uniform pressure conditions. The correction coefficient can be obtained by dividing the stress area based on the structural form and sealing area distribution of the pressure cover under historical working conditions. The correction coefficient can be obtained by statistically analyzing the transmission ratio of mechanical load in different stress areas, so that it can reflect the force transmission efficiency and structural constraint characteristics of each stress area under actual working conditions.

[0026] Methods for obtaining the response status parameter set include: The equivalent stress results of each stress region are summarized, and the difference in equivalent stress between the edge sealing region and the central pressure region is calculated. The summarized results and the difference values ​​are integrated to form a set of response state parameters that includes the overall stress situation and the local stress differences.

[0027] Methods for obtaining the compensation pressure distribution include: Different sealing contact sampling points are selected within the sealing area of ​​the cover, and the local contact stress of each sealing contact sampling point is collected. Combined with the pressure difference between the inside and outside of the cavity, a sealing reliability index is constructed to characterize the safety margin of the current sealing contact stress relative to the pressure difference load. The sealing reliability index is: ;in, The sealing reliability index is used to characterize the sealing performance. At any given moment, the safety margin of the current sealing contact stress relative to the differential pressure load; An index representing a time point; Indicates the number of sealing contact sampling points involved in the sealing condition assessment; Indicates the index number of the sealed contact sampling point; Indicates the first Each sealed contact sampling point is located at Local contact stress at a given moment; With the primary control objective of achieving chamber pressure balance, the target differential pressure compensation amount is determined based on the pressure deviation descriptor. ;in, Indicates in The target differential pressure compensation amount used to achieve pressure balance at any given time is determined by the pressure deviation descriptor and is used to characterize the differential pressure amplitude that needs to be corrected under the current state. Indicates in The pressure deviation at any given moment is described by the quantity. This represents the proportional adjustment coefficient that maps the pressure deviation description to the target differential pressure compensation. It can be set according to the preset safety margin of the pressurization system. When the safety margin is high, the proportional adjustment coefficient can be increased to speed up the pressure compensation response. When the safety margin is low, the proportional adjustment coefficient can be decreased to reduce the pressure compensation response. The value range is [0,1], which is used to limit the proportion of the influence of pressure deviation on the differential pressure compensation amplitude, so as to achieve the stability and controllability of the pressure balance process; At the same time, the sealing reliability index is compared with the preset sealing reliability threshold. The sealing reliability index is used as a safety constraint for the compensation pressure adjustment. The target differential pressure compensation amount is restricted and corrected to obtain the compensation pressure that meets the requirements for maintaining sealing reliability. The compensation pressure is: ;in, This indicates the compensation pressure after correction for seal reliability constraints; This indicates a preset sealing reliability threshold. When the sealing reliability index is lower than this threshold, it means that the safety margin of the sealing area is insufficient, and continuing to apply the target compensation pressure may lead to sealing fatigue or failure. This represents the minimum value operator, used to select a more conservative compensation pressure amplitude between the target differential pressure compensation amount and the sealing reliability constraints, thereby achieving safety-limited pressure compensation.

[0028] Based on the summary results of the equivalent stress of each stress area of ​​the cover body contained in the response state parameter set, and the difference value of the equivalent stress of the edge sealing area and the central pressure area, the regional weight of each stress area is set; based on the regional weight, the compensation pressure is mapped to the corresponding stress area to form a compensation pressure distribution that matches the stress characteristics of the cover body, and the compensation pressure allocated to the edge sealing area is limited to be less than or equal to the compensation pressure allocated to the central pressure area.

[0029] The following technical problems in the existing technology have been solved: Existing pressurization or pressure balancing schemes for sealed chambers mostly use the pressure difference between the inside and outside of the chamber as the sole basis for adjustment, without incorporating the local stress state of the sealing area of ​​the cover into the pressure adjustment decision process. This can easily lead to excessive pressurization in order to eliminate the pressure difference, resulting in problems such as fatigue, crushing or premature failure of the seal.

[0030] Existing technologies typically treat the cover or sealing structure as a whole under pressure, without distinguishing and modeling the contact stress at different locations within the sealing area. This fails to reflect the stress difference between the edge sealing area and the central pressure area, resulting in a lack of targeted pressure compensation strategies and a significant impact on sealing reliability due to structural inhomogeneity.

[0031] Traditional solutions often determine the compensation pressure based solely on the target pressure difference or empirical thresholds, making it difficult to promptly identify potential sealing risks from continued pressurization and posing potential safety hazards. Existing pressurized covers mostly employ uniform or fixed-ratio pressure distribution methods, failing to consider the engineering characteristics of the sealing edge area, which is more sensitive to overload. This easily leads to stress concentration at the sealing edge, reducing overall seal life and reliability.

[0032] The advantages over existing technologies are as follows: By introducing a sealing reliability index based on sealing contact stress and chamber pressure difference, the sealing safety margin is simultaneously evaluated during pressure compensation calculation. This allows pressure regulation to move beyond simply eliminating pressure difference and achieve pressure balance while ensuring sealing reliability, fundamentally avoiding the risk of seal failure caused by excessive pressurization. By selecting multiple sealing contact sampling points in the sealing area and constructing a sealing reliability index based on their local contact stress, the sealing condition is transformed from traditional experience-based judgment into a quantifiable and comparable engineering indicator. By linking the target pressure difference compensation amount with the sealing reliability threshold, the compensation pressure amplitude is automatically reduced when the sealing safety margin is insufficient. This prevents seal fatigue, plastic deformation, or failure caused by improper pressure regulation strategies at the system level, improving system operational safety.

[0033] Methods for gradually driving the pressure cap to implement active pressure regulation include: The compensation pressure distribution is mapped to target pressurization loads on different stress areas, and a phased pressurization adjustment path is constructed based on the target pressurization loads to transition from the current pressurization state to the target pressurization state. During the pressurization adjustment process, the target pressurization load is decomposed into continuously increasing pressure increments according to the maximum pressure amplitude allowed in a single pressurization process, and applied to the stress area step by step in a preset order. The pressure increments can be set to equal increments or unequal increments according to the pressurization requirements of different pressurization stages or different stress areas. The essence of both is a gradual decomposition of the target pressurization load. The maximum pressure amplitude allowed in a single pressurization process is obtained by statistically analyzing the average pressure change amplitude that did not cause sealing failure or abnormal pressure fluctuations during multiple pressurization adjustments based on historical stable operating conditions. This average value is used as the maximum pressure amplitude allowed in a single pressurization process. The preset sequence can be pre-set by staff based on actual needs or expert experience. For example, it can be set to gradually apply pressure to the edge sealing area first, and then apply pressure to the central pressure area in a progressive manner. After each pressure increment is applied, the pressurization effect is checked based on the response state parameter set of the pressurized cover. Only when the pressurization state meets the requirements of pressure balance and sealing stability will the next pressure increment be applied, thereby driving the pressurized cover to complete the active pressurization adjustment in a gradual manner.

[0034] It should be noted that the pressure balance and sealing stability requirements refer to the fact that, during the current pressurization stage, the pressure difference between the inside and outside of the chamber meets the preset stable range requirements of the target pressure difference compensation amount, and the sealing reliability index of the sealing area is not lower than the preset sealing reliability threshold, so as to ensure that the safety and stability of the sealing structure is maintained while achieving pressure correction. The preset stable range of the target differential pressure compensation amount refers to the allowable differential pressure deviation range defined in the positive and negative directions with the target differential pressure compensation amount as the center. When the actual differential pressure inside and outside the chamber is within this range, the current pressure state is considered to have reached stability.

[0035] Methods for jointly determining the current chamber pressure status include: Within a continuous adjustment cycle, the pressure deviation descriptive quantity corresponding to each adjustment cycle is obtained, and a pressure deviation change sequence is constructed in chronological order. Based on the pressure deviation change sequence, the difference between the pressure deviation descriptive quantities between adjacent adjustment cycles is calculated to obtain the change amplitude of pressure deviation, and it is determined whether the change amplitude shows a trend of continuously decreasing as the adjustment cycle progresses. When the magnitude of pressure deviation changes continuously decreases as the adjustment cycle progresses, it is further determined whether the magnitude of change is less than the preset magnitude threshold, and at the same time, it is determined whether the pressure deviation description in consecutive different adjustment cycles falls within the preset stable range centered on the target differential pressure compensation amount. When the pressure deviation descriptive value falls within the preset stable range centered on the target differential pressure compensation value in different consecutive adjustment cycles, and the change in the pressure deviation descriptive value does not exceed the preset change range threshold, it is determined that the current sealed storage chamber is in a pressure balance state; otherwise, it is determined that the current sealed storage chamber is in a non-pressure balance state.

[0036] Methods for adaptive switching between pressure maintenance and active pressurization based on joint determination results include: When it is determined that the current sealed storage chamber is in a pressure balance state, it enters the pressure holding mode, stops applying new compensation pressure to the pressurized cover, and only maintains the current pressurization state. When it is determined that the current sealed storage chamber is in a non-pressure balance state, it automatically switches to the active pressurization mode and recalculates the compensation pressure distribution; according to the new compensation pressure distribution, it drives the pressurization cover to perform active pressurization adjustment to gradually correct the pressure deviation inside and outside the chamber.

[0037] During the active pressurization process, the pressure deviation description is continuously collected according to the preset adjustment cycle. After each subsequent adjustment cycle, a joint judgment is performed again. When the joint judgment result changes from a non-pressure balance state to a pressure balance state, the active pressurization process is automatically terminated and the system switches back to pressure holding mode.

[0038] By cyclically switching between pressure holding mode and active pressurization regulation mode based on joint judgment results, a closed-loop adaptive regulation mechanism is formed, thereby continuously maintaining the pressure balance of the sealed storage chamber under changing operating conditions or external disturbances; the preset regulation cycle can be preset by the staff according to actual work needs or expert experience.

[0039] The preset sealing reliability threshold is set by the staff. By collecting different sealing reliability indices, the average value of multiple sealing reliability indices is taken as the preset sealing reliability threshold; similarly, the preset variation range threshold is set.

[0040] In this embodiment, by performing a zonal analysis of the cover structure and sealing area, and introducing an equivalent pressure area and a correction coefficient, the actual stress situation of each stress area of ​​the cover can be accurately reflected, the stress difference between the central pressure area and the edge sealing area can be distinguished, and local overload or sealing failure can be avoided. The resulting zoned force distribution can serve as the basic input for active pressurization control, enabling the system to apply differentiated compensation pressure to different areas, achieving simultaneous maintenance of pressure balance and sealing reliability. The related technical solutions are not only applicable to conventional circular or rectangular covers, but can also be extended to complex polygonal or irregularly shaped covers, and are compatible with different sealing layouts (such as annular, segmented, or partial seals), exhibiting strong versatility and applicable to various sealed storage chambers and pressure control needs under different operating conditions. By introducing sealing contact stress and chamber pressure difference to construct a sealing reliability index, the sealing safety margin is evaluated simultaneously in the pressure compensation calculation, so that pressure regulation can achieve pressure balance under the premise of ensuring sealing reliability. By sampling the sealing area to construct quantitative indicators and linking the target pressure difference compensation with the sealing reliability threshold, the compensation pressure amplitude can be automatically limited, thereby effectively preventing sealing fatigue, plastic deformation or failure caused by excessive pressure and improving the system operation safety.

[0041] Example 2 Please see Figure 2 As shown, for parts not described in detail in this embodiment, please refer to the description in Embodiment 1. A method for pressure balancing of an active pressurized cover for a sealed storage chamber is provided, including: S1. During the operation of the sealed storage chamber, acquire the internal and external pressure information and the sealing contact state of the cover; based on the physical relationship between the internal and external pressure difference and the sealing contact state of the cover, construct a pressure-sealing coupling state vector and align it with the preset pressure reference state to acquire the pressure deviation description quantity. S2. Based on the pressure deviation description, combined with the cover structure and sealing area distribution, construct the cover partition force distribution, and distinguish the force difference between the edge sealing area and the central pressure area to form a response state parameter set; S3. Based on the response state parameter set, calculate the compensation pressure distribution required to achieve pressure balance and maintain sealing reliability, and drive the pressure cover to implement active pressure adjustment in a progressive manner. S4. Based on the changing trend of pressure deviation descriptive quantity and preset stable range within the continuous adjustment cycle, the current chamber pressure state is jointly determined; based on the joint determination result, adaptive switching between pressure maintenance and active pressurization adjustment is performed to maintain the pressure balance of the sealed storage chamber.

[0042] Since the electronic device described in this embodiment is the one used to implement the active pressure balancing system for a sealed storage chamber based on the active pressure balancing system for a sealed storage chamber described in this application, those skilled in the art can understand the specific implementation methods and various variations of the electronic device in this embodiment. Therefore, how the electronic device implements the method in this application will not be described in detail here. Any electronic device used by those skilled in the art to implement the active pressure balancing system for a sealed storage chamber based on the active pressure balancing system for a sealed storage chamber described in this application falls within the scope of protection of this application.

[0043] The above formulas are all dimensionless calculations. The formulas are derived from software simulations based on a large amount of collected data to obtain the most recent real-world results. The preset parameters and thresholds in the formulas are set by those skilled in the art according to the actual situation.

[0044] The above description is merely a preferred embodiment of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for users of ordinary technical skills, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A pressure balancing system for an active pressurized cover of a sealed storage chamber, characterized in that, include: The pressure sensing module acquires internal and external pressure information and the sealing contact status of the cover during the operation of the sealed storage chamber. Based on the physical relationship between the pressure difference between the inside and outside of the cavity and the sealing contact state of the cover, a pressure-sealing coupled state vector is constructed and aligned with a preset pressure reference state to obtain the pressure deviation description. The stress analysis module, based on the pressure deviation descriptor, combined with the cover structure morphology and sealing area distribution, constructs the stress distribution of the cover partitions, distinguishes the stress difference between the edge sealing area and the central pressure area, and forms a set of response state parameters; The pressurization guidance module calculates the compensation pressure distribution required to achieve pressure balance and maintain sealing reliability based on the response state parameter set, and drives the pressurization cover to implement active pressurization adjustment in a progressive manner. The adaptive balancing module jointly determines the current chamber pressure state based on the changing trend of the pressure deviation descriptor and the preset stable range within the continuous adjustment cycle; based on the joint determination result, it adaptively switches between pressure maintenance and active pressurization adjustment, thereby maintaining the pressure balance of the sealed storage chamber.

2. The active pressurization cover pressure balancing system for a sealed storage chamber according to claim 1, characterized in that, The pressure information inside and outside the cavity includes the pressure value inside the cavity and the pressure value outside the cavity; the sealing contact state of the cover includes the sealing contact area ratio, the contact pressure of the sealing area, the relative displacement of the cover, and the sealing compression.

3. The active pressurization cover pressure balancing system for a sealed storage chamber according to claim 2, characterized in that, The method for constructing the pressure-sealing coupled state vector includes: The pressure difference between the inside and outside of the chamber is obtained by calculating the difference between the internal and external pressure values. Based on the mechanical mechanism of the pressure difference between the inside and outside of the chamber on the pressure cover and sealing structure, the physical correlation between the pressure difference between the inside and outside of the chamber and the sealing contact state of the cover is analyzed. The pressure difference between the inside and outside of the cavity is used as the applied load on the pressure cover and sealing structure, and the sealing contact state is used as the structural response formed under the applied load. The correspondence between the two is uniformly represented under the same working conditions, and they are combined in a preset order to form a pressure-sealing coupling state vector.

4. The active pressurization cover pressure balancing system for a sealed storage chamber according to claim 3, characterized in that, The method for obtaining the pressure deviation descriptive quantity includes: After aligning the obtained pressure-sealing coupling state vector with the preset pressure reference state vector, the difference is calculated to form the pressure deviation description. The preset pressure reference state vector is pre-established based on the historical stable operating conditions of the sealed storage chamber, including typical values ​​of the corresponding pressure difference between the inside and outside of the chamber and the sealing contact state of the cover.

5. The active pressurization cover pressure balancing system for a sealed storage chamber according to claim 4, characterized in that, The method for constructing the force distribution of the cover body partitions includes: Based on the structural morphology of the cover and the distribution of the sealing area, the pressure surface of the cover is divided into regions, and the cover is divided into stress regions with different pressure characteristics. Each stress region corresponds to the central pressure region and the edge sealing region of the cover. For each stress-bearing region, the equivalent pressure-bearing area corresponding to the stress-bearing region is determined. The equivalent pressure-bearing area is used to characterize the effective area of ​​the current stress-bearing region that actually participates in the stress under the action of the pressure difference between the inside and outside of the cavity. Based on the pressure difference between the inside and outside of the cavity in the pressure deviation description, combined with the equivalent pressure-bearing area corresponding to each stress-bearing region, and a correction coefficient is introduced for correction, the equivalent stress of each stress-bearing region is calculated, forming a stress distribution of the cover with regional differentiation.

6. The active pressurization cover pressure balancing system for a sealed storage chamber according to claim 5, characterized in that, The method for obtaining the response status parameter set includes: The equivalent stress results of each stress region are summarized, and the difference in equivalent stress between the edge sealing region and the central pressure region is calculated. The summarized results and the difference values ​​are integrated to form a set of response state parameters.

7. The active pressurization cover pressure balancing system for a sealed storage chamber according to claim 6, characterized in that, The method for obtaining the compensation pressure distribution includes: Different sealing contact sampling points were selected within the sealing area of ​​the cover, and the local contact stress at each sealing contact sampling point was collected. Combined with the pressure difference between the inside and outside of the cavity, a sealing reliability index was constructed. With the primary control objective of achieving chamber pressure balance, the target differential pressure compensation amount is determined based on the pressure deviation descriptor. Simultaneously, the sealing reliability index is compared with the preset sealing reliability threshold, and the sealing reliability index is used as a safety constraint condition for adjusting the compensation pressure. The target differential pressure compensation amount is then subject to restrictive correction to obtain the compensation pressure that meets the requirements for maintaining sealing reliability. Based on the summary results of the equivalent stress of each stress area of ​​the cover body contained in the response state parameter set, and the difference value of the equivalent stress of the edge sealing area and the central pressure area, the regional weight of each stress area is set; based on the regional weight, the compensation pressure is mapped to the corresponding stress area to form a compensation pressure distribution that matches the stress characteristics of the cover body, and the compensation pressure allocated to the edge sealing area is limited to be less than or equal to the compensation pressure allocated to the central pressure area.

8. The active pressurization cover pressure balancing system for a sealed storage chamber according to claim 7, characterized in that, The method for gradually driving the pressure cover to implement active pressure adjustment includes: The compensation pressure distribution is mapped to the target pressurization load on different stress areas, and a staged pressurization adjustment path is constructed based on the target pressurization load to transition from the current pressurization state to the target pressurization state. During the pressurization adjustment process, the target pressurization load is decomposed into continuously increasing pressure increments and applied to the stress areas step by step in a preset order. After each pressure increment is applied, the pressurization effect is checked based on the response state parameter set of the pressurized cover. Only when the pressurization state meets the requirements of pressure balance and sealing stability will the next pressure increment be applied, thereby driving the pressurized cover to complete the active pressurization adjustment in a gradual manner.

9. The active pressurization cover pressure balancing system for a sealed storage chamber according to claim 8, characterized in that, The method for jointly determining the current chamber pressure state includes: Within a continuous adjustment cycle, the pressure deviation descriptive quantity corresponding to each adjustment cycle is obtained, and a pressure deviation change sequence is constructed in chronological order. Based on the pressure deviation change sequence, the difference between the pressure deviation descriptive quantities between adjacent adjustment cycles is calculated to obtain the change amplitude of pressure deviation, and it is determined whether the change amplitude shows a trend of continuously decreasing as the adjustment cycle progresses. When the magnitude of pressure deviation changes continuously decreases as the adjustment cycle progresses, it is further determined whether the magnitude of change is less than the preset magnitude threshold, and at the same time, it is determined whether the pressure deviation description in consecutive different adjustment cycles falls within the preset stable range centered on the target differential pressure compensation amount. When the pressure deviation descriptive value falls within the preset stable range centered on the target differential pressure compensation value in different consecutive adjustment cycles, and the change in the pressure deviation descriptive value does not exceed the preset change range threshold, it is determined that the current sealed storage chamber is in a pressure balance state; otherwise, it is determined that the current sealed storage chamber is in a non-pressure balance state.

10. The active pressurization cover pressure balancing system for a sealed storage chamber according to claim 9, characterized in that, The method for adaptively switching between pressure maintenance and active pressurization regulation based on joint determination results includes: When it is determined that the current sealed storage chamber is in a pressure balance state, it enters the pressure holding mode, stops applying new compensation pressure to the pressurized cover, and only maintains the current pressurization state. When it is determined that the current sealed storage chamber is in a non-pressure balance state, it automatically switches to active pressurization mode and recalculates the compensation pressure distribution; according to the new compensation pressure distribution, it drives the pressurization cover to perform active pressurization adjustment to gradually correct the pressure deviation inside and outside the chamber; During the active pressurization process, the pressure deviation description is continuously collected according to the preset adjustment cycle. After each subsequent adjustment cycle, a joint judgment is performed again. When the joint judgment result changes from a non-pressure balance state to a pressure balance state, the active pressurization process is automatically terminated and the system switches back to pressure holding mode.

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