Air compressor system for multi-axle engineering vehicle and control method

Abstract

The invention discloses an air compressor system for a multi-axle engineering vehicle and a control method, and relates to the technical field of air compressors of the multi-axle engineering vehicle, the air compressor system for the multi-axle engineering vehicle comprises an air storage tank, an air compression structure, a sensing module and a control module, the air compression structure comprises a first air outlet end and a second air outlet end, the first air outlet end and the second air outlet end are both communicated with the air inlet end of the air storage tank; the sensing module is used for sensing the internal pressure value of the air storage tank and the output air pressure value of the second air outlet end; the air compression structure and the sensing module are electrically connected with the control module; according to the technical scheme, through cooperation of the sensing module, the control module and the air compression structure, the air compression structure can supply air to the air storage tank through the first air outlet end and / or the second air outlet end according to the actual situation of the multi-axle engineering vehicle, the problem that the braking effect is unstable due to the fact that the air pressure drops too fast is solved, and the braking efficiency is improved. And the working efficiency and the safety of the multi-axle engineering vehicle are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air compressors for multi-axle engineering vehicles, and in particular to an air compressor system and a control method for multi-axle engineering vehicles. Background Art

[0002] Multi-axle engineering vehicles usually refer to those engineering vehicles with multiple axles (or bridges). These vehicles are designed to work under heavy loads and complex working conditions, and are usually used in construction, mining, heavy transportation and other fields. The air tank (also called air cylinder or gas tank) in multi-axle engineering vehicles is mainly used in the following aspects: storing air compressed by the air compressor and releasing it quickly when needed to drive the braking system; used to adjust the height of the vehicle suspension system to adapt to different road conditions and load conditions; used to drive various auxiliary equipment and systems.

[0003] However, the air compressor installed on the vehicle engine in multi-axle engineering vehicles has its air-inflating capacity limited by the engine performance and compressor specifications. The output of the air compressor often cannot meet the high-frequency and large-capacity air demand of multi-axle engineering vehicles, resulting in unstable pressure in the braking system during continuous use, affecting the braking effect and safety. Summary of the invention

[0004] The main purpose of the present invention is to propose an air compressor system and control method for multi-axle engineering vehicles, aiming to solve the technical problem that the air compressors of multi-axle engineering vehicles in the prior art often cannot meet the high-frequency and large-capacity air demand of multi-axle engineering vehicles, resulting in poor braking effect.

[0005] To achieve the above object, the present invention provides an air compressor system for a multi-axle engineering vehicle, comprising:

[0006] gas tank;

[0007] An air compression structure, the air compression structure comprising a first air outlet and a second air outlet, the first air outlet and the second air outlet are both connected to the air inlet of the air storage tank;

[0008] A sensing module, the sensing module comprising a first sensing unit and a second sensing unit, the first sensing unit being used to sense the internal pressure value of the gas storage tank, and the second sensing unit being used to sense the output air pressure value of the second air outlet;

[0009] A control module, the air compression structure and the sensing module are both electrically connected to the control module, and the control module is used to control the air compression structure to supply air to the air storage tank through the first air outlet and / or the second air outlet according to the internal pressure value of the air storage tank and the output air pressure value of the second air outlet.

[0010] In one embodiment, the air compression structure includes a vehicle-mounted air compression mechanism and an external air compression mechanism, the vehicle-mounted air compression mechanism has the first air outlet end, the external air compression mechanism has the second air outlet end, the first air outlet end and the second air outlet end are arranged in parallel, and the first air outlet end and the second air outlet end are both connected to the air inlet end of the air storage tank through a four-circuit protection valve.

[0011] In one embodiment, the external air compression mechanism includes a driving component and an air compressor component, and the external air compression mechanism includes a hydraulic pump, a hydraulic motor and an external air compressor, and the external air compressor has a power input end, an air input end and an air output end, wherein the hydraulic pump is power-connected to the hydraulic motor, the output shaft of the hydraulic motor is power-connected to the power input end of the external air compressor, the air output end of the external air compressor forms the second air outlet end, and the hydraulic pump is electrically connected to the control module, and the control module is used to adjust the power output power of the hydraulic pump to the hydraulic motor according to the output air pressure value of the second air outlet end.

[0012] In one embodiment, a first condenser and a first dryer are connected on a passage between the second gas outlet and the gas storage tank.

[0013] In one embodiment, the air input end is connected to a second dryer.

[0014] In one embodiment, the external air compressor mechanism also includes a switch, the hydraulic pump is electrically connected to the switch, and the control module is electrically connected to the switch. The control module is used to control the opening and closing of the switch according to the internal pressure value of the air storage tank and / or the output air pressure value of the second air outlet, so as to control the start and stop of the hydraulic pump accordingly.

[0015] In one embodiment, a second condenser and a third dryer are connected on a passage between the first gas outlet and the gas storage tank.

[0016] The present invention further proposes a method for controlling an air compressor system for a multi-axle engineering vehicle, using the air compressor system for a multi-axle engineering vehicle as described above, the method for controlling an air compressor system for a multi-axle engineering vehicle comprises:

[0017] Starting the air compression structure to enable the first air outlet to supply air to the air inlet of the air storage tank;

[0018] Obtaining the internal pressure value of the gas storage tank and the output pressure value of the second gas outlet through the first sensing unit and the second sensing unit respectively;

[0019] The control module determines whether the internal pressure value of the gas storage tank and / or the output pressure value of the second gas outlet meet a preset condition;

[0020] If not, the control module controls the air compression structure to supply air to the air storage tank through the first air outlet end and / or the second air outlet end.

[0021] In one embodiment, the step of the control module determining whether the internal pressure value of the gas storage tank and / or the output pressure value of the second gas outlet meets a preset condition comprises:

[0022] The control module determines whether the internal pressure value of the gas storage tank and / or the output pressure value of the second gas outlet is greater than or equal to 8 bar;

[0023] If not, the preset condition is not met.

[0024] In one embodiment, after the step of: if not, the control module controls the air compression structure to supply air to the air storage tank through the first air outlet and / or the second air outlet, the air compressor system control method for a multi-axle engineering vehicle further includes:

[0025] The control module analyzes the real-time change in the internal pressure value of the gas storage tank and / or the real-time change in the output pressure value of the second gas outlet to obtain a control condition;

[0026] The control module adjusts the power output of the second gas outlet according to the control condition until the internal pressure value of the gas storage tank and the output gas pressure value of the second gas outlet both meet the preset condition.

[0027] The technical solution of the present invention optimizes the air supply process of the air compressor structure through the coordination between the sensing module, the control module and the air compressor structure, so that the air compressor structure can supply air to the air tank using the first air outlet and / or the second air outlet according to the actual situation of the multi-bridge engineering vehicle, so that the inflation process of the air tank is more efficient and the air replenishment time is significantly shortened. In addition, by regulating the operating state of the air compressor structure, the excessive load of the equipment is reduced, the service life of the air compressor and other pneumatic components is extended, and the air pressure after continuous braking can be quickly restored, avoiding the problem of unstable braking effect caused by too fast a drop in air pressure, meeting the high-frequency and large-capacity air demand of the multi-bridge engineering vehicle, and ensuring that the system can still operate stably under high-frequency and large-capacity air usage conditions, shortening the waiting time when the vehicle is started or restarted, and improving work efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0029] Figure 1 A schematic structural diagram of an embodiment of an air compressor system for a multi-axle engineering vehicle provided by the present invention;

[0030] Figure 2 It is a structural schematic diagram of an embodiment of a control module and a sensing module according to the present invention;

[0031] Figure 3 A flow chart of an embodiment of an air compressor system control method for a multi-axle engineering vehicle provided by the present invention;

[0032] Figure 4 for Figure 3 Detailed flow chart of step S20;

[0033] Figure 5 for Figure 3 Schematic diagram of the detailed process after step S40.

[0034] Description of Figure Numbers:

[0035] 100, air storage tank; 200, air compressor structure; 300, sensing module; 400, control module; 500, four-circuit protection valve; 600, switch; 210, vehicle-mounted air compressor mechanism; 220, external air compressor mechanism; 221, hydraulic pump; 222, hydraulic motor; 223, external air compressor; 310, first sensing unit; 320, second sensing unit; 71, first condenser; 81, first dryer; 82, second dryer; 72, second condenser; 83, third dryer.

[0036] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] In the prior art, the air compressors installed on the engines of multi-bridge engineering vehicles have air-inflating capabilities limited by engine performance and compressor specifications. The output of the air compressors cannot meet the high-frequency and large-volume air demand of multi-bridge engineering vehicles. For example, the air brake system and auxiliary pneumatic system (such as pneumatic suspension, pneumatic tools, etc.) of multi-bridge engineering vehicles have a large demand for compressed air. Due to the complexity and diversity of the vehicles, a large amount of compressed air is required to maintain the normal operation of the system in actual work. In order to meet the high air demand and maintain system stability, multi-bridge engineering vehicles are usually equipped with multiple air tanks. These air tanks require sufficient compressed air to maintain system pressure, thereby increasing the load of the air compressor. In addition, the air compressor takes a long time to complete the air supply process for multiple air tanks, resulting in the vehicle having to wait for a long time when starting or restarting, affecting work efficiency. After frequent braking operations, the air pressure in the air tank will drop rapidly. Due to the limited air-inflating capacity of the air compressor, the air pressure recovery speed is slow, which will also cause the pressure of the brake system to be unstable during continuous use, affecting the braking effect and safety.

[0041] In order to solve this technical problem, the present invention proposes an air compressor system and a control method for a multi-axle engineering vehicle.

[0042] See also Figure 1 and Figure 2In one embodiment of the present invention, the air compressor system for a multi-axle engineering vehicle includes an air tank 100, an air compression structure 200, a sensing module 300 and a control module 400. The air compression structure 200 includes a first air outlet and a second air outlet, and the first air outlet and the second air outlet are both connected to the air inlet of the air tank 100; the sensing module 300 includes a first sensing unit 310 and a second sensing unit 320, the first sensing unit 310 is used to sense the internal pressure value of the air tank 100, and the second sensing unit 320 is used to sense the output air pressure value of the second air outlet; the air compression structure 200 and the sensing module 300 are both electrically connected to the control module 400, and the control module 400 is used to control the air compression structure 200 to supply air to the air tank 100 through the first air outlet and / or the second air outlet according to the internal pressure value of the air tank 100 and the output air pressure value of the second air outlet.

[0043] Specifically, Figure 1 The continuous lines with solid arrows are the pipes used for air flow in this system. Figure 1 The dotted lines without thin arrows are electrical connection lines. The air compression structure 200 is responsible for generating and delivering compressed air to the air tank 100. The air tank 100 is connected to the first air outlet and the second air outlet through pipelines, and is used to store compressed air to meet the high air consumption of the vehicle. The sensing module 300 is used to monitor the air pressure state in the system to ensure that the air compression structure 200 can be adjusted according to demand. The first sensing unit 310 is used to monitor the pressure value inside the air tank 100 to ensure that the internal air pressure value of the air tank 100 is greater than or equal to 8 bar. The second sensing unit 320 is used to monitor the output air pressure value of the second air outlet to ensure that the output air pressure value is greater than or equal to 8 bar to ensure stable air supply. The control module 400 is used to receive and process data from the first sensing unit 310 and the second sensing unit 320, and control the start and stop of the air compression structure 200 according to the internal pressure value of the air storage tank 100 and the output air pressure value of the second air outlet, to ensure that the air compression structure 200 supplies air to the air storage tank 100 through the first air outlet and / or the second air outlet.

[0044] More specifically, the first sensing unit 310 in the sensing module 300 continuously monitors the internal pressure value of the air tank 100, and the second sensing unit 320 continuously monitors the output air pressure value of the second air outlet, and transmits real-time data to the control module 400. The control module 400 determines whether the air tank 100 needs to be supplemented with compressed air according to the pressure value provided by the sensing module 300. If the internal pressure of the air tank 100 is lower than the set value, the control module 400 will start the air compression structure 200 to inflate the air tank 100; when the pressure reaches the set value, the control module 400 will stop the operation of the air compression structure 200. Based on actual needs, the control module 400 selects the corresponding air supply mode to control the air compression structure 200 to supply air to the air tank 100 through the first air outlet and / or the second air outlet, so as to ensure an efficient air supply process and improve the air pressure stability of the brake system.

[0045] It should be noted that the interaction between the air compressor structure 200, the sensing module 300 and the control module 400 is a prior art. And a plurality of air compressor systems for multi-axle engineering vehicles can be installed on the same multi-axle engineering vehicle.

[0046] In the technical solution provided by the present invention, the air supply process of the air compression structure 200 is optimized through the cooperation between the sensing module 300, the control module 400 and the air compression structure 200, so that the air compression structure 200 can supply air to the air tank 100 using the first air outlet end and / or the second air outlet end according to the actual situation of the multi-bridge engineering vehicle, so that the inflation process of the air tank 100 is more efficient, and the air replenishment time is significantly shortened. In addition, by adjusting the operating state of the air compression structure 200, the excessive load of the equipment is reduced, the service life of the air compressor and other pneumatic components is extended, and the air pressure after continuous braking can be quickly restored, avoiding the problem of unstable braking effect caused by too fast air pressure drop, meeting the high-frequency and large-capacity air demand of the multi-bridge engineering vehicle, and ensuring that the system can still operate stably under high-frequency and large-capacity air usage conditions, shortening the waiting time when the vehicle is started or restarted, and improving work efficiency and safety.

[0047] As an optional implementation of this embodiment, when the internal air pressure value is less than or equal to 8.5 bar, the control module 400 controls the air compression structure 200 to start the first air outlet to supply air to the air inlet of the air tank 100. When the internal air pressure value is less than or equal to 8 bar, the control module 400 controls the air compression structure 200 to start the second air outlet to assist the first air outlet to jointly supply air to the air inlet of the air tank 100 until the internal pressure value or the output air pressure value is greater than or equal to 10 bar. Specifically, when the vehicle is started or restarted, the internal air pressure value of the air tank 100 may be low. When the sensing module 300 detects that the internal air pressure value is less than or equal to 8.5 bar, the control module 400 immediately controls the air compression structure 200 to start the first air outlet, so that the first air outlet starts to supply air to the air tank 100, and gradually increases the internal air pressure of the air tank 100. If in the initial gas supply stage, due to high frequency of gas use or other reasons, the internal air pressure of the gas tank 100 continues to drop to 8 bar or below, the control module 400 will start the second gas outlet. At this time, the two gas outlets (the first gas outlet and the second gas outlet) of the air compression structure 200 work simultaneously to quickly supply gas to the gas tank 100 to increase the internal air pressure value as soon as possible. When the internal air pressure value or the output air pressure value of the gas tank 100 rises to greater than or equal to 10 bar, the control module 400 will stop the gas supply operation of the air compression structure 200, and the system enters the standby state to keep the gas tank 100 at a higher air pressure level to cope with subsequent gas demand. This embodiment optimizes the operating efficiency of the air compression structure 200 by starting the first gas outlet and the second gas outlet in stages. In the initial stage, only the first gas outlet is started to reduce unnecessary energy consumption; when the air pressure is seriously insufficient, the addition of the auxiliary gas outlet can quickly improve the gas supply efficiency. The multi-stage gas supply strategy is adopted to ensure the stability of the gas tank 100 at different pressure levels. Especially when the air pressure is low, the air supply capacity is quickly increased to prevent the air pressure from being too low and affecting the normal operation of the system, and the air pressure of the air storage tank 100 is quickly restored to reduce the waiting time when the vehicle is started or restarted, thereby improving work efficiency. At the same time, a high air pressure level is maintained to ensure the stability and safety of the air brake system when it is frequently used. In addition, the segmented air supply strategy effectively reduces the overall energy consumption of the air compression structure 200. The second air outlet is only started when necessary, which reduces the operating cost of the system.

[0048] As another optional implementation of this embodiment, when the internal air pressure value is less than or equal to 8 bar, the control module 400 controls the air compression structure 200 to start the first air outlet end and the second air outlet end to jointly supply air to the air inlet end of the air storage tank 100 until the internal pressure value or the output air pressure value is greater than or equal to 10 bar. Specifically, when the vehicle is started or in operation, the internal air pressure value of the gas tank 100 may drop to 8 bar or below due to various reasons (such as continuous braking operation, high gas demand, etc.). The first sensing unit 310 in the sensing module 300 continuously monitors the internal air pressure value of the gas tank 100 and transmits the data to the control module 400. When the control module 400 receives a signal that the internal air pressure value is less than or equal to 8 bar, it immediately controls the air compression structure 200 to start the first air outlet and the second air outlet at the same time, so that the two air outlets supply air to the gas tank 100 at the same time, accelerating the air pressure recovery process. When the internal air pressure value or the output air pressure value of the gas tank 100 rises to greater than or equal to 10 bar, the control module 400 stops the air supply operation of the air compression structure 200, and the system enters a standby state to keep the gas tank 100 at a higher air pressure level to cope with subsequent gas demand. This embodiment can quickly increase the air pressure of the air tank 100 and shorten the recovery time by simultaneously starting the first air outlet and the second air outlet when the air pressure value inside the air tank 100 is low. The strategy of supplying air at the dual air outlets at the same time greatly improves the air supply efficiency of the air compression structure 200 and responds to and meets high air demand more quickly. The air pressure of the air tank 100 is quickly restored to ensure the stability of the system under frequent air use or high air demand, and reduce system failures or performance degradation caused by insufficient air pressure. By accelerating the recovery of air pressure, the waiting time of the vehicle when starting or restarting is reduced, and work efficiency is improved. At the same time, a high air pressure level is maintained to ensure the stability and safety of the air brake system. Although the simultaneous activation of the dual air outlets may increase instantaneous energy consumption, since the rapid recovery of air pressure can reduce the overall operating time of the system, it still helps to optimize energy consumption management in the long run.

[0049] As another optional implementation of this embodiment, when the internal air pressure value is less than or equal to 8.5 bar, the control module 400 controls the air compression structure 200 to start the first air outlet or the second air outlet to supply air to the air inlet of the air storage tank 100 until the internal pressure value or the output air pressure value is greater than or equal to 10 bar. This embodiment ensures the stability of the system under frequent air use or high air demand, reduces the risk of system failure or performance degradation caused by insufficient air pressure, and only starts one air outlet to supply air, thereby reducing the energy consumption of the system and optimizing energy utilization.

[0050] Please continue reading Figure 1There are many forms of implementation of the air compression structure 200. In an embodiment of the present invention, the air compression structure 200 includes a vehicle-mounted air compression mechanism 210 and an external air compression mechanism 220. The vehicle-mounted air compression mechanism 210 has a first air outlet end, and the external air compression mechanism 220 has a second air outlet end. The first air outlet end and the second air outlet end are arranged in parallel, and the first air outlet end and the second air outlet end are both connected to the air inlet end of the air storage tank 100 through a four-circuit protection valve 500.

[0051] Specifically, the on-board air compressor 210 provides the main compressed air supply when the vehicle is driving normally, and delivers air to the air tank 100 through the first air outlet. The external air compressor 220 provides auxiliary compressed air supply when the vehicle needs an additional air source or is parked, and supplies air to the air tank 100 through the second air outlet. The dual air supply system ensures that no matter what state the vehicle is in, there is sufficient compressed air supply, which greatly improves the air supply capacity and stability of the system. The four-circuit protection valve 500 connects the first air outlet and the second air outlet in parallel with the air inlet of the air tank 100, ensuring the pressure balance of the compressed air, and can also protect each circuit when a system failure occurs, preventing the entire system from being paralyzed due to a certain circuit failure. The first air outlet and the second air outlet connected in parallel significantly improve the supply speed and efficiency of compressed air, enhance the reliability and stability of the system, reduce the impact of single point failures, and enable the on-board air compressor 210 and the external air compressor 220 to share the load according to demand, avoiding long-term overload of a single air compressor, thereby improving its service life and reliability. This embodiment significantly increases the supply of compressed air and shortens the filling time of the air tank 100 through the dual air supply design of the on-board air compressor mechanism 210 and the external air compressor mechanism 220. The parallel design of the on-board air compressor mechanism 210 and the external air compressor mechanism 220 and the application of the four-circuit protection valve 500 ensure the stable air supply of the system under high-frequency and large-volume air usage conditions, meeting the complex air usage requirements of multi-bridge engineering vehicles. The external air compressor mechanism 220 provides auxiliary on-board air compressor mechanism 210 to supply air to the air tank 100 when the vehicle is started or restarted, shortening the waiting time and improving the working efficiency of the vehicle.

[0052] In an embodiment of the present invention, the external air compression mechanism includes a hydraulic pump 221, a hydraulic motor 222 and an external air compressor 223, the external air compressor 223 has a power input end, an air input end and an air output end, wherein the hydraulic pump 221 is power-connected to the hydraulic motor 222, the output shaft of the hydraulic motor 222 is power-connected to the power input end of the external air compressor 223, the air output end of the external air compressor 223 forms a second air outlet end, the hydraulic pump 221 is electrically connected to the control module 400, and the control module 400 is used to adjust the power output power of the hydraulic pump 221 to the hydraulic motor 222 according to the output air pressure value of the second air outlet end.

[0053] Specifically, Figure 1 The dotted arrow with a thin arrow in the middle is the flow path of the hydraulic oil in a circulating oil circuit. The outlet of the hydraulic pump 221 is connected to the liquid inlet of the hydraulic motor 222, and the inlet of the hydraulic pump 221 is connected to the liquid outlet of the hydraulic motor 222. By controlling the hydraulic oil output power of the hydraulic pump 221, when the first sensing unit 310 or the second sensing unit 320 senses that the internal pressure value of the air tank 100 or the output air pressure value of the second air outlet is less than or equal to 8 bar, the control module 400 controls the hydraulic pump 221 to output hydraulic oil to the oil circuit of the hydraulic motor 222 at maximum power, so that the hydraulic motor 222 can quickly compress the air flowing into the air output end through the air input end of the external air compressor 223, so that the second air outlet end can replenish air to the air tank 100 at maximum power; when the first sensing unit 310 or the second sensing unit 320 senses that the internal pressure value of the air tank 100 or the output air pressure value of the second air outlet is greater than or equal to 8.5 bar, the control module 400 controls the hydraulic pump 221 to output hydraulic oil to the oil circuit of the hydraulic motor 222 at a preset power less than the maximum power, so as to save energy consumption.

[0054] It should be noted that the hydraulic pump 221, the hydraulic motor 222 and the external air compressor 223 are all existing technologies.

[0055] It should be understood that the output air pressure value of the second air outlet is positively correlated with the power output of the hydraulic pump 221 to the hydraulic motor 222 .

[0056] As an optional implementation of this embodiment, when the first sensing unit 310 or the second sensing unit 320 senses that the internal pressure value of the air storage tank 100 or the output air pressure value of the second air outlet is A, and A≤8bar, the control module 400 controls the hydraulic pump 221 to output hydraulic oil to the oil circuit of the hydraulic motor 222 at maximum power. When the pressure value is A, the system needs to replenish compressed air at the maximum rate, and the control module 400 controls the hydraulic pump 221 to drive the hydraulic motor 222 at maximum power, so that the air output end of the external air compressor 223, i.e., the second air outlet, quickly replenishes air to the air storage tank.

[0057] As another optional implementation manner of this embodiment, when the first sensing unit 310 or the second sensing unit 320 senses that the internal pressure value of the air tank 100 or the output air pressure value of the second air outlet is B, 8bar≤B≤8.5bar, the control module 400 controls the hydraulic pump 221 to output hydraulic oil to the oil circuit of the hydraulic motor 222 at maximum power; when the first sensing unit 310 or the second sensing unit 320 senses that the internal pressure value of the air tank 100 or the output air pressure value of the second air outlet is C, 8.5bar≤B≤10bar, the control module 400 controls the hydraulic pump 221 to output hydraulic oil to the oil circuit of the hydraulic motor 222 at a gradually decreasing power according to the real-time internal pressure value or output air pressure value. When the pressure value is B, the system needs to replenish compressed air at a higher rate. The control module 400 still enables the hydraulic pump 221 to output hydraulic oil to the oil circuit of the hydraulic motor 222 at maximum power to ensure that the air pressure rises rapidly. When the pressure value is C, the system pressure is close to the ideal value and high-speed air replenishment is not required. The control module 400 gradually reduces the hydraulic oil output power of the hydraulic pump 221 according to the real-time pressure value, thereby optimizing energy consumption.

[0058] As another optional implementation of this embodiment, when the first sensing unit 310 or the second sensing unit 320 senses that the internal pressure value of the gas storage tank 100 or the output pressure value of the second gas outlet is D, and D≤8bar, the control module 400 controls the hydraulic pump 221 to output hydraulic oil to the oil circuit of the hydraulic motor 222 from the maximum power to the gradually decreasing power according to the real-time internal pressure value or the output pressure value. When the pressure value is D, the power of the hydraulic pump 221 is adjusted according to the real-time pressure value, and the control module 400 gradually reduces the hydraulic oil output power of the hydraulic pump 221 from the maximum power to ensure stable air replenishment and save energy consumption.

[0059] As another optional implementation of this embodiment, the hydraulic pump 221 is a load-sensitive pump in the prior art. The hydraulic pump 221 collects the pressure flow signal of the hydraulic oil at the power input end of the external air compressor 223 through its own pressure sensing end, and adjusts the output in real time according to the pressure flow signal to control the second air outlet to dynamically adjust its air compression power according to the pressure flow signal, that is, when the pressure flow signal decreases, the air compression power is reduced; when the pressure flow signal increases, the air compression power is increased. When the pressure flow signal decreases, it indicates that the system demand is reduced. The load-sensitive pump will reduce the output power, reduce the air compression power, and avoid unnecessary energy consumption. When the pressure flow signal increases, it means that the system demand increases. The load-sensitive pump will increase the output power and increase the air compression power to meet the needs of the system. This embodiment can flexibly and efficiently manage the supply of compressed air under different pressure demand states by dynamically adjusting the output power, ensuring the stability and efficiency of the system under various working conditions. At the same time, it can significantly save energy consumption, optimize resource utilization, and improve overall performance and life. This design not only meets the efficient and reliable requirements of engineering vehicles for compressed air systems, but also achieves the goals of energy conservation, emission reduction and sustainable development.

[0060] In an embodiment of the present invention, the passage between the second air outlet and the air storage tank 100 is connected with a first condenser 71 and a first dryer 81. Specifically, the main function of the first condenser 71 is to reduce the temperature of the compressed air. During the compression process, the air will heat up due to compression, which not only affects the quality of the air, but also may cause overheating of system components. Through the first condenser 71, the high-temperature compressed air is cooled, and the water vapor therein will condense into liquid water, thereby reducing the moisture content in the air. The function of the first dryer 81 is to further remove moisture from the compressed air. Although the first condenser 71 can remove most of the moisture, in order to ensure the dryness of the air, further processing is required. The first dryer 81 can use adsorption or condensation technology to effectively remove residual moisture in the air and ensure that the air delivered to the air storage tank 100 is dry, thereby protecting the pneumatic equipment and improving its efficiency. This embodiment significantly reduces the moisture content in the compressed air through the dual treatment of the first condenser 71 and the first dryer 81, prevents moisture from corroding the pneumatic equipment and pipelines, and extends the service life of the equipment. The dry air helps to maintain the stable air pressure in the air storage tank 100 and the system, reduces air pressure fluctuations caused by water evaporation, reduces the accumulation of condensed water inside the pneumatic equipment, improves the operating efficiency and response speed of the equipment, and helps the system to operate stably under various environmental conditions, especially in high humidity environments.

[0061] More specifically, in an embodiment of the present invention, the air input end is connected to a second dryer 82. The main function of the second dryer 82 is to remove moisture from the air before the air is compressed. This helps to reduce the moisture generated during the compression process, thereby reducing the burden of subsequent processing steps. Through the second dryer 82, the air entering the external air compressor 223 has been pre-treated before being compressed, and most of the moisture has been removed, which can reduce the amount of water vapor generated due to the increase in temperature during the compression process. In this embodiment, through the pretreatment of the second dryer 82, the air entering the external air compressor 223 is relatively dry, which reduces the moisture generated during the compression process and helps to improve the initial quality of the compressed air. That is, since the air entering the air compressor has been dried, the subsequent processing burden of the first condenser 71 and the first dryer 81 is reduced, which helps to improve the working efficiency and life of these devices. Dry air can reduce the accumulation of condensed water inside the air compressor, improve the operating efficiency and response speed of the air compressor, reduce the loss of compressed air in pipelines and pneumatic components, thereby reducing the workload of the external air compressor 223 and saving energy. That is, by reducing the negative impact of moisture on the external air compressor 223, the maintenance frequency and cost of the system are reduced.

[0062] As an optional implementation of this embodiment, the second dryer 82 has an integrated one-way valve function, which can disconnect the external air compressor mechanism 220 when the external air compressor mechanism 220 fails or is under maintenance. The vehicle-mounted air compressor mechanism 210 can still inflate the main vehicle pipeline and will not leak through the external air compressor mechanism 220.

[0063] In an embodiment of the present invention, the external air compressor mechanism 220 further includes a switch 600, the hydraulic pump 221 is electrically connected to the switch 600, and the control module 400 is electrically connected to the switch 600. The control module 400 is used to control the opening and closing of the switch 600 according to the internal pressure value of the gas storage tank 100 and / or the output air pressure value of the second gas outlet, so as to correspondingly control the start and stop of the hydraulic pump 221. When the internal pressure value of the gas storage tank 100 drops to a certain value or the output air pressure value of the second gas outlet is lower than a preset value, the control module 400 detects and controls the hydraulic pump 221 to start through the switch 600, and the hydraulic pump 221 outputs hydraulic oil to the oil circuit of the hydraulic motor 222 at a preset power, so that the air in the external air compressor 223 is compressed by the hydraulic motor 222, and supplies air to the gas storage tank 100 through the second gas outlet, so as to quickly increase the pressure in the gas storage tank 100. On the contrary, when the internal pressure of the air tank 100 reaches or exceeds the preset value, the control module 400 controls the hydraulic pump 221 to stop working through the switch 600, thereby avoiding over-inflation of the air tank 100. In addition, when the external air compressor mechanism 220 fails or needs maintenance, the external air compressor mechanism 220 can be disconnected by simply disconnecting the power line of the switch 600 and cutting off the external air compressor mechanism 220. At the same time, it is also convenient to assemble the external air compressor mechanism 220 to a vehicle with configuration requirements.

[0064] In an embodiment of the present invention, a second condenser 72 and a third dryer 83 are connected to the passage between the first air outlet and the air storage tank 100. The second condenser 72 is arranged between the first air outlet and the air storage tank 100, and is used to cool the compressed air and condense the moisture therein. The third dryer 83 is arranged after the second condenser 72, and is used to further remove the moisture in the compressed air to ensure the dryness and purity of the air supply. This embodiment significantly improves the quality of the compressed air through the dual treatment of the second condenser 72 and the third dryer 83, removes most of the moisture and other impurities, and the high-quality compressed air reduces the corrosion and blockage risks of the pipelines and pneumatic components, thereby extending the service life of the entire system. In addition, the dry compressed air can prevent ice from forming inside the brake system in a low temperature environment, ensure the stable performance of the brake system under various working conditions, improve the response speed and braking effect of the brake system, and ensure the driving safety of the vehicle.

[0065] Please continue reading Figure 1 and Figure 2 , and refer to Figure 3 The present invention further proposes a method for controlling an air compressor system for a multi-axle engineering vehicle, using the air compressor system for a multi-axle engineering vehicle as described above, and the method for controlling an air compressor system for a multi-axle engineering vehicle includes:

[0066] Step S10, starting the air compression structure to enable the first air outlet to supply air to the air inlet of the air storage tank;

[0067] Step S20, obtaining the internal pressure value of the gas storage tank and the output pressure value of the second gas outlet through the first sensing unit and the second sensing unit respectively;

[0068] Step S30, the control module determines whether the internal pressure value of the gas storage tank and / or the output pressure value of the second gas outlet meet a preset condition;

[0069] Step S40: If not, the control module controls the air compression structure to supply air to the air storage tank through the first air outlet end and / or the second air outlet end.

[0070] For ease of understanding, a specific implementation process is shown here:

[0071] In step S10, initial air supply: start the vehicle-mounted air compression mechanism 210 in the air compression structure 200, so that the first air outlet starts to supply air to the air inlet end of the air storage tank 100. At this time, the compressed air of the vehicle-mounted air compressor is mainly used to initially increase the air pressure in the air storage tank 100.

[0072] In step S20, the pressure value is obtained: the internal pressure value of the gas storage tank 100 is obtained by using the first sensing unit 310 of the sensing module 300, and the output air pressure value of the second air outlet end of the external air compressor mechanism 220 is obtained by using the second sensing unit 320 of the sensing module 300. The above data are transmitted to the control module 400 in real time to evaluate the current system status.

[0073] In step S30, the pressure condition is determined: the control module 400 is used to determine whether the internal pressure value of the gas storage tank 100 or the output air pressure value of the second air outlet meets the preset conditions, and the preset conditions include the target pressure range of the gas storage tank 100 and the output air pressure requirement of the external air compressor 220. These preset conditions can be set according to the specific needs and safety standards of the vehicle.

[0074] In step S40, combined air supply: if the control module 400 determines that the internal pressure value of the air tank 100 or the output air pressure value of the second air outlet end does not meet the preset conditions, the control module 400 is used to control the air compression structure 200 to supply air to the air tank 100 through the first air outlet end and the second air outlet end. At this time, not only the on-board air compression mechanism 210 is working, but the external air compression mechanism 220 is also started at the same time to speed up the increase of the air pressure in the air tank 100, and continue the combined air supply until the internal pressure value of the air tank 100 and the output air pressure value of the second air outlet end both meet the preset conditions. At this time, the system will automatically adjust to restore the air supply process to normal.

[0075] In this embodiment, through the sensing module 300 and the control module 400, the system can automatically adjust the air supply state, ensure that the air tank 100 is always maintained within the set pressure range, provide stable air pressure output, ensure the normal operation of the air brake system and the auxiliary pneumatic system, and use the combined air supply mechanism to ensure that the air pressure in the air tank 100 can be quickly restored in the case of high-frequency and large-volume air use, to ensure the normal operation of the system, especially in frequent braking and complex working conditions, significantly improve the working efficiency of the vehicle, and only start the external air compression mechanism 220 when necessary, avoid unnecessary energy consumption, reduce equipment wear and maintenance costs, improve the energy utilization efficiency of the entire system, accurately control the pressure of the air tank 100, avoid brake failure or poor effect caused by insufficient air pressure, improve the safety of vehicle operation, and ensure the safety of operators and equipment. In addition, the specific structure of the air compressor system for multi-bridge engineering vehicles refers to the above embodiment. Since the air compressor system control method for multi-bridge engineering vehicles adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0076] Please continue to refer to Figures 1 to 3 , and refer to Figure 4 In an embodiment of the present invention, the step of the control module determining whether the internal pressure value of the gas storage tank and / or the output pressure value of the second gas outlet meets a preset condition comprises:

[0077] Step S21, the control module determines whether the internal pressure value of the gas storage tank and / or the output pressure value of the second gas outlet is greater than or equal to 8 bar;

[0078] Step S22: If not, the preset condition is not met.

[0079] Specifically, the control module 400 determines whether the internal pressure value of the gas tank 100 and / or the output pressure value of the second gas outlet is greater than or equal to 8 bar, so as to ensure that there is sufficient air pressure in the gas tank 100 to support the normal operation of the vehicle. If the control module 400 determines that the internal pressure value of the gas tank 100 and / or the output pressure value of the second gas outlet is less than 8 bar, it is considered that the preset condition is not met, and the control module 400 will start the external air compressor mechanism 220 to supply air to the gas tank 100 through the second gas outlet and the first gas outlet to accelerate the recovery of air pressure. If step S21 determines that the internal pressure value of the gas tank 100 is greater than or equal to 8 bar, there is no need to start the joint air supply, and the system continues to operate normally.

[0080] Please continue to refer to Figures 1 to 4 , and refer to Figure 5 In an embodiment of the present invention, after the step of controlling the air compressor structure to supply air to the air storage tank through the first air outlet and / or the second air outlet, the air compressor system control method for a multi-axle engineering vehicle further includes:

[0081] Step S50, the control module analyzes the real-time change of the internal pressure value of the gas storage tank and / or the real-time change of the output pressure value of the second gas outlet to obtain a control condition;

[0082] Step S60: the control module adjusts the power output of the second gas outlet according to the control condition until the internal pressure value of the gas storage tank and the output air pressure value of the second gas outlet both meet the preset condition.

[0083] Specifically, if the control module 400 determines that the internal pressure value of the gas storage tank 100 or the output air pressure value of the second gas outlet does not meet the preset condition, the control module 400 starts the second gas outlet in the air compression structure 200, and the second gas outlet assists the first gas outlet to supply gas to the gas inlet end of the gas storage tank 100. The control module 400 analyzes changes in the internal pressure value and the output air pressure value of the gas storage tank 100 in real time. By using the feedback data of the sensing module 300, the control module 400 can monitor the changing trend and rate of the air pressure in real time. Based on these real-time data, the control module 400 can determine the current control conditions, such as the rate of increase of the air pressure and the current air pressure difference. The control module 400 adjusts the output power of the second air outlet end of the air compression structure 200 according to the control conditions obtained by the real-time analysis. The purpose of dynamically adjusting the output power is to optimize the air supply efficiency so that the first air outlet end and the second air outlet end can work together to quickly increase the internal pressure value of the gas storage tank 100 and the output air pressure value of the second air outlet end to the preset conditions.

[0084] Through real-time monitoring and dynamic adjustment, this embodiment ensures that the system can quickly and effectively provide sufficient air pressure support under any circumstances, thereby improving the operating efficiency, stability and safety of the system, meeting the actual needs of multi-bridge engineering vehicles under complex working conditions, and realizing precise control of the air compression system of multi-bridge engineering vehicles.

[0085] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An air compressor system for a multi-axle engineering vehicle, characterized in that: include: Gas tank (100); An air compression structure (200), the air compression structure (200) comprising a first air outlet end and a second air outlet end, the first air outlet end and the second air outlet end both being connected to an air inlet end of the air storage tank (100); A sensing module (300), the sensing module (300) comprising a first sensing unit (310) and a second sensing unit (320), the first sensing unit (310) being used to sense the internal pressure value of the gas storage tank (100), and the second sensing unit (320) being used to sense the output air pressure value of the second air outlet; A control module (400), the air compression structure (200) and the sensing module (300) are both electrically connected to the control module (400), and the control module (400) is used to control the air compression structure (200) to supply air to the air storage tank (100) through the first air outlet and / or the second air outlet according to the internal pressure value of the air storage tank (100) and the output air pressure value of the second air outlet.

2. The air compressor system for a multi-axle engineering vehicle according to claim 1, characterized in that: The air compression structure (200) comprises an on-board air compression mechanism (210) and an external air compression mechanism (220), the on-board air compression mechanism (210) having the first air outlet end, the external air compression mechanism (220) having the second air outlet end, the first air outlet end and the second air outlet end being arranged in parallel, and the first air outlet end and the second air outlet end are both connected to the air inlet end of the air storage tank (100) via a four-circuit protection valve (500).

3. The air compressor system for a multi-axle engineering vehicle according to claim 2, characterized in that: The external air compression mechanism (220) comprises a hydraulic pump (221), a hydraulic motor (222) and an external air compressor (223); the external air compressor (223) has a power input end, an air input end and an air output end; the hydraulic pump (221) is power-connected to the hydraulic motor (222); the output shaft of the hydraulic motor (222) is power-connected to the power input end of the external air compressor (223); the air output end of the external air compressor (223) forms the second air outlet; the hydraulic pump (221) is electrically connected to the control module (400); the control module (400) is used to adjust the power output of the hydraulic pump (221) to the hydraulic motor (222) according to the output air pressure value of the second air outlet.

4. The air compressor system for a multi-axle engineering vehicle according to claim 1, characterized in that: A first condenser (71) and a first dryer (81) are connected on the passage between the second gas outlet and the gas storage tank (100).

5. The air compressor system for a multi-axle engineering vehicle according to claim 3, characterized in that: The air input end is connected to a second dryer (82).

6. The air compressor system for a multi-axle engineering vehicle according to claim 3, characterized in that: The external air compressor mechanism (220) further comprises a switch (600), the hydraulic pump is electrically connected to the switch (600), the control module (400) is electrically connected to the switch (600), and the control module (400) is used to control the opening and closing of the switch (600) according to the internal pressure value of the air storage tank (100) and / or the output air pressure value of the second air outlet, so as to correspondingly control the start and stop of the hydraulic pump (221).

7. The air compressor system for a multi-axle engineering vehicle according to any one of claims 1 to 6, characterized in that: A second condenser (72) and a third dryer (83) are connected on the passage between the first gas outlet and the gas storage tank (100).

8. A method for controlling an air compressor system for a multi-axle engineering vehicle, characterized in that: The air compressor system for a multi-axle engineering vehicle according to any one of claims 1 to 7 is applied, and the air compressor system control method for a multi-axle engineering vehicle comprises: Starting the air compression structure (200) so that the first air outlet end supplies air to the air inlet end of the air storage tank (100); The internal pressure value of the gas storage tank (100) and the output gas pressure value of the second gas outlet are respectively obtained through the first sensing unit (310) and the second sensing unit (320); The control module (400) determines whether the internal pressure value of the gas storage tank (100) and / or the output air pressure value of the second air outlet meet a preset condition; If not, the control module (400) controls the air compression structure (200) to supply air to the air storage tank (100) through the first air outlet end and / or the second air outlet end.

9. The air compressor system control method for a multi-axle engineering vehicle according to claim 8, characterized in that: The step of the control module (400) determining whether the internal pressure value and / or the output air pressure value meets a preset condition comprises: The control module (400) determines whether the internal pressure value of the gas storage tank (100) and / or the output gas pressure value of the second gas outlet is greater than or equal to 8 bar; If not, the preset condition is not met.

10. The air compressor system control method for a multi-axle engineering vehicle according to claim 8, characterized in that: After the step of: if not, the control module (400) controls the air compression structure (200) to supply air to the air storage tank (100) through the first air outlet end and / or the second air outlet end, the air compressor system control method for a multi-axle engineering vehicle further comprises: The control module (400) analyzes the real-time change in the internal pressure value of the gas storage tank (100) and / or the real-time change in the output pressure value of the second gas outlet to obtain a control condition; The control module (400) adjusts the power output of the second gas outlet according to the control condition until the internal pressure value of the gas storage tank (100) and the output gas pressure value of the second gas outlet both meet the preset condition.

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