5480 results about "Excavator" patented technology

The embodiment of the invention provides an excavator handle control system for remote operation, a handle control method based on a Hall sensor is adopted, non-contact rocker data sensing is achieved, the influence of contact and movement abrasion on the service life of a handle is reduced, and the excavator handle control system has the advantages of being high in sensitivity and good in performance; the handle mechanism is more flexible to operate, and the service life of the handle is prolonged; a two-hand cooperative control mode is adopted, and two three-degree-of-freedom handles are used for simulating the driving environment of a real excavator, so that a good remote control effect is achieved, and the feeling of presence of an operator in the remote operation process is improved; the operation habits of a driver are fully considered, the walking and working of the excavator are respectively controlled through combination of different degrees of freedom of the left hand handle and the right hand handle, an operating lever of the real excavator is simulated in the aspects of structure, motion degree of freedom and working range, and the man-machine interaction environment of excavator driving is restored.

The invention relates to the technical field of earthwork compaction, and discloses a pipe ditch backfilling and tamping system based on excavator modification. The system comprises an earthwork condition dynamic sensing module which captures a bucket tooth track, a hydraulic oil cylinder pressure pulse and a soil mass vibration spectrum in real time and combines a historical database to construct a model to output a theoretical compaction degree curve; a multi-source compaction difference analysis module performs three-dimensional deviation detection on the theoretical curve and the actual settlement volume data to generate a construction grid-level compaction difference tensor; the defect area association mapping module inputs the tensor into a geological topology analysis network, generates a loose defect propagation path probability cloud chart by combining soil parameters and identifies weak sections; and the tamping strategy self-adaptive configuration module automatically sets operation parameters according to the cloud picture, activates high-precision monitoring on a high-probability defect section, and applies a dynamic excitation force test on adjacent grids, so that intelligent management and control of the backfilling and compacting process are realized.

The invention relates to the technical field of excavator cab door frame welding, in particular to an excavator assembly welding robot which comprises a support table, an outer frame fixedly connected to the upper portion of the support table and a welding mechanical arm installed on the side portion of the support table. A first self-clamping assembly used for automatically centering, adjusting, clamping and limiting an excavator door frame vertical beam is arranged in the middle of the upper end face of the support, and a second self-clamping assembly used for automatically centering, adjusting and clamping an excavator door frame cross beam is arranged on the rear portion of the support. A linkage assembly used for sequentially triggering the moving assembly, the second self-clamping assembly and the first self-clamping assembly to operate so that a vertical supporting column, a cross beam, a vertical beam and an L-shaped supporting column section in an excavator door frame can be spliced together is jointly arranged between the support and the pushing assembly. Rapid and accurate splicing and undisturbed turn-over welding of the door frame component of the excavator are achieved through a linkage clamping and overall turn-over structure, the splicing size consistency and welding precision are remarkably improved, and meanwhile the welding efficiency and the process continuity are improved.

The invention belongs to the technical field of hard rock cutting and tunneling, and particularly relates to a front eccentric block excitation cutting disc rock breaking device which comprises a cutting assembly, an eccentric excitation device, a driving assembly and a supporting assembly, and the rear portion of the supporting assembly is fixedly connected with a cutting arm of a tunneling machine; the driving assembly comprises a motor, a main shaft and various connecting devices; an eccentric excitation device and a cutting assembly are mounted at the front end of the main shaft; the cutting assembly is mounted at the front end of the main shaft; the driving device ensures stable rotation of the cutterhead and enables vibration generated by the eccentric excitation device to be transmitted to the cutterhead. Vibration generated by rotation of the eccentric block is utilized to enable the cutter head to impact the rock, so that the rock is collapsed, and the rock is efficiently cut; as the cutter head cuts the rock mainly by means of vibration impact generated by the eccentric device, compared with a self-rotating mode and a traditional milling rock breaking mode and a TBM rolling mode, the efficiency of cutting the rock is improved, and the service life of the cutter is prolonged.

An upper revolving structure (4) of an electric hydraulic excavator (1) includes a revolving frame (7), an operator's seat (10), an electric motor (15), a hydraulic pump (17) driven by the electric motor (15), an oil tank (18), and an exterior cover (20) disposed in the revolving frame (7) to cover electrical equipment including the electric motor (15) and hydraulic equipment including the hydraulic pump (17) and the oil tank (18). A partitioning member (25) that is disposed in the revolving frame (7) to partition an inside of the exterior cover (20) into an electrical equipment room (28) and a hydraulic equipment room (29). An electrical equipment cooling device (31) including an electrical equipment cooling fan (34) is disposed in the electrical equipment room (28), and a hydraulic equipment cooling device (35) including a hydraulic equipment cooling fan (37) is disposed in the hydraulic equipment room (29).

The invention relates to the technical field of excavator bucket rods, and provides a bucket rod composite damping device and an excavator. The device comprises a shell composed of a base, an outer shell and a stress shell; the magneto-rheological buffer device is installed in the shell and composed of a lattice structure made of magneto-rheological elastomer materials and magneto-rheological fluid filled in gaps corresponding to the lattice structure, and a plurality of sound absorption holes are formed in each cell element wall in the lattice structure; the electromagnetic device is located in a containing cavity formed in the lattice structure and is composed of a magnetic core and an electromagnetic coil; the anti-vibration pad and the stress plate are embedded in the top of the shell and are in contact with the stress plate; the damping springs are arranged on the periphery of the shell and fixedly connected between the stress plate and the base; the vibration monitoring module is used for collecting vibration data of the bucket rod in real time and transmitting the vibration data to the intelligent control module, and the intelligent control module is used for adjusting the output magnetic field intensity of the electromagnetic coil according to the vibration data so as to adjust the viscosity of the magnetorheological fluid in real time.

The invention provides a quadrant switching smooth control method, device and equipment for an electro-hydrostatic system, and relates to the technical field of electro-hydraulic compound drive control. According to the method, sensor state information is acquired, a discretization state-space equation is established, a cost function is designed, improved sequential quadratic programming is called to solve the optimal control quantity, instructions are smoothly processed through a linear tracking differentiator, a reference value is calculated through a current distribution strategy and pressure feed-forward compensation, and cooperative impact resistance control is achieved through a PI controller and SVPWM. The response speed and stability of the electro-hydraulic compound system in the quadrant switching process can be remarkably improved, the problems of impact and torque overshoot are effectively restrained, the service life of equipment is prolonged, and the electro-hydraulic compound system is suitable for high-performance requirement scenes under complex working conditions such as electric loaders, excavators and winches.

The invention relates to the technical field of machine vision, and discloses an excavator loading counting method and device based on machine vision, a terminal and a medium, and the method comprises the steps: obtaining a current frame image collected according to a preset frame rate; inputting the current frame image into a pre-trained target detection model to obtain a detection result output by the pre-trained target detection model; when the detection result comprises a target image, extracting a loading vehicle image from the target image; inputting the loading vehicle image into a pre-trained optical character recognition model to obtain a loading vehicle number recognition result output by the pre-trained optical character recognition model; and counting the loading quantity of the excavator according to the number identification result of the loading vehicle. The automatic identification of the loading vehicle and the automatic statistics of the loading quantity of the excavator are realized, the complexity and error-prone property of manual counting are avoided, the working efficiency of a mine field is improved, and the workload of operators is reduced.

The invention discloses an excavator heat dissipation control method and system based on environment temperature and operation working conditions. The excavator heat dissipation control method comprises the steps that S1, the operation working conditions of an excavator are divided into five working conditions including the super-heavy load working condition, the heavy load working condition, the medium load working condition, the light load working condition and the super-light load working condition; s2, the external environment temperature is divided into 10 gears; s3, according to the environment temperature and the operation working condition, the heat dissipation requirement is divided into 10 gears; s4, the rotating speed of the cooling fan is adjusted according to the cooling requirement gear, so that the cooling requirement is accurately matched with the rotating speed of the cooling fan; and S5, whether the temperature of the working medium in the excavator is larger than a high-temperature threshold value or not is judged, if yes, heat dissipation is conducted according to the corresponding heat dissipation fan rotating speed obtained through the heat balance test, and if not, heat dissipation is conducted according to the actual heat dissipation requirement gear standard. The problem of heat dissipation redundancy caused by single parameter control is solved, and dynamic matching of the rotating speed of the fan and the composite heat dissipation requirement is achieved. And the energy consumption under the low-load working condition and the cold environment is reduced, and the risk of insufficient heat dissipation under the high-temperature heavy-load working condition is avoided.

The invention relates to the technical field of mining area vehicle excavation operation statistics, in particular to a mining area vehicle excavation operation statistics method, system and device and a storage medium. The statistical method comprises the steps that the relative position between the excavator and the mine car is determined through beacon signals, and the distance between the excavator and the mine car is calculated according to position data of the relative position; a high-density vibration sensor is used for detecting periodic vibration signals generated during operation of the excavator, and SD periodic burr signals are extracted through a signal processing algorithm and used for judging whether the excavator is loading or not; when it is judged that the excavator is loading, a loading event is recorded, and a loading record is generated. According to the invention, by fusing various sensor signals, the accuracy of mining area vehicle excavation operation statistics is improved. Specifically, the beacon signal enables the relative position between the excavator and the mine car to be accurately determined, so that misstatistics caused by wrong position judgment is avoided.

The invention relates to the technical field of hydraulic engineering construction equipment, in particular to a soil sampling device which comprises an excavator, a rock soil sampling device is arranged on the excavator, and the rock soil sampling device comprises a sampling rod used for sampling rock soil and a driving mechanism used for driving the sampling rod to move. The sampling rod is a hollow rod, a storage cavity for storing samples is formed in the inner wall of the sampling rod, and a plugging device is arranged between the storage cavity and the hollow cavity of the sampling rod; the plugging device comprises a plugging plate and an adjusting mechanism; the plugging plate is used for plugging and communicating the storage cavity and the hollow cavity; the adjusting mechanism is used for driving the plugging plate to adjust; and the plugging plate is rotationally matched on the sampling rod. The soil sampling device has the effects of reducing impurities entering a sample during re-sampling and improving the sampling accuracy.

The invention relates to the technical field of engineering mechanical structure optimization, in particular to an excavator structure topological optimization method and system based on real-time stress field reconstruction. The method comprises the following steps of: designing finite element analysis software, modeling and simulating in the finite element analysis software to obtain virtual data, designing a Kalman filter to carry out error correction on the virtual data and actual test data, training the Kalman filter by utilizing the corrected data to obtain prediction of real-time stress field distribution, and further, establishing a topological optimization model of an excavator structure, according to the method, material attributes are coded into a weight matrix in a neural network, and a stress constraint partial differential equation is used as a constraint condition, so that high-precision reconstruction of the stress field of the movable arm of the excavator under an actual working condition is realized, and an accurate boundary condition is provided for topological optimization.

The invention relates to the field of coal mining, in particular to an ultra-narrow multifunctional reversed loader suitable for a coal mine tunnel, and aims to solve the problem that an excavator in the prior art is inconvenient to convey a coal mine in a narrow pipeline. The crawler walking assembly is mounted at the bottom of the saddle, the mounting frame is fixed to the top of the saddle, and a conveying space is formed between the mounting frame and the top of the saddle; the excavating mechanism comprises a rotary table rotationally connected to the top of the mounting frame, an excavating arm assembly mounted on the rotary table and a driving part mounted on the top surface of the mounting frame and used for driving the rotary table to rotate; and the material conveying mechanism comprises a fixing frame mounted at the top of the saddle, a conveying belt mounted on the fixing frame and a material receiving table mounted at the head of the fixing frame. According to the excavator, excavated coal in the bucket can be conveniently conveyed to the rear portion of the excavator through the conveying belt, and coal cinder adhering to the material guide plate can be conveniently cleaned.

The power control method comprises the steps that a whole machine controller of the excavator receives a detection signal of an excavator load and judges the working condition of the excavator, the required torque is calculated according to the working condition of the excavator, and the required torque is output to a motor controller; the motor controller receives the target rotating speed and the required torque of the complete machine controller and the output rotating speed and the output torque of the engine controller, decides charging and discharging of the system and calculates an ISG motor control signal; and a feed-forward feedback control method is adopted to control the ISG motor to assist in driving the excavator load, the feed-forward control value of the ISG motor is the required torque, and the feedback control value of the ISG motor is the rotating speed error calculation value. According to the power control method of the hybrid power excavator, the time of charging and discharging in the excavation period is distributed, and the torque and the charging and discharging parameters can be set according to the characteristics of the battery and the motor, so that the whole system reaches a balance value.

The invention discloses a construction method applied to underground mine vertical shaft surrounding rock condition improvement. The construction method comprises the steps that a flat working face is cleaned, a temporary water nest is arranged for drainage, the drilling position is projected, and a down-the-hole drill is debugged; rock drilling is conducted according to the designed angle, direction and depth, propelling pressure is adjusted along with the depth, and cleaning and plugging are conducted after hole forming; grouting pipes with holes are used as pipe sheds to be driven into the holes, and are welded into a whole through annular steel bars; single-liquid-slurry and double-liquid-slurry segmented grouting is adopted, and the grouting pressure is controlled; during construction, grout diffusion and stratum deformation are monitored, after surrounding rock consolidation reaches the standard, weak blasting is matched with a small excavator for excavation, and after acceptance inspection is qualified, reinforcing steel bars are bound, formworks are installed, and concrete is poured. Compared with the prior art, the problems of collapse and water gushing of the vertical shaft under the strong weathering and water-rich geology can be solved, and the defects of insufficient supporting strength, grouting uniformity, construction efficiency and long-term stability in the traditional technology are overcome.

On a turn frame of an excavation machine, a hydraulic oil tank is placed in the center of a right engine chamber in the front-back direction, a control valve is placed in front of the hydraulic oil tank, a battery is further placed in front of the control valve, and a cool mechanism is placed behind the hydraulic oil tank. The controller, which outputs a signal to drive the control valve, is placed opposite the hydraulic oil tank.

A piston and cylinder unit of a working machine, for example a wheel loader, excavator, tipper or crane serves to steer, pivot, lift or provide other movements of the working machine or of a tool. The piston and cylinder unit includes a cylinder, a piston being arranged in the cylinder to be axially movable along a longitudinal center axis and a piston position detection unit. The cylinder includes a mounting bore extending radially in the cylinder. The piston position detection unit is arranged in the mounting bore and detects the axial position of the piston in the cylinder by high frequency technology. The piston position detection unit includes an antenna for sending and receiving high frequency signals. A collimator is arranged in the beam path of the antenna. The antenna has a main sense of direction of radiation extending parallel to the longitudinal center axis.

The present invention discloses a method and device for positioning and orienting a tunnel boring machine. The method comprises: when the tunnel boring machine is moving and excavating in a tunnel, a multi-beam laser radar installed at its rear end is used to scan a guide rod at the top of the tunnel to obtain relevant parameters of the guide rod, and according to the relevant parameters, the body offset angle and offset distance of the tunnel boring machine relative to the central axis of the tunnel are obtained, thereby controlling the tunnel boring machine walking system to adjust the walking direction and position, so that the tunnel boring machine can automatically walk along the central axis of the tunnel. During the automatic walking of the tunnel boring machine, whenever the guide rod is out of the laser radar scanning area, the guide rod is moved forward along the walking direction of the tunnel boring machine, so that the laser radar can scan the guide rod in real time, so that the tunnel boring machine can always walk automatically along the central axis. The method of the present invention calculates the offset distance and angle between the tunnel boring machine and the central axis of the tunnel through the guide rod, so as to realize that the tunnel boring machine automatically walks along the central axis in the tunnel, and the implementation method is simple and the result is accurate and reliable.

The present invention makes it possible to, in a configuration provided with electrical components such as an inverter device for controlling an electric motor, obtain a high degree of freedom with regard to the layout of the electrical components and efficiently place the electrical components in a limited space. An excavator comprises: an electric motor; a hydraulic fluid tank in which hydraulic fluid is stored; a hydraulic pump that is driven by the electric motor and supplies the hydraulic fluid within the hydraulic fluid tank to an actuator; and an inverter device that, with respect to the hydraulic fluid tank, is provided at a position away from a left-side surface part of the hydraulic fluid tank.

The utility model discloses an efficient drainage ditch excavation device based on an adjustable shaping excavator bucket, and relates to the technical field of municipal engineering and hydraulic engineering construction. Different design requirements are met by hydraulically adjusting the size of the bucket, the bucket body is formed at a time, manual finishing and template use are reduced, the construction cost is reduced by more than 20%, the excavation precision is controlled by combining GPS positioning and real-time measurement, the groove longitudinal slope and elevation precision is ensured, and the construction efficiency is improved. One-time forming of the drainage ditch and synchronous outward transportation of spoil are achieved, and site accumulation is avoided. According to the scheme, the construction efficiency and quality are remarkably improved, and the method is suitable for municipal drainage engineering under soil texture and strong weathered rock geological conditions.

Systems, methods, and computer program products can determine wear, damage, change, or other characteristics of a portion of a front linkage of an excavator. The systems, methods, and computer program products can comprise determining, based on signals from at least one sensor of the excavator, that the excavator is in a predetermined state to weigh at least a portion of the front linkage of the excavator; determining a weight of the portion of the front linkage of the excavator under a condition that the excavator is in the state to weigh the portion of the front linkage of the excavator; determining that the determined weight of the portion of the front linkage is outside of a predetermined weight range; and electronically outputting information regarding a further action to be taken with respect to the portion of the front linkage of the excavator.

The utility model discloses an in-plant trial assembly assistive device for a door-shaped rotary bearing beam of a bucket-wheel excavator. The in-plant trial assembly assistive device comprises a pitching reaming coaxial tool and a rotary center coaxial tool. The pitching reaming coaxial tool comprises a transverse center shaft, a side clamping flange and a side baffle, a first middle stand column and a second middle stand column are fixed to the two ends of the transverse center shaft through the side clamping flange and the side baffle, and it is guaranteed that the pitching reaming coaxiality of the material taking arm meets the drawing requirement; the rotation center coaxial tool comprises a vertical center shaft, a top clamping flange, a top baffle and a supporting base, the top of the rotation center coaxial tool fixes a top cross beam to the vertical center shaft through the top clamping flange and the top baffle, and the bottom of the rotation center coaxial tool fixes the vertical center shaft and a bearing beam rotation base together through the supporting base. And the coaxiality of the rotating shaft of the discharging arm to the rotation center meets the drawing requirements. According to the utility model, the product assembly precision can efficiently meet the drawing requirement, each part can be supported and connected, the overall stability of the product is improved, and the safety risk in the production process is reduced.

The invention provides an automatic digging method of an excavator based on image recognition, which is realized based on a material pool and the excavator, a laser radar and a binocular camera are arranged on the upper edge of the material pool, and the excavator comprises a digging arm, a double-bucket assembly and a control unit. The method comprises the following steps: determining a peak initial position by a laser radar material pile three-dimensional point cloud, and performing secondary calibration by a camera to obtain a peak final position and a slope angle; the control unit switches a first / second digging mode according to the distance between the wave crest and the excavator, the first mode controls the excavator bucket to conduct wall-attached digging and conduct bottoming detection through the pressure sensor, and the second mode adjusts the angle of the excavator bucket to conduct digging according to the slope angle; when no wave crest exists, a corresponding digging scheme exists, and the point cloud is updated after digging each time; the wave crest positioning precision and the environmental adaptability are improved, the digging efficiency is optimized, manual intervention is reduced, and the device is suitable for digging of materials such as cereals and gravels.

A control device of an electric hydraulic excavator sets or computes a rotation speed command and an allowable torque of an electric motor on the basis of a required rotation speed of the electric motor, and a sum of a suppliable electric power of a converter and a battery suppliable electric power. An inverter of the electric hydraulic excavator sets the allowable torque to a torque command if a calculated torque of the electric motor computed by multiplying by a gain, a difference between the rotation speed command and a rotation speed of the electric motor, exceeds the allowable torque, and sets the calculated torque to the torque command if the calculated torque does not exceed the allowable torque. The inverter supplies the electric power that can generate a torque corresponding to the torque command to the electric motor.

The utility model relates to the technical field of electric excavators, and discloses an electric excavator cabin arrangement structure and an electric excavator, and the electric excavator cabin arrangement structure comprises a mounting platform. The installation platform is divided into a first installation area and a second installation area which are adjacent in the length direction of the installation platform, the first installation area and the second installation area extend in the width direction of the installation platform, and the second installation area is divided into an upper layer and a lower layer which are arranged up and down; a hydraulic main valve, a rotary motor and a controller are installed in the first installation area in the width direction of the installation platform, and a storage battery is installed on the side, away from the second installation area, of the first installation area. In the width direction of the mounting platform, a hydraulic main pump, a motor and a heat dissipation mechanism are mounted on the lower layer of the second mounting area, and a hydraulic oil tank and a battery pack are mounted on the upper layer of the second mounting area. The arrangement space of the cabin is optimized, the structure is compact, and the space utilization rate is improved.

The embodiment of the invention provides a system and a method for identifying the working state of a mining excavator, and the method comprises the steps: collecting a vibration signal and a hydraulic signal of the mining excavator in real time through a sensor assembly; performing feature extraction on the vibration signal and the hydraulic signal by adopting a neural network model based on deep learning so as to excavate time sequence dynamic characteristics of the mining excavator in a working state, and further performing inter-feature fine-grained response interaction on the vibration frequency domain feature and the hydraulic time sequence feature to more comprehensively reflect the operation state of the mining excavator, obtaining the multi-mode joint representation of the working state of the mining excavator, and determining whether the working state of the mining excavator is abnormal or not based on the multi-mode joint representation of the working state of the mining excavator. By means of the mode, accurate recognition and anomaly detection of the working state of the mining excavator can be achieved, and reliable guarantee is provided for mine production safety and excavator operation efficiency.

The invention relates to the technical field of engineering machinery manufacturing, in particular to an excavator part machining treatment device which comprises a fixing base, a support is fixedly connected to the fixing base, a driving mechanical arm capable of driving horizontal two-dimensional motion is installed at the top of the inner side of the support, and a sliding disc is fixedly connected to the lower end of the driving mechanical arm. The bottom face of the sliding disc is fixedly connected with a driving cylinder, and the lower end of the driving cylinder is fixedly connected with an inverted-U-shaped frame. According to the excavator part machining treatment device, three core procedures of drilling, inner wall grinding and end face grinding are integrated, through cooperative control of the driving mechanical arm, the driving air cylinder and the motor, full-process part machining can be completed without equipment replacement or repeated clamping, the part transferring and positioning time is effectively shortened, and the machining efficiency is improved. The problem that traditional step-by-step machining is low in efficiency is solved, and the machining efficiency is improved.

An excavator includes: a lower travel body; an upper slewing body mounted on the lower travel body in a slewable manner; an attachment attached to the upper slewing body; a control device configured to perform control related to activity of the excavator; a first input apparatus configured to receive an input from a user; and a display apparatus configured to display a screen operable in response to an input from the first input apparatus. The control device has a plurality of control modes for the control related to the activity of the excavator, and the display apparatus is configured to display one predetermined screen on which the user can discretionarily select one control mode from the plurality of control modes by performing an operation through use of the first input apparatus.

The invention discloses a hydraulic system applied to an accessory and swing arm deflection of an excavator and the excavator. The hydraulic system comprises a controller, a proportional valve, a main control valve, a reversing valve, a main pump, a swing arm deflection oil cylinder and accessories. The controller is connected with a right input part and a left input part; the proportional valve is electrically connected with the controller, and the proportional valve is electrically connected with the main control valve; the main pump is communicated with the main control valve through an oil way, the main control valve is communicated with the reversing valve through an oil way, and the movable arm deflection oil cylinder and the accessory are both communicated with the reversing valve through an oil way. The controller controls the opening degree of the proportional valve, and the proportional valve controls the opening degree of the main control valve. According to the auxiliary small and movable arm deflection hydraulic system applied to the excavator, the controller and the proportional valve are additionally arranged, the main control valve is controlled through the proportional valve, and the controllability of two actions meeting the customer requirements is achieved in the same valve element state. In addition, the maximum flow of rotation of the accessory can be set through the controller, the maximum rotation speed of rotation of the accessory is adjustable, and different rotation speed requirements of customers are met.

The invention discloses a control method of a hybrid power system, the hybrid power system and a hybrid excavator. The control method of the hybrid power system comprises the steps that the required power of a hydraulic system, the required power of an electrically-driven rotation system and the current electric quantity of an energy storage module are obtained; the total demand power of the system is calculated according to the demand power of the hydraulic system and the demand power of the electric drive rotation system; determining the working mode of the hybrid power system according to the size relation between the total demand power and a first preset value and the size relation between the current electric quantity of the energy storage module and an electric quantity limit value; when the hybrid power system is in the heavy load mode, the generator motor is controlled to provide power for the hydraulic system; and when the hybrid power system is in the light load mode, the generator motor is controlled to convert part of kinetic energy generated by the engine into electric energy to charge the energy storage module. The system reliability can be enhanced, energy consumption and emission are reduced, and efficient utilization of energy is achieved.