153 results about "Thermal displacement" patented technology

The invention provides a rotary table bearing-torque motor thermal vibration coupling modeling method, and relates to the technical field of machine tool reliability analysis. Comprising the steps of calculating bearing restoring force, torque and elastic rigidity; giving a dynamic balance equation of the main shaft system; unbalanced magnetic pulling force and unbalanced mass excitation are calculated; a displacement field is solved, and load changes caused by the displacement field are transmitted to the thermal model; the contact force borne by the bearing is updated by considering the load effect related to displacement, and the friction heat generation of the bearing and the heat generation of each part of the motor are calculated; calculating thermal deformation and thermal displacement of the bearing; thermal resistance among nodes is calculated, and a temperature field equilibrium equation is given through a thermal resistance network to achieve rapid thermal-mechanical coupling analysis; the thermal equilibrium equation is solved to calculate temperature response; importing the latest temperature into the kinetic model; lubricating grease viscosity and bearing thermal deformation are updated; and repeating the steps to finally obtain the main shaft displacement field and temperature field response. The method is high in accuracy, high in universality, low in test cost and high in test efficiency.

The invention relates to a horizontal integrated hairpin type feed water heater for a power plant. The horizontal integrated hairpin type feed water heater comprises a left pipe box, a right pipe box, two pipe plates, a group of feed water inlet and outlet pipes, a U-shaped pipe bundle, two straight-section shells, a hairpin bend connected with the two straight-section shells, a steam inlet, a drain outlet and other parts. The device is particularly suitable for heaters with small pipe side feed water flow and higher temperature rise; the high-temperature feed water and the low-temperature feed water are distributed in the two relatively independent tube boxes, so that the temperature difference stress of a tube plate and a tube box sealing head is avoided; the overheating section, the condensation section and the subcooling section are integrated in one device, so that the occupied area of the device and the number of connecting pipelines can be reduced; deformation stress caused by thermal displacement difference of two sections of barrel bodies of the equipment can be greatly reduced through four-support configuration; the overall height of the equipment can be reduced through horizontal arrangement, and overhaul and maintenance are facilitated.

According to the present invention, a thermal displacement correction device for an industrial machine comprises a model storage unit that stores a model of an industrial machine, a temperature data acquisition unit that acquires temperature data for the industrial machine, a thermal displacement amount calculation unit that calculates a thermal displacement amount for the industrial machine when a mobile unit of the industrial machine has moved to each of a plurality of predetermined calculation points on the basis of the model and the temperature data, a thermal displacement amount map calculation unit that calculates thermal displacement amount data for the industrial machine when the mobile unit has moved to an interpolation point that is different from the plurality of calculation points on the basis of the thermal displacement amount at each of the plurality of calculation points, and a correction value calculation unit that calculates a correction value for a command position for the mobile unit on the basis of the thermal displacement amount data.

The utility model discloses a support device for pump, including first support plate, second support plate and vertical support piece, vertical support piece includes at least three support pillar, first support plate is located above second support plate, the inside of support pillar is provided with first solidification chamber, the inside of support pillar is provided with second solidification chamber. A second curing cavity is formed between the second supporting plate and a building carrier used for bearing the supporting device for the pump, and the first curing cavity communicates with the second curing cavity and is used for containing the cementing agent. According to the supporting device for the pump, the hollow structure is arranged inside, the cementing agent is injected into the first curing cavity of the supporting column, the supporting column and the space between the second supporting plate and the building carrier are filled with the cementing agent, and after the cementing agent is cured, the supporting device for the pump and the building carrier form a whole, so that the strength and rigidity are improved; and larger thermal displacement and thermal load can be borne, the supporting stability is improved, and safe and stable support is provided for pump operation.

The invention discloses a thermoelastic topological optimization method for a thermal structure under a thermal stress singular problem, and belongs to the technical field of thermoelastic topological optimization of thermal structures. The method comprises the following steps: firstly, performing finite element modeling and topological optimization on a thermal structure to realize a clear configuration; thirdly, establishing a thermoelastic topological optimization model, and connecting nodes on the original fixed boundary by using a super spring unit to provide weak rigidity constraint; a mechanical displacement component and a thermal displacement component are obtained by superposing the mechanical load equation and the thermal load equation respectively, and a final thermal deformation response is obtained; performing sensitivity analysis according to the thermal deformation response; finally, on the basis of the sensitivity information and a gradient optimization algorithm, carrying out updating iteration on the design variables, and setting a maximum iteration step and a convergence criterion; and deleting the units lower than the threshold after optimization, and retaining the units higher than the threshold to obtain the innovative topological structure after thermal structure optimization. According to the method, the hinge phenomenon, the gray scale problem and the material-free effect of design using fixed boundary conditions can be avoided, and the method is beneficial supplement to an existing thermoelastic topological optimization method.

The invention relates to the technical field of industrial control, in particular to an error compensation method for numerical control machining of an automobile stamping die, which comprises the following steps of: acquiring temperature of a plurality of thermo-sensitive points of a numerical control machine tool and thermal displacement data of a tool nose; the effective thermal driving potential is calculated by considering the time lag effect of the temperature level and the historical temperature change; calculating a thermal phase direction gradient in combination with the temperature difference value and the nonlinear gain; combining the effective thermal driving potential and the thermal phase direction gradient into a feature vector to train a support vector regression model; and inputting the feature vector in real time to obtain a compensation value, and superposing the compensation value to the coordinate instruction by dynamic origin offset. The method can accurately reflect the thermal inertia, capture the dynamic evolution of the thermal state, comprehensively represent the thermal state to improve the adaptability of the model, and correct the thermal error in real time, thereby improving the machining precision and surface quality of the automobile stamping die.

The invention relates to the technical field of fusion reactors, and particularly discloses a fusion reactor engineering pipeline positioning compensation device. The device comprises a rack, a positioning mechanism and a first guide rail. An assembly space is defined by the machine frame and used for containing a pipeline. The positioning mechanism comprises a driving part and an abutting part, the driving part is installed on the rack and can drive the abutting part to apply radial pressure to the pipeline, and accurate positioning of the pipeline is achieved; the first guide rail is installed on the engineering support and extends in the axial direction of the pipeline, and the rack is in sliding fit with the first guide rail, so that the whole device can move in the axial direction of the pipeline. By means of the structure, accurate positioning of the pipeline in the radial direction and thermal displacement compensation of the pipeline in the axial direction can be achieved at the same time, the problems of stress and displacement caused by thermal expansion and cold contraction and vibration of the pipeline in a fusion reactor are effectively solved, and the device has the advantages of being high in positioning accuracy, good in compensation capacity and high in reliability.

An intelligent warm-up method of machine tool, applicable to a machine tool, includes: a step of, based on temperature change data and thermal displacement data of a spindle measured at different time points, establishing a thermal compensation model; a step of, while the machine tool performs a warm-up process, inputting temperature change values measured at least one component of the machine tool at intervals to the thermal compensation model to obtain corresponding thermal-displacement estimated values of the spindle at different time points and changes of thermal displacement values at individual time points; and, a step of, based on the changes of the thermal displacement values at the individual time points, deriving corresponding warm-up completion degrees.

The utility model belongs to the technical field of installation supports, and particularly relates to an electromechanical engineering installation positioning support which comprises a hanging rod connected to the bottom of a wall top and used for hanging a pipeline below the wall top and a lock sleeve fixedly installed at the bottom end of the hanging rod and used for fixedly connecting the pipeline with the hanging rod. A sliding assembly is connected between the wall top and the top end of the hanging rod, and when the pipeline generates thermal displacement, the top end of the hanging rod is driven by the lock sleeve to generate adaptive displacement along the wall top through the sliding assembly, so that the hanging rod and the pipeline are always kept in a vertical state, and the stress load of the hanging rod is reduced. And when the pipeline has thermal displacement or is in a normal state, the suspender and the pipeline are kept in a vertical state, so that the stress load of the suspender can be further reduced, and the problem that the pipeline is easy to lose stability in the mounting and using processes is solved.

A control device (3) comprises: a first deformation estimation unit (21) that calculates a first deformation, which is the deformation of at least one drive subsystem out of a feed drive subsystem and a spindle drive subsystem (11) due to heat generated in the drive subsystem, by inputting at least one of operation information representing a state quantity of the drive subsystem and temperature information indicating the temperature of the drive subsystem into a first deformation estimation model; a thermal displacement calculation unit (23) that uses kinematic configuration information about a machine tool (2) to convert the first deformation to a thermal displacement, which is the relative displacement between a tool and a workpiece; and a correction command generation unit (25) that generates a correction command to correct the position commanded to the feed drive subsystem on the basis of the thermal displacement.

The invention belongs to the technical field of numerical control machine tools, and relates to a thermal error compensation method and system for a large bridge type gantry machining center, and the system comprises a comprehensive data collection module, a key point determination module, a thermal error modeling module, a compensation execution module and a compensation optimization module. The comprehensive data acquisition module is used for synchronously acquiring three-way thermal displacement change data of a tool nose point and key point temperature data; the key point determination module is used for screening a representative key point temperature set required by modeling according to correlation and a classification principle; the thermal error modeling module is used for establishing a temperature difference-based multiple linear regression compensation model by taking a reference temperature as a reference; the compensation execution module is used for converting the compensation model into a real-time PLC program, and calculating and outputting a compensation amount to a servo system; and the compensation optimization module iteratively adjusts the compensation correction coefficient K through a dichotomy method, and verifies and optimizes the compensation effect. The problems that an existing thermal error compensation method is single in compensation object, difficult to debug and difficult to apply in an engineering mode can be effectively solved.

The utility model discloses a heat distribution pipeline installation through-wall joint capable of absorbing axial thermal displacement. The heat distribution pipeline installation through-wall joint solves the problem that a traditional heat distribution pipeline through-wall joint cannot absorb the axial thermal displacement. The node comprises a through-wall steel pipe, a heat distribution pipeline, an elastic supporting frame, an expansion water stop strip, a flange piece and a polyurethane foaming filling body, the through-wall steel pipe is pre-buried in a wall body, the heat distribution pipeline penetrates through the through-wall steel pipe, and the expansion water stop strip, the elastic supporting frame and the expansion water stop strip are sequentially arranged in an annular space between the through-wall steel pipe and the heat distribution pipeline. The expansion water stop strip, the elastic supporting frame and the expansion water stop strip are fixed through the flange piece, and a polyurethane foaming filling body is arranged in an annular space where the elastic supporting frame is located. The heat distribution pipeline has the axial displacement performance, certain waterproof performance is achieved while the displacement performance is guaranteed, the node has the waterproof performance and the axial displacement capacity, and the heat distribution pipeline through-wall node can absorb axial heat displacement.

The invention discloses a numerical control machine tool workbench thermal displacement correction method and structure, a reading head assembly is fixed on a machine tool body, a measuring scale assembly is fixed on a workbench, the reading head assembly and the measuring scale assembly are located on the same straight line, the axis of a main shaft and the reading head assembly are located in the same plane, and the plane is perpendicular to the moving direction of the workbench. The screw rod generates heat to generate thermal displacement, the coordinates of the workbench integrally deviate, and the measuring scale assembly automatically aligns the originally set coordinates after detecting the deviation of the coordinates, so that the thermal displacement generated by the screw rod is corrected; when the working table deforms, the measuring scale assembly deforms together, the coordinate position of the working table is corrected through the measuring scale assembly, the position of the reading head assembly relative to the machine tool spindle in the moving direction of the working table is accurate, at the moment, the relative size between machining features of parts on the working table is accurate, and therefore the effect of correcting the thermal displacement of the working table is achieved. Thermal displacement correction is conducted on the numerical control machine tool workbench in real time, and the positioning accuracy of the workbench is guaranteed.

The utility model relates to the technical field of electric heating energy storage, and discloses an electric heating energy storage system which comprises a heat preservation shell, a plurality of heat storage modules, a heat exchanger, an air inlet pipeline, an air outlet pipeline, an electric heating element and a fan. When the electric heating energy storage system operates, the heat release quantity of the heat storage module can be separately controlled according to the fluctuation of the heat load of a user; when one or some heat storage modules break down, other normal heat storage modules can work normally to supply heat; and meanwhile, the heat exchange temperature difference at the inlet of each heat storage chamber can be effectively reduced, and the temperature difference at the outlet of the heat exchange chamber is reduced, so that the problems of thermal stress and large thermal displacement caused by large temperature difference at the inlet and the outlet are solved. The flow of heat exchange air is adjusted by adjusting the number of the heat storage modules for releasing heat and adjusting the opening degree of the air inlet valve or the working frequency of the draught fan, so that two-stage adjustment of the heat supply amount is achieved, and the adjustment range of the heat supply amount can be effectively widened.

The invention relates to the technical field of conical sealing rotary valve production, in particular to a pretightening force compensation control device for a conical sealing rotary valve. The device comprises a pre-tightening body, a cylinder, a piston, a ball, a displacement sensor, a pressure sensor and a controller for control, the cylinder, the piston, the ball, the displacement sensor, the pressure sensor and the controller are arranged in the pre-tightening body, in the device, after the conical surface of the rotor is abraded or thermally displaced, the ball descends, and the piston also descends under the action of a wave spring and air pressure; the displacement sensor detects the displacement of the piston in real time, the pressure sensor detects the air pressure in the air cylinder in real time and transmits signals to the controller, the controller immediately calculates the needed air pressure and controls the proportional valve pressure regulator to complete pressure regulation and recover the conical surface sealing force, manual intervention is not needed, and closed-loop control ensures that the sealing force is constant.

The application provides a thermal compensation device and method of a machine tool electric spindle and a numerical control machine tool, and the thermal compensation device comprises a displacement detection device and a control device, a detection part of the displacement detection device is arranged on a tool holder connected with the spindle, the detection part of the displacement detection device and a detection surface of the tool holder are arranged in a vertical direction, and the detection part of the displacement detection device is arranged opposite and parallel to the detection surface of the tool holder; the displacement detection device detects thermal displacement of the spindle in the vertical direction by detecting distance change between the detection part of the displacement detection device and the detection surface of the tool holder; the control device is connected with the displacement detection device, the control device is used for acquiring data detected by the displacement detection device, and the position of the spindle in the vertical direction is adaptively adjusted according to the data detected by the displacement detection device. The thermal compensation device of the machine tool electric spindle can effectively solve the technical problems of the thermal compensation device of the machine tool electric spindle in the prior art, such as complex structure and poor anti-interference ability.

The present invention relates to the technical field of supports and hangers, and specifically to a spring support and hanger for thermal displacement of pipelines. The support and hanger comprises a mounting seat, a support rod is slidably connected to the mounting seat, a longitudinal elastic mechanism is connected between the support rod and the mounting seat, a circumferential elastic mechanism is connected to the end of the support rod away from the mounting seat, a support seat is fixedly connected to the circumferential elastic mechanism, a transverse elastic mechanism is fixedly connected to the support seat, two symmetrically arranged connecting pipes are sealed and slidably connected to the transverse elastic mechanism, and the connecting pipe is detachably and sealedly connected to the pipeline. The present application connects the connecting pipe to the pipeline in a detachable and sealed manner by stringing the transverse elastic mechanism between the pipelines, so that the pipeline can drive the connecting pipe to slide on the transverse elastic mechanism when thermal displacement occurs, thereby compensating for the thermal displacement generated by the pipeline, and the longitudinal elastic mechanism can buffer the vibration generated by the pipeline, which not only effectively solves the problem of thermal displacement of the pipeline, but also improves the safety and reliability of the pipeline system, ensures the safe operation of the pipeline system, and is conducive to extending the service life of the pipeline.

The invention relates to the technical field of aluminum single plate rolling mills, and discloses a rolling mill and method for manufacturing aluminum single plates, the rolling mill comprises a base and a roller machine frame, the left side of the top of the base and the bottom of the roller machine frame are fixedly installed, and a self-adaptive roller bending force compensation mechanism is arranged on the roller machine frame. According to the rolling mill and method for manufacturing the aluminum veneer, the temperature change of the bearing seat is sensed through the bimetallic strip, and a thermal displacement signal is amplified through a structure composed of the first rack, the first gear, the second rack, the third rack and the second gear; and finally, the output pressure of the first oil pressure pushing hydraulic cylinder and the second oil pressure pushing hydraulic cylinder is accurately adjusted by controlling the opening degree of a valve rod of the pilot-operated type hydraulic valve, so that self-adaptive control over the roll bending force of the supporting roll is achieved, the plate shape defect caused by thermal expansion of the working roll can be automatically compensated, the plate shape quality and flatness of the aluminum veneer are remarkably improved, and the service life of the aluminum veneer is prolonged. The problem of middle waves is effectively solved, meanwhile, the synchronism of roll bending force on the two sides is guaranteed through the hydraulic synchronous controller, and the rolling precision is further guaranteed.

The invention relates to the technical field of fused salt heat storage, in particular to a pipeline connecting device for absorbing thermal displacement of a fused salt storage tank. The device comprises a flexible connection assembly; the flexible connection assembly vertically extends, the top of the flexible connection assembly is detachably connected to the salt inlet pipe or the fused salt pump shaft and arranged on the periphery of the salt inlet pipe or the fused salt pump shaft in a sleeving mode, and the bottom of the flexible connection assembly is detachably installed on the top of the fused salt storage tank. The flexible connection assembly absorbs thermal displacement generated by the fused salt storage tank and the salt inlet pipe or the fused salt pump shaft; the flexible connection assembly can surround the periphery of the salt inlet pipe or the molten salt pump shaft to form a circumferential closed structure. And the flexible connection assembly can be circumferentially unfolded and separated from the salt inlet pipe or the molten salt pump shaft. The top and the bottom of the flexible connection assembly are detachably connected with the salt inlet pipe or the fused salt pump shaft and the fused salt storage tank, so that the flexible connection assembly can be circumferentially unfolded and separated from the salt inlet pipe or the fused salt pump shaft in the disassembly state, and replacement can be completed without cutting off the salt inlet pipe or drawing out the fused salt pump shaft.

An intelligent warm-up method of machine tool, applicable to a machine tool, includes: a step of, based on temperature change data and thermal displacement data of a spindle measured at different time points, establishing a thermal compensation model; a step of, while the machine tool performs a warm-up process, inputting temperature change values measured at least one component of the machine tool at intervals to the thermal compensation model to obtain corresponding thermal-displacement estimated values of the spindle at different time points and changes of thermal displacement values at individual time points; and, a step of, based on the changes of the thermal displacement values at the individual time points, deriving corresponding warm-up completion degrees.

This invention provides an optimization method for thermal deformation compensation of alloy plates based on digital twins, relating to the field of data processing technology. The method includes: collecting multi-source heterogeneous data of the alloy plate to be processed; performing finite element simulations on multiple processing conditions to obtain a residual stress field sample set; performing dimensionality reduction processing on the residual stress field sample set to determine a low-dimensional parameterized expression model; constructing a thermo-mechanical coupling deformation model of the alloy plate by combining the low-dimensional parameterized expression model and processing environment temperature data; mapping the residual stress field to the deformation of the alloy plate structure in the processing coordinate system through the thermo-mechanical coupling deformation model of the alloy plate; constructing a rapid prediction model of the machine tool temperature field; calculating the thermal displacement error of the machine tool structure through the rapid prediction model of the machine tool temperature field; fusing the deformation of the alloy plate structure and the thermal displacement error to obtain a comprehensive deformation error; and calculating the control variables in the processing process based on the comprehensive deformation error to obtain the optimal compensation parameters.

The invention relates to a compact first-class lithium bromide absorption heat pump unit for preparing a high-temperature heat source. The compact first-class lithium bromide absorption heat pump unit comprises a generator A, a condenser A, a generator B, a condenser B, an evaporator A, an absorber A, an evaporator B, an absorber B, a heat exchanger A, a heat exchanger B, a solution pump A, a refrigerant pump A, a solution pump B, a refrigerant pump B, an internal circulation water pump and an internal circulation medium-temperature hot water system. Two barrels are adopted to form four cavities, the structure is compact, the evaporator A and the absorber A transfer recycled low-temperature waste heat source heat to internal circulation medium-temperature hot water, the internal circulation medium-temperature hot water enables the evaporation temperature of the evaporator B to be increased and the absorption pressure to be increased, and the absorber B produces a high-temperature heat source; as a single machine is miniaturized, the length, width and height of the unit are small, the loading capacity of the generator and the condenser is improved, the thermal displacement is very small, the high-temperature and high-pressure design conditions can be met without increasing the material cost, the generating pressure and the condensing temperature are increased, and a high-temperature heat source can be produced. The unit improves the comprehensive utilization rate of energy, can produce a high-temperature heat source, expands the application field, and is suitable for occasions with miniaturized single machines.

The invention relates to the field of mechanical and electrical installation, and particularly discloses an intelligent online monitoring system and method for mechanical and electrical installation. Firstly, a pipeline image collected by a camera, supporting force data, collected by a pressure sensor, of a spring support and hanger on a pipeline at multiple preset time points and environment temperature values, collected by a temperature sensor, of the pipeline at the multiple preset time points are obtained, then feature extraction and correlation analysis are conducted on the three parts through the deep learning technology, and then the pipeline image, the supporting force data and the environment temperature values are obtained. And finally, whether thermal displacement of the pipeline occurs is judged through a classifier, so that real-time monitoring of the running state of the pipeline is achieved, the system can quickly respond to any potential abnormal condition or problem, the monitoring efficiency and accuracy of the pipeline system are improved, and safe running and long-term stability of the pipeline are guaranteed.

The invention discloses a thermal displacement compensation device of an electric spindle, a numerical control machine tool and a compensation method of the numerical control machine tool. The device comprises an eddy current displacement sensor and a compensation system. The eddy current displacement sensor comprises a probe and a post-stage processing circuit, the probe is provided with a first coil, a second coil and a multi-channel chip, the first coil is connected with a first inductance input channel of the multi-channel chip to output a first digital signal, and the second coil is connected with a second inductance input channel to output a second digital signal; the post-stage processing circuit converts the first digital signal into a first voltage signal and a pulse signal, and converts the second digital signal into a second voltage signal; and the compensation system performs temperature drift compensation on the first voltage signal according to the second voltage signal, and performs axial compensation on the motorized spindle by using the pulse signal and the compensated first voltage signal. According to the scheme, the accuracy of displacement measurement of the motorized spindle is improved, and the thermal displacement compensation effect of the spindle is guaranteed.

The utility model relates to a sliding heat preservation supporting device of a large-diameter collecting tube, which comprises a heat insulation component, a supporting component and two guide rail plates, and the two guide rail plates are horizontally, oppositely and fixedly arranged; the supporting assembly is installed on the two guide rail plates and connected with the two guide rail plates in a horizontal sliding mode. The heat insulation assembly is fixedly installed on the supporting assembly. The utility model has the beneficial effects that the structure is simple, the bearing capacity is strong, the construction is convenient, the production and construction period is shortened, the economic benefit is greatly improved, and the problem of thermal displacement generated by the stress of the high-temperature collecting tube with a larger diameter is solved.

The present invention provides a detection device that can reduce the impact of thermal displacement on the detection target while suppressing the occurrence of problems. [Solution] The detection device is applied to a mechanical device. The mechanical device comprises a rotating body and a hub bearing. The hub bearing has a first bearing portion fixed to a base portion, a second bearing portion to which the rotating body is fixed, and rolling elements, and rotatably supports the second bearing portion with respect to the base portion. The detection device comprises an annular target member 80 fixed to the second bearing portion and extending in the circumferential direction of the second bearing portion with respect to the rotation center of the second bearing portion, and a signal output provided at a position facing the detection target portion in the axial direction. A portion of the target member 80 in the circumferential direction is a thermal displacement portion Rb. The thermal displacement portion Rb is a portion of the target member 80 in which the amount of thermal displacement in the axial direction due to temperature changes of the target member 80 is larger than that of the fixed portion Ra other than the thermal displacement portion Rb.

The utility model discloses a viscous damper simultaneously satisfying bearing and large displacement, which comprises an upper connecting plate connected with a pipe clamp accessory and a lower connecting plate arranged opposite to the upper connecting plate, the lower part of the upper connecting plate is fixedly connected with an upper shell, the upper part of the lower connecting plate is fixedly connected with a lower shell, a sealing sleeve is connected between the upper shell and the lower shell, and the sealing sleeve is fixedly connected with the lower shell. Damping liquid is arranged in an inner cavity of the lower shell, a plunger extending into the damping liquid is fixedly arranged on the lower portion of the upper connecting plate, at least two lower lug handles which are oppositely arranged are arranged at the lower end of the plunger, and the lower lug handles are fixedly connected with tension springs which are obliquely arranged. According to the viscous damper, the requirement for large thermal displacement of a pipeline can be met while vibration reduction of the pipeline is achieved, the tension spring can have the stretching buffering effect on the plunger, the supporting effect and the vibration reduction effect are achieved, and the viscous damper can meet the requirement for large displacement when the pipeline vibrates while bearing the load of the pipeline; and the multifunctionality of the viscous damper is improved.

The invention discloses a multi-wire cutting machine cutting chamber and a thermal displacement control mode, and relates to the technical field of multi-wire cutting machines, the multi-wire cutting machine cutting chamber comprises a structural part frame, and the structural part frame comprises a base, a main shaft mounting seat, a fixing seat, a left stand column and a right stand column; the main shaft mounting seat and the fixed seat are connected through the left and right stand columns to form an integral closed frame; a double-shaft tilt angle sensor is arranged on the workpiece clamp; and the temperature control assembly comprises a control device, a plurality of temperature sensors, and a temperature control medium source, a temperature adjusting unit, a distribution valve group, a plurality of temperature control channels and a liquid return pipeline which are sequentially connected to form a circulation loop. The main shaft mounting base and the fixing base are connected through the left stand column and the right stand column to form an overall closed frame, the rigidity of the frame is enhanced, the frame is provided with a plurality of independent temperature control channels, and dynamic keeping of cutting precision is achieved through real-time feedback of the double-shaft tilt angle sensor and active adjustment of the temperature control assembly.

The invention relates to a first-class lithium bromide absorption heat pump unit for preparing a high-temperature heat source. Comprising a generator A, a condenser A, a generator B, a condenser B, an evaporator A, an absorber A, an evaporator B, an absorber B, a heat exchanger A, a heat exchanger B, a solution pump A, a refrigerant pump A, a solution pump B, a refrigerant pump B, an internal circulation water pump, an internal circulation medium-temperature hot water system, pipelines, valves and the like, recycled low-temperature waste heat source heat is transferred to internal circulation medium-temperature hot water through the evaporator A and the absorber A, the evaporation temperature of the evaporator B is increased through the internal circulation medium-temperature hot water, the absorption pressure is increased, and the absorber B produces a high-temperature heat source; the generator and the condenser adopt independent cylinders, the pressure bearing capacity and the thermal displacement capacity of the unit are improved, the generating pressure and the condensing temperature are increased, and a high-temperature heat source can be produced. The unit expands the application field, realizes single-machine ultra-large type, reduces the total investment, and improves the comprehensive utilization rate of energy.

The utility model discloses a kind of efficient vertical packing gland gas heat exchangers, including pressure-bearing shell, for conveying high-temperature gas's pipe, for conveying low-temperature gas's shell and heat exchange part. Pipe is blocked by heat insulation sleeve pipe and heat insulation layer and is transmitted to shell wall and shell course upper cavity, upper tube sheet can be moved up and down to compensate thermal expansion difference, shell course sets up packing gland sealing and solves thermal displacement compensation problem, support cylinder and annular baffle cooperation guide low-temperature gas to flow through all heat exchange area, improve heat exchange efficiency;Baffle plate enhances shell course gas turbulence, and guide distribution blade optimizes upper cavity area airflow distribution. The utility model is through multiple heat insulation, displacement compensation and fluid path optimization design, significantly improve heat exchange efficiency, prolong the life of equipment, reduce maintenance cost, with wide application prospect.