62 results about "Rotary-screw compressor" patented technology

The invention discloses a multistage closed-loop recovery method and system for industrial flue gas waste heat, and particularly relates to the technical field of waste heat recovery. The method comprises the following steps: predicting a process steam demand through a high-temperature section temperature parameter in flue gas monitoring data, and predicting a preheating medium demand based on a low-temperature section temperature parameter in the flue gas monitoring data; inputting the high-temperature-section demand prediction result and the low-temperature-section demand prediction result into a dynamic heat balance equation, calculating an optimized set point of a three-stage compressor unit, and adjusting the rotating speeds of a centrifugal compressor, a screw compressor and a scroll compressor by adopting a fuzzy PID (Proportion Integration Differentiation) algorithm; collecting temperature and flow data of secondary waste heat after the industrial equipment is reused, and generating secondary waste heat monitoring data; according to a compressor adjusting instruction and secondary waste heat monitoring data, the real-time opening degrees of the two-way stop valve and the electric adjusting valve are controlled, backflow of secondary waste heat to the interstage heat exchanger set is achieved, closed-loop recycling of industrial flue gas waste heat is completed through countercurrent flow heat exchange, and the waste heat recycling efficiency and the system stability are improved.

The invention discloses a segmented reverse rotor structure of a two-stage compression oil injection screw compressor. The segmented reverse rotor structure comprises a machine shell, a rotor and a rotor, the first-stage male rotor is rotatably installed in the first-stage compression chamber of the machine shell, and one end of a rotor shaft of the first-stage male rotor penetrates through a partition piece of the first-stage compression chamber and a partition piece of a second-stage compression chamber of the machine shell and extends into the second-stage compression chamber; the first-stage female rotor is rotatably mounted in the first-stage compression chamber and engaged with the first-stage male rotor; the second-stage male rotor is rotatably mounted in the second-stage compression cavity and coaxially connected to a rotor shaft of the first-stage male rotor, and the spiral direction of the second-stage male rotor is opposite to that of the first-stage male rotor; the second-stage female rotor is rotatably mounted in the second-stage compression chamber and engaged with the second-stage male rotor; and the cooling chamber is connected with a cooler through the oil return pipe. The two-stage screw compressor solves the problems that in an existing two-stage screw compressor, the load of axial bearings of the first-stage male rotor and the second-stage male rotor is large, and the service life is short.

The utility model belongs to the technical field of screw compressors, and discloses a self-cooling screw compressor which comprises a compressor body, a circulating cooling system is arranged on the outer surface of the compressor body, the input end of the circulating cooling system is connected with a refrigerating device, and the output end of the circulating cooling system is connected with a circulating water tank. The circulating water tank is arranged at the tail end of the refrigerating device, and the refrigerating device is covered with the heat dissipation device. The refrigeration device comprises two refrigeration cabins, the two refrigeration cabins are arranged in the installation cylinder from front to back in a spaced mode, and one end of the installation cylinder is connected with the tail portion of the compressor body in a fastened mode. Compared with a conventional water-cooling or air-cooling heat dissipation structure, the compressor achieves refrigeration through the semiconductor, the refrigeration effect is remarkable, normal long-time operation of equipment can be effectively guaranteed, the semiconductor technology is mature, the price is low, and great convenience is brought to operation and maintenance of the equipment.

The invention relates to a screw compressor (300), comprising a compressor block having a compressor housing (312), wherein two compressor screws (312a) are received and can be rotated in the compressor housing (312), the compressor housing (312) has an upstream inlet (314) for gas to be compressed and a downstream outlet (318) for compressed gas and, during an operation of the screw compressor (300), the gas is conveyed from the inlet (314) to the outlet (318), the pressure of the gas being increased by reducing the size of a movable chamber (320), which is formed by the compressor screws (312a), in the flow direction after the chamber has passed a control edge (322). According to the invention, the compressor housing (312) has a separation between a downstream high-temperature region (324) and an upstream low-temperature region (326), a material with a reduced thermal conductivity compared to the high-temperature region (324) being present at least in the region of the separation.

The utility model discloses an air inlet filter for an air compressor, which relates to the technical field of filters, and comprises an air filtering piece for filtering air, and the air filtering piece is arranged at the air inlet end of a top cover; the top cover is mounted in the tank body filled with lubricating oil in a matched manner; an air inlet channel is formed in the top cover, and an air pipe is fixed below the air inlet channel; the lower end of the air pipe is immersed in the lubricating oil; according to the utility model, under the extraction of the reciprocating compressor or the screw compressor, external air enters the outer shell through the top cover, passes through the filter and the filter element and then enters the air inlet pipe; the air enters the air inlet channel in the top cover, then the air is conveyed into the lubricating oil through the air pipe, when the air is pumped away again, the air carries part of the lubricating oil component, and therefore an air path of the compressor can be conveniently lubricated. Due to the arrangement of the filter and the filter element, dust carried in the air is reduced, and the cleanliness of the air entering the air compressor is guaranteed.

The invention discloses a screw compressor, relates to the technical field of compressors, and aims to solve the problem of poor heat dissipation effect of the screw compressor. The key points of the technical scheme are as follows: the machine shell comprises an outer shell and an inner shell, and two ends of the outer shell and the inner shell are fixedly connected with each other; the male rotor and the female rotor are meshed with each other and are arranged in the inner shell, and the tooth surfaces of the male rotor and the female rotor are coated with wear-resistant coatings; the suction end seat and the exhaust end seat are respectively arranged at two ends of the shell, and a cooling channel is arranged in the suction end seat; and the driving device is arranged at one end of the shell and used for driving the male rotor to rotate. According to the invention, the spiral reverse and tapered cooling cavity design is matched with the flow guide partition plate, so that the flowing path and the heat exchange time of a liquid refrigerant are greatly prolonged, the gradually increased thermal load of the compressor from air suction to air exhaust is matched through the change of the cross section of the flow channel, efficient and uniform cooling is realized, and the thermal deformation of a rotor and a machine body is effectively controlled.

The present invention discloses a cooling system and method for liquid sulfur dioxide production, including the following equipment: an analytical tower, a sulfur dioxide cooler, a buffer tank, a sulfur dioxide drying tower, a drying circulation tank, a screw compressor, a gas-liquid separation tank, an evaporative condenser, and a sulfur dioxide storage tank. The wet sulfur dioxide gas at the outlet of the analytical tower is mixed with liquid sulfur dioxide and cooled through a sulfur dioxide cooler to separate most of the water in the wet sulfur dioxide. The cooled sulfur dioxide gas enters a buffer tank for buffering and then enters a drying tower. After drying, it enters a screw compressor. The sulfur dioxide gas enters an evaporative condenser after being pressurized and liquefied into a sulfur dioxide storage tank. The present invention utilizes the heat absorption principle of sulfur dioxide vaporization and uses sulfur dioxide as a refrigerant to replace circulating water, thereby greatly reducing the safety risks caused by cooler leakage.

A screw compressor includes a screw rotor, a gate rotor, and a casing that form a compression chamber. A case outlet is formed in a case outer wall of the casing. A discharge port communicates with the case outlet, and is formed in a portion of the casing facing the compression chamber. The discharge port has first and second end on first and second opposite sides in the axial direction. The case outlet is located between a first position away from the first end toward the first side in the axial direction by a radius of the gate and a second position away from the second end toward the second side in the axial direction by the radius of the gate. The case outlet is located closer to the discharge port than to the screw rotor in the radial direction.

The application provides a compressor auxiliary installation device and an assembly table. The compressor auxiliary installation device is used for installation of an inner bearing of a screw compressor. The screw compressor comprises a body, a first end cover, a second end cover, at least one support shaft and at least one four-point contact ball bearing. The four-point contact ball bearing is arranged on the support shaft and abuts one of the first end cover and the second end cover. The four-point contact ball bearing comprises balls and a first mounting part. The balls are rotatably arranged on the first mounting part, and the first mounting part is sleeved on the support shaft. The compressor auxiliary installation device comprises at least one test part. The test part is sleeved on the support shaft. The test part abuts the balls and the first mounting part respectively. The side, away from the first mounting part, of the test part abuts one of the first end cover and the second end cover. In the radial direction of the support shaft, the test part and the support shaft are detachably connected. The test part is convenient to dismount or mount on the support shaft.

The present invention relates to a compressor, in particular a screw compressor (2) for compressing a working medium, comprising an outer casing (10) with an inlet opening (11), an outlet opening (12) and a longitudinal axis (X), a driveable compression device (20) arranged in the outer casing (10) with at least one rotatable rotor (25), and at least one compressor outlet (50), wherein the at least one compressor outlet (50) directs the working medium compressed by the compression device (20) into an interior space (45) arranged in the outer casing (10), wherein a first demister (60) is arranged in the interior space (45), and wherein the at least one compressor outlet (50) is directed towards the first demister (60) in order to supply the compressed working medium to the first demister (60). Furthermore, the present invention relates to a refrigeration system (1) with a screw compressor (2).

A screw compressor includes: a containment body including: a suction chamber and a suction port for a fluid to be compressed; a delivery chamber and a discharge port for the compressed fluid; a containment seat for two helical compression rotors; two helical compression rotors; an electric motor to actuate the helical compression rotors; lubrication for the helical compression rotors; filtration of the compressed fluid; an inverter connected to the electric motor; an electronic control unit configured to control the inverter; a low-pressure sensor located at the suction port and connected to the electronic control unit; a high-pressure sensor located at the discharge port and connected to the electronic control unit; an adjustment spool configured for adjusting the width of an outlet opening from the compression rotor chamber; a fluid actuator to move the adjustment spool; a current meter that measures the electric current absorbed by the electric motor.

The utility model discloses an air compressor for an air-cooled diesel engine, which comprises a base, the air-cooled diesel engine is mounted at the top of the base, the power output end of the air-cooled diesel engine is connected with a screw compressor, and the output end of the screw compressor is connected with an oil-gas separator. The output end of the oil-gas separator is connected with external equipment, and the air-cooled diesel engine, the screw compressor and the oil-gas separator are connected with a screw oil radiator. The cooling mode of a traditional air compressor is solved, anti-freezing liquid does not need to be injected, a radiator device is not needed, an intercooling pressurizing radiator is not needed, and the manufacturing cost of the air compressor is reduced; the permanent irreversible damage to an engine caused by the fact that integrated air cooling is used for replacing traditional water circulation cooling in the extremely low-temperature environment of air compressor equipment is avoided. The application blank of products for globally subdividing regional special environments of engineering machinery is broken through, and a more stable and reliable technical product is provided for engineering construction in the ultralow-temperature environment.

This invention discloses a centralized VOCs gas recovery device and process for zero emissions at a station, belonging to the field of ecological governance technology. The specific steps of the process are as follows: I. Before gas recovery, the water cooling system and hydraulic system are debugged and safety parameters are set, while the status of each valve is checked; II. The triethylene glycol tail gas and VOCs gas in the venting main are collected and pretreated, and the pretreated triethylene glycol tail gas and VOCs gas are pressurized in one stage. This invention ensures a non-combustion state, reduces the workload of on-site installation and maintenance, simplifies the overall recovery process, eliminates the need for the high power consumption and complex frequency conversion control of conventional reciprocating machines and screw compressors, reduces energy loss, reduces operating costs, and comprehensively avoids risks such as equipment overpressure, gas backflow, and flare backfire, ensuring system safety and stable recovery efficiency. Therefore, we propose a centralized VOCs gas recovery device and process for zero emissions at a station.

Screw compressors and screw compressor systems are disclosed in which the compressors include an oil injection port that injects oil into the compression chamber during a compression cycle. The oil injection port is located in an outer wall of the cylindrical bore within the compressor housing in which the main rotor is rotationally mounted. The oil injection port is located and configured to inject oil into the compression chamber during a time period such that the average pressure ratio of the pressure of the compression gasses within the compression chamber relative to the suction pressure during the time period is reduced as compared to standard compressors. The design of the oil injection port allows screw compressor systems to not include an oil pump.

A screw compressor includes a first seal, a second seal, and a third seal which are non-contact seals from a rotor side to a bearing side of a shaft seal portion, a compressed gas supply device which is different from a rotor that supplies compressed gas between the first seal and the second seal, and a heating device that heats the compressed gas supplied between the first seal and the second seal from the compressed gas supply device.

The utility model discloses a multi-exhaust pressure screw type compressor which comprises a support, a compressor assembly fixedly connected to the top of the support and a sliding valve assembly arranged on the left side of the compressor assembly in a penetrating mode, an adjusting mechanism is fixedly connected to the left side of the top of the compressor assembly, and the adjusting mechanism comprises a fixing plate. A motor is fixedly connected to the right side of the top of the fixing plate, a transmission disc is fixedly connected to the output end of the motor, a rotary pin is fixedly connected to the right side of the top of the transmission disc, a transmission rod sleeves the surface of the rotary pin, a pin shaft is movably connected to the left side of the transmission rod through a bearing, and a first longitudinal plate is fixedly connected to the left side of the pin shaft. According to the screw type compressor, the phenomenon that multiple exhaust ports are formed for multiple exhaust pressures traditionally is changed, the concave rod is adopted to drive the sliding valve assembly to be adjusted left and right, the phenomenon that the multiple exhaust ports are formed to affect the overall sealing performance is avoided, and the situation that the use quality of the screw type compressor cannot be guaranteed is avoided.

The invention relates to an efficient compressed air energy storage system based on screw-slip sheet-centrifugal three-stage compression. The efficient compressed air energy storage system comprises a gas pretreatment device, a gas compression device and an energy collecting and using device. The gas pretreatment device is used for treating gas and inputting the gas into the gas compression device; the gas compression device compresses gas step by step through a screw compressor, a sliding vane compressor and a centrifugal compressor which are connected in sequence and is used for completing first-stage compression, second-stage compression and third-stage compression of the gas. The energy collecting and using device comprises a pressure energy conversion device and an electric energy storage device, the pressure energy conversion device is used for converting pressure energy of the compressed gas into electric energy, and the electric energy is stored through the electric energy storage device. According to the compressors arranged according to the compression sequence, the high compression ratio can be achieved, energy can be reasonably utilized according to the characteristics of different compressors in the compression process of each stage, the compression efficiency is improved, and therefore the purpose of balancing the compression ratio and the efficiency is achieved.

An extruder is provided with: a screw rotationally driven about the axis by a first motor; a barrel having a screw hole into which the screw is inserted and a de-airing port configured to discharge air inside the screw hole; a filter configured such that a part thereof faces the de-airing port of the barrel; and a filter-driving mechanism configured to move the filter to shift the part of the filter facing the de-airing port.

The invention discloses an energy-saving control method for a screw compressor, which comprises the following steps: acquiring operating parameters of the screw compressor, judging whether the operating parameters of the screw compressor are in respective threshold ranges or not, and when the operating parameters of the screw compressor are in respective threshold ranges, calculating an internal volume ratio and an external pressure ratio; comparing the value of the internal volume ratio with the value of the external pressure ratio, when the absolute value of the difference value of the internal volume ratio and the external pressure ratio is smaller than or equal to a threshold value, judging that the compressor is in an energy-saving operation state, continuously collecting parameters, controlling the compressor to operate in real time to maintain the energy-saving state, and when the absolute value of the difference value of the internal volume ratio and the external pressure ratio is larger than the threshold value, judging that the compressor is in an energy-saving operation state. The position of the slide valve is adjusted by comparing the value of the internal volume ratio with the value of the external pressure ratio. According to the method, the compressor can operate in the optimal energy-saving state under various complex working conditions by accurately controlling the internal volume ratio and the external pressure ratio of the compressor to be equal and combining optimization adjustment of other key parameters.

This compressor unit (10) is provided with: a screw-type compressor body (11); a water introduction unit (31) for introducing water into a compression chamber of the compressor body; a first silencer (18) positioned below the compressor body; a first collector (20) configured to cool a gas that has passed through the first silencer and store condensed water; a first communication pipe (19) that connects an outflow port of the first silencer and an inflow port of the first collector to each other; and a compressor stand (45) that supports the compressor body and has a space for disposing the first silencer on the lower side of the compressor body. The length of the first communication pipe is shorter than the total length of the first collector.

The utility model belongs to the technical field of PTA (pure terephthalic acid) powder conveying nitrogen recycling, and discloses a PTA powder conveying nitrogen recycling device which comprises a screw compressor unit, a rotary valve, a stock bin, a bag type dust collector, a basket type filter and a compressor inlet cooler. The rotary valve is communicated with the stock bin, the bag filter is installed on the stock bin through a flange, the bag filter is connected with the basket filter through a pipeline, the basket filter is connected with the compressor inlet cooler through a pipeline, and nitrogen for conveying powder serves as circulating nitrogen to be fed into the system again. The conveyed nitrogen needs to pass through the bag type dust collector and the basket type filter to filter dust carried in the conveyed nitrogen after conveying powder, and the nitrogen recycling device has the advantages that the nitrogen can be recycled, the use of fresh nitrogen is effectively reduced, and the operation cost is reduced.

The invention discloses a segmented reverse rotor structure of an oil injection screw compressor, comprising: a casing, in which a first-stage compression chamber and a second-stage compression chamber are formed; the first-stage male rotor is rotatably mounted in the first-stage compression cavity, and a first-stage female rotor is rotatably mounted in the first-stage compression cavity; the second-stage male rotor is coaxially connected to the first-stage male rotor and is rotatably mounted in the second-stage compression cavity, a second-stage female rotor is rotatably mounted in the second-stage compression cavity, and the spiral direction of the second-stage male rotor is opposite to that of the first-stage male rotor; the transfer cavity is formed in the shell wall of the machine shell, an air suction port communicating with the first-stage compression cavity is formed in the outer side of the machine shell, a communicating hole channel communicating with the first-stage compression cavity and the transfer cavity is formed in the middle partition plate, and an output port communicating with the second-stage compression cavity and the transfer cavity is formed in the inner side of the machine shell; an exhaust port communicating with the transfer cavity is formed in the outer side of the machine shell. The screw compressor solves the problem that when an existing screw compressor operates, the load of the axial bearing at the end of the rotor is large.

The utility model discloses a kind of two-stage compressor and air conditioning system, the two-stage compressor includes suction end cover, further include the screw compressor for the low-pressure stage part of the two-stage compressor, and the sliding vane compressor for the high-pressure stage part of the two-stage compressor;The screw compressor and the sliding vane compressor are connected in series in the rear end of the suction end cover.Compared with prior art, the utility model uses the two-stage compressor of low-pressure stage for screw compressor, high-pressure stage for sliding vane compressor, compared with traditional two-stage screw compressor can be applied to lower exhaust capacity, and with smaller volume and lower cost, higher operating stability.

A screw compressor includes a screw rotor having a plurality of helical grooves, and a gate rotor with gates to mesh with the helical grooves. Each of the gates first and second seal lines to come into contact with side wall surfaces of the helical grooves. Shapes of the first and second seal lines are asymmetric with respect to a first imaginary straight line passing through a rotation center of the gate rotor and a first intermediate position located on a tip end side of each of the gates between the first and second seal lines. A second imaginary straight line passing through the rotation center and a second intermediate position located on a base end side of each of the gates between the first and second seal lines is inclined with respect to the first imaginary straight line. The helical grooves have shapes corresponding to the gates.

The application discloses a device fault detection method and device and a storage medium. In one aspect, the prior probability of occurrence of each fault cause is determined based on the operation data of a screw compressor, and the likelihood probability of occurrence of a target fault under the condition of occurrence of each fault cause is determined, the posterior probability of occurrence of each fault cause corresponding to the occurrence of the target fault is calculated according to the prior probability and the likelihood probability, and the detection order of all fault causes when the target fault occurs is determined according to the size of the posterior probability of occurrence of each fault cause. In another aspect, the time sequence data of a characteristic parameter is monitored to determine whether the preset range under the current working condition is met, so that the reliability of subsequent fault causes is improved.

The utility model relates to the technical field of tail gas treatment and discloses an efficient tail gas treatment device which comprises a purification cylinder, an interception box is fixedly arranged on the inner wall of the purification cylinder, an air inlet pipe is fixedly arranged on one side of the purification cylinder, and an efficient conveying structure is arranged on one side of the air inlet pipe and comprises a main pipe. Two auxiliary pipes are fixedly arranged on one side of the main pipe, screw compressors are fixedly arranged on one sides of the auxiliary pipes, C-shaped pipes are fixedly arranged on one sides of the two screw compressors, one sides of the C-shaped pipes are fixedly connected with the air inlet pipe, and control valves are fixedly arranged at the front ends of the auxiliary pipes. The efficient tail gas treatment device disclosed by the utility model can prevent the screw compressor from being damaged to interrupt gas feeding.

The utility model discloses a lubricating mechanism of a screw compressor, which comprises a screw compressor body, the outer wall of the top of the screw compressor body is fixedly connected with two oil tanks, the interiors of the oil tanks are movably connected with push plates, the tops of the push plates are fixedly connected with springs, and the springs are fixed with the inner walls of the tops of the oil tanks. An oil inlet is formed in the top of the screw compressor body, a connecting block is fixedly connected between the two oil tanks, a sliding groove is formed in the connecting block, a connecting rod is movably connected to the top of the connecting block, a check block is fixedly connected to the bottom end of the connecting rod, and the check block blocks the oil inlet. According to the screw compressor, a worker can conveniently and rapidly add lubricating oil into the screw compressor body, meanwhile, the baffle can stably block the oil inlet through the fixing assembly, and a large amount of lubricating oil can be prevented from entering the top position of the connecting block through the first sealing ring.

This application discloses a screw compressor, a device with the screw compressor and us method, a cooling structure is disposed in the screw compressor, hollowed out portions are disposed on the chamber body of the cooling structure, the chamber body is provided with a solid structure between the hollowed out portions, therefore the structural strength of the chamber body is enhanced, at the same time, the chamber body is also divided into a plurality of interconnected independent hollowed out portions, contributes to increase the flow rate and uniformity of flow of the cooling medium, and enhances the cooling effect, and then effectively controls the deformation of the shell caused by temperature.

The utility model relates to a novel single-screw water lubrication compressor, which belongs to the technical field of compressors and comprises a shell, a main shaft system is mounted in the shell, stationary rings are fixedly mounted on two sides of the main shaft system in the shell, and movable rings are fixedly mounted on one sides of the stationary rings in the shell. A gland is installed in the shell and located on one side of the main shaft system, a disassembling assembly is arranged in the gland, and a water injection hole is formed in the gland. The single-screw compressor has the beneficial effects that after the single-screw compressor is assembled, a worker can inject water into the main shaft system through the water injection hole, so that the single-screw compressor takes water as a lubricating and working medium, a large amount of oil is saved, the pollution of a traditional bearing taking oil as a lubricating medium to the environment can be avoided, and the service life of the single-screw compressor is prolonged. And meanwhile, water has the characteristics of no pollution, wide source, high safety, low price and the like, so that the requirements of occasions with high working condition requirements can be met.

The oil path self-cleaning device, method, system, electronic equipment and storage medium provided by the embodiment of the present application can realize the effects of automatic adsorption of impurities and automatic removal of impurities by configuring at least one sedimentation pipe, an electromagnetic adsorption device and a decontamination device for the sedimentation pipe in the oil path self-cleaning device, winding an electromagnetic circuit of the electromagnetic adsorption device around the sedimentation pipe, configuring the oil path pipe with the screw compressor, opening a connecting port on the side of the oil path pipe, connecting a first sedimentation pipe port of the sedimentation pipe with the connecting port, and connecting a second sedimentation pipe port of the sedimentation pipe with the decontamination device.