39 results about "Rotary-screw compressor" patented technology

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.

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).

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 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.

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.

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.

The invention provides a double-unit double-stage screw type refrigeration compressor unit special for stratum freezing. Comprising a low-pressure-stage compressor, a low-pressure-stage variable frequency motor, a lamella heat exchanger, a high-pressure-stage compressor, a high-pressure liquid reservoir, an evaporative condenser, a high-pressure-stage power frequency motor, an oil separator, a thermosyphon oil cooler, an oil pump, an oil fine filter, a brine pump, a brine tank, a thermosyphon evaporator, a throttle valve and a console. According to the special double-unit double-stage screw type refrigeration compressor unit for stratum freezing, the frequency conversion technology and the unique characteristics of operation of the double-unit double-stage screw type refrigeration compressor unit are combined, flexible adjustment of the volume ratio of the high-pressure-stage compressor to the low-pressure-stage compressor at different temperature points can be achieved, the highest efficiency is achieved, the refrigerating capacity of the medium-temperature stage is improved, the use cost is reduced, and the working efficiency is improved. The motor efficiency and the refrigerating capacity in the low-temperature stage are improved, the freezing time is shortened while energy is saved, and disassembly, installation and transportation are convenient.

A compressed air station includes at least two compressed air components that yield waste heat. Each compressed air component is designed either as a compressor, in particular as a screw compressor, or as a refrigeration dryer. The compressed air station includes at least one exhaust air duct for discharging waste heat from a room, and at least one of the compressed air components, namely a refrigeration dryer, is connected to the exhaust air duct, and a further compressed air component is connected to the same exhaust air duct.

The invention is applicable to the technical field of petroleum and natural gas development, and provides a natural gas wellhead supercharging device for petroleum gas exploitation, which comprises a conveying pipeline arranged on a gas-liquid separator, the screw compressor and the piston compressor are mounted on the conveying pipeline and used for pressurizing natural gas; the cooler is arranged on the conveying pipeline and used for cooling the natural gas, and the cooler is arranged between the screw compressor and the piston compressor; the bases are fixedly mounted at the bottoms of the screw-type compressor and the piston-type compressor respectively; and the heat dissipation mechanisms are respectively arranged on the bases and are used for dissipating heat of the screw compressor and the piston compressor. The natural gas wellhead supercharging device for petroleum gas exploitation has the advantages of being simple in structure, high in supercharging efficiency, low in equipment failure rate, high in overall system stability and reliability and the like, and meets the natural gas supercharging requirement in the petroleum gas exploitation process in the petroleum and petrochemical industry.

The application provides a double-machine double-stage screw refrigeration compressor unit special for ground freezing, which comprises a low-pressure stage compressor, a low-pressure stage variable frequency motor, a plate-and-shell heat exchanger, a high-pressure stage compressor, a high-pressure liquid accumulator, an evaporative condenser, a high-pressure stage power frequency motor, an oil separator, a hot siphon oil cooler, an oil pump, an oil fine filter, a brine pump, a brine pool, a hot siphon evaporator, a throttle valve and a control console. The double-machine double-stage screw refrigeration compressor unit special for ground freezing combines the variable frequency technology and the unique features of the double-machine double-stage screw compressor unit operation, can realize flexible adjustment of the volume ratio of the high-pressure stage compressor and the low-pressure stage compressor at different temperature points, reaches the highest efficiency, improves the refrigerating capacity at the medium temperature stage, reduces the use cost, improves the motor efficiency and the refrigerating capacity at the low temperature stage, shortens the freezing time while saving energy, and is convenient for dismounting, installing and transporting.

The utility model relates to the technical field of oil-gas separation equipment, in particular to an air compressor air inlet pipe oil-gas separation device which comprises an outer shell, a one-way valve and an air inlet are sequentially arranged on the surface of the top end of the outer shell, an air outlet is formed in the surface of the bottom end of the outer shell, and a closed cavity is formed in the outer shell. A plurality of steel angles are arranged on the surface of the top end of the partition plate, the phenomenon of oil vomiting after the air compressor is suddenly stopped and powered off can be effectively solved while positive long-term operation of the air compressor is not affected, lubricating oil brought out of high-pressure mixed gas from a screw type compression mechanism and lubricating oil in the mixed gas can be recycled, and waste of the lubricating oil is avoided; lubricating oil and oil-gas mixed gas can be effectively prevented from entering the air inlet air filter element through the air inlet butterfly valve, and unnecessary waste of the air filter element is avoided. The air compressor can stably play a role in a dust and vibration working environment for a long time, so that the whole structure is simple, the maintenance is convenient, and the maintenance cost of the air compressor is prevented from being increased.

Slide valve assemblies are provided that have volume slide valve members that are self-positioning, as well as compressors that include such slide-valve assemblies. The self-positioning volume slide valve member automatically slidably adjusts to control compressor volume ratio and power input to the compressor during normal operation of the compressor. A positioning guide assembly includes a pinion gear and a movable rackshaft. The rackshaft engages the volume slide valve member and moves the volume slide valve member to an initial position when the rackshaft moves from a first position to a second position. Thus, the volume slide valve member may be placed in its initial position prior to normal operation of the compressor.

Screw compressor (1) for a conditioning system comprising a housing (2) defining a space (3) and comprising a compressor stage (4) dividing space (3) into a high-pressure space (3'') and a low pressure space (3'), the screw compressor (1) comprising a control system (20) configured to control actuator means (12) in function of a control signal (O) to control the movement of a valve body (11a), the control system (20) comprising elaboration means configured to generate a control signal (O) in function of a pair of operative configurations: - A first configuration corresponding to a maximum efficiency configuration; and - A second configuration corresponding to a minimum noise configuration, wherein the first configuration valve body (11a) is set in first position and wherein in second configuration valve body (11a) is set in a second position.

The invention relates to a method for controlling a rotary screw compressor, having at least a first and a second air-end, wherein both air-ends are driven separately from one another and speed controlled. According to the invention, the following steps are carried out: detection of a volume flow taken at the outlet of the second air-end; adjustment of the rotational speed of both air-ends, when the removed volume flow fluctuates in a range between a maximum value and a minimum value; opening of a pressure-relief valve, if the volume flow falls below the minimum value; and reduction of the rotational speed of at least the first air-end to a predetermined idling speed (V1.sub.L) to reduce the volumetric flow delivered by the first to the second air-end.