1286 results about "Reciprocating compressor" patented technology

The invention belongs to the industry of natural gas, and particularly relates to a removable compressor grouting formula, which is applied to a skid-mounted unit of a reciprocating compressor. The removable compressor grouting formula adopts the following technical scheme that the removable compressor grouting formula is characterized in that a new grouting material of the skid-mounted unit of the reciprocating compressor is adopted, the material is prepared in the step of mixing cement with sand according to the proportion of 11:16, the grouting material can flow to all bottom surfaces of askid base by using a proper amount of water, and a short curing period can be guaranteed. A pipeline which is connected with the unit is removed when the whole skid-mounted unit of the reciprocating compressor needs to be moved, and one corner of the bottom skid-mounted unit is pulled by using a crane or a jack, so that the whole skid-mounted unit is separated from a foundation. According to the removable compressor grouting formula, the reuse of equipment is greatly increased, so that the cost is reduced, the waste of resources is reduced, and the original zero feasibility can become feasible.

A reciprocating compressor driven by a linear motor, comprising a shell, within which are mounted: a reference assembly formed by a motor and a cylinder (1); a resonant assembly formed by a piston (2) reciprocating inside the cylinder (1), and by an actuating means (3) operatively coupling the piston (2) to the motor; two spring means (10) mounted to the resonant assembly and to the reference assembly and which are elastically and axially deformed in the displacement direction of the piston (2); a mounting element (40) coupling an end of one spring means (10) to an end of the other spring means (10); and a coupling element (50) mounted to the piston (2) and to the mounting element (40), which is axially displaced together with the piston (2) and displaced freely and transversally to the displacement direction of the piston (2), said coupling element (50) transmitting the axial forces between the piston (2) and the mounting element (40) and minimizing the application of radial forces to the piston (2).

Disclosed are an apparatus for controlling a driving of a reciprocating compressor capable of enhancing an efficiency by differently controlling a frequency and a stroke voltage according to a load size and capable of reducing consumption power, and a method thereof. The apparatus comprises a controlling unit for judging a load size by comparing a phase difference between a detected current and a stroke with a reference phase difference, and outputting a frequency control signal and a stroke control signal according to the judged load size.

The present invention relates to an apparatus and method for controlling operation of a reciprocating compressor. The operating efficiency of the compressor can be improved by performing the steps of: detecting a current and a stroke applied a compressor; a calculating a mechanical resonance frequency by using the detected current and stroke; and determining an operating frequency command value by adding or subtracting the present operating frequency so as to be within a predetermined range of the calculated mechanical resonance frequency and then driving the compressor by the operating frequency command value.

An apparatus for controlling an operation of a reciprocating compressor includes a inductance increasing device connected to a motor of the reciprocating compressor, so that a surge current generated when power is applied to the reciprocating compressor at an initial stage is reduced and thus an initial stroke of the reciprocating compressor is reduced. Accordingly, operational efficiency of the reciprocating compressor is improved.

The present disclosure details a thermoacoustic driven compressor having a pressurized housing, which contains within a thermoacoustic engine and a working gas, coupled to a positive displacement reciprocating compressor. The thermoacoustic driven compressor generates scalable compressed air from a given heat source.

A reciprocating compressor includes: a cylinder installed inside a casing and having a space therein; a piston disposed inside the cylinder; an inner stator fixed at an outer circumference of the cylinder; a magnet fixed at an outer circumference of the inner stator; and an outer stator disposed to maintain a certain distance from an outer circumference of the magnet. Accordingly, the number of components is reduced thus to reduce a manufacturing cost, and performance can be also improved.

An apparatus and method for continuously monitoring selected parameters of reciprocating compressor cylinders is disclosed, the apparatus includes a plurality of sensors positioned to monitor selected parameters within the cylinder on either side of the piston, with the selected parameters including pressures on each side of the piston for each cycle, temperatures of the gas entering and exiting the cylinder, and vibrations of components such as a piston shaft within the cylinder. A calculator means in close proximity to the cylinder receives the signals from the sensors and analyzes the signals for each cycle of the piston. Output signals proportional to the monitored signals are transmitted to a remotely located computer. The output signals include pressure versus volume curves for each cylinder volume, horsepower consumed by the cylinder, inlet suction and outlet discharge gas temperatures of the gases moved through the cylinder, and compression and tension stress on the piston rod. Computer analyses compare monitored signals to pre-selected ranges of operating parameters to provide alarm signals to alert operators of the performance and mechanical conditions within the monitored reciprocating compressor cylinder. A method of operation for continuously monitoring selected parameters of reciprocating compressor cylinders is also disclosed.

A coil spring in accordance with the present invention includes inner coils formed as a wire is wound plural times; and an inflection portion having a nonlinear shape and formed at an outer circumferential surface of the end coil, which is positioned toward the inner coil. When connected to other component and is constricted and relaxed to absorb an impact or a vibration transmitted from the outside, the coil spring minimizes friction generated between itself and other components so that reliability of a reciprocating compressor having the coil spring can be improved.

A reciprocating compressor with a gas bearing is configured to support a portion between a cylinder and a piston by the gas bearing and induce a resonating motion of the piston by the use of compression coil springs. Therefore, a proper resonating motion of a vibrating body can be induced by the use of the gas bearing, without using plate springs, and accordingly manufacturing costs and the number of assembly processes can be reduced and the installation direction of the compressor can be freely designed.

The invention discloses a reciprocating-type compressor fault diagnosis method based on multi-sensor information fusion, and the method is characterized by comprising the following steps of 1, collecting data; 2, constructing a fault characteristic sub-space and a fault space; 3, obtaining a fault diagnosis network; 4, acquiring characteristic fusion diagnosis results; and 5, carrying out D-S evidence theory decision-level fusion diagnosis, and giving out a decision-level diagnosis result. The method has the advantages of convenience in application, high diagnosis accuracy and applicability to a production site of reciprocating-type compressors of petroleum chemical industrial enterprises.

A reciprocating compressor comprises a cylinder having a cylinder side gas flow path for guiding refrigerant discharged to the discharge space to an inner circumferential surface of the cylinder and a piston having a piston side gas flow path communicating with the cylinder side gas flow path to distribute and supply the refrigerant guided through the cylinder side gas flow path between the cylinder and the piston. Also, an outlet of the gas flow path is formed in the piston and an inlet of the gas flow path is formed in the cylinder.

The invention discloses a fault detection method and a fault detection device of a reciprocating compressor. The method comprises the following steps of acquiring vibration signal parameter characteristics of the reciprocating compressor and thermal parameter characteristics comprising an air inlet temperature, an exhaust temperature, air inlet pressure and exhaust pressure of a cylinder; generating a state characteristic index set according to the vibration signal parameter characteristics; generating a working condition characteristic index set according to the vibration signal parameter characteristics and the thermal parameter characteristics; constructing a state characteristic radial basis function (RBF) fault diagnosis model and a working condition characteristic RBF fault diagnosis model respectively according to the state characteristic index set and the working condition characteristic index set; and generating a fault detection result by using a D-S evidence fusion theory according to the state characteristic RBF fault diagnosis model and the working condition characteristic RBF fault diagnosis model. By the method and the device, monitoring information of two detection means are fused, so that the accuracy rate of a judgment conclusion is remarkably improved; and the method and the device are easy and convenient to operate, low in cost, high in accuracy rate and easy to popularize and apply.

The invention discloses a reciprocating compressor fault diagnosis system and method based on a neural network algorithm. The reciprocating compressor fault diagnosis system and method based on the neural network algorithm comprises a field communication module, a data collecting module, a simulation model based on neural networks, an expert system module based on standard fault characteristics, afault diagnosis main machine and an upper computer. According to the reciprocating compressor fault diagnosis system and method based on the neural network algorithm, the neural network algorithm isutilized, measured compressor system status parameters are combined, and thus simulation models in all working conditions are acquired; compressor faults are simulated by changing system parameters tocalculate and obtain the standard fault characteristics, after the abnormal operation of the compressor occurs, through the comparison with the standard fault characteristics, fault parts can be accurately located, and elimination methods can be brought; and the diagnosis success rate is high, and real-time monitoring analysis of high precision equipment is not needed, and the diagnosis cost is lowered.

In a stroke control apparatus of a reciprocating compressor and a method thereof, the stroke control apparatus of the reciprocating compressor includes a reciprocating compressor, a current detecting unit for detecting a current flowing in a motor of the reciprocating compressor, a stroke detecting unit for detecting a piston stroke by using a voltage and a current applied to the motor of the reciprocating compressor, a phase difference detecting unit for detecting a phase difference by receiving the piston stroke from the stroke detecting unit and the motor current from the current detecting unit, an operational frequency determining unit for determining an operational frequency corresponded to an operation region according to the detected phase difference, a frequency/stroke storing unit for storing a piston stroke value by the determined operational frequency, a reference stroke value determining unit for determining a reference stroke value corresponded to the determined operational frequency by using the stroke value pre-stored in the frequency/stroke storing unit, a control unit for comparing the reference stroke value with a present piston stroke value after a certain time point and outputting a stroke control signal according to the comparison result and an inverter for varying an operational frequency and a voltage applied to the motor of the reciprocating compressor according to the stroke control signal of the control unit.