38 results about "Pressure phases" patented technology

The invention relates to the technical field of wind turbine generator maintenance, and discloses a wind turbine generator blade unmanned aerial vehicle deicing assembly and method.The wind turbine generator blade unmanned aerial vehicle deicing assembly comprises an unmanned aerial vehicle, and a laser radar and an installation shell integrating an ultrasonic transducer, a pulse nozzle and a hydraulic pump are installed at the bottom of the unmanned aerial vehicle. The deicing control system obtains focus space coordinates and interface resonance frequency of the blade surface by using a space state sensing module; the stress field focusing module calculates the phase delay amount of the ultrasonic transducer, compensates the pose deviation of the unmanned aerial vehicle by adjusting the emission time sequence, and drives the ultrasonic transducer to generate resonance stress on an ice layer-skin interface; and the sound stream synchronous control module determines a jet flow triggering moment according to synchronous phase locking solution, drives a pulse nozzle at an instantaneous negative pressure phase point of a sound wave period to inject a small amount of deicing fluid into an interface crack, and generates shear stress to induce the interface crack to expand and peel off an ice layer. Accurate throwing of deicing energy is achieved, and the icebreaking efficiency is improved on the premise that the safety of the blade structure is guaranteed.

The utility model relates to the technical field of oil and gas field development engineering, in particular to a research experiment device for dissolved CO2 interphase mass transfer in a crude oil system. The experimental device comprises four high-pressure displacement pumps, three intermediate containers, a high-pressure five-way valve, a high-pressure four-way valve, a high-pressure energy accumulator, a high-pressure constant-volume sampling ring, a high-pressure buffer, a high-pressure sampler, a chromatographic analyzer, a programmable constant-temperature box, a high-temperature and high-pressure phase state instrument, a polarization camera and the like. Rapid energy compensation of a two-component fluid can be realized, pressure change disturbance caused by sampling is inhibited, and the interphase mass transfer process and degree of crude oil in which CO2 is dissolved when the crude oil is in contact with light hydrocarbon gas are intuitively tested.

The invention discloses a ring main unit emergency pressure relief automatic triggering method and system linked with air pressure monitoring, and relates to the technical field of ring main units, and the method comprises the following steps: collecting a multi-point air pressure time sequence at the moment of an arc fault of a ring main unit, carrying out the phase difference analysis, and generating a pressure phase distribution diagram; identifying a phase reversal interval based on the phase distribution, and forming a shock wave cancellation risk time sequence result; carrying out superposition reconstruction on the multi-point pressure amplitudes to obtain a spatial superposition pressure evolution diagram; and constructing a continuous risk accumulation curve, and implementing pre-trigger control according to the continuous risk accumulation curve, so that pressure relief is started before shock waves are superposed again. According to the method, through multi-point air pressure phase analysis and spatial superposition reconstruction, shock wave cancellation interference is eliminated, a continuous risk accumulation curve is constructed, and emergency pressure relief trigger delay of the ring main unit is avoided; and front triggering is realized based on a risk accumulation curve, so that pressure relief is started before shock waves are superposed again, the compression peak value of the shell is reduced, and the safety of the ring main unit under an arc fault is improved.

The invention provides a high-voltage phase alternating magnetic material design method based on first principle calculation, which comprises the following steps of: constructing a corresponding crystal model based on various phase structures of a candidate antiferromagnetic material; for each phase structure, setting a plurality of potential antiferromagnetic configurations; determining a stable antiferromagnetic configuration under each phase structure; performing structure optimization on each phase, determining a zero-pressure phase and a high-pressure phase of the candidate material, and obtaining a stable pressure range of each phase structure; the method comprises the following steps: carrying out electronic characteristic calculation, calculating through a first principle to obtain an electronic energy band structure under each phase structure of a candidate material, and observing whether an energy band has a staggered splitting phenomenon so as to judge whether the high-voltage phase of the candidate material has alternating magnetism. According to the method, whether the high-pressure phase of the material has the alternating magnetism or not is analyzed by adopting an economic and accurate method, so that the calculation cost is reduced, and a tedious and time-consuming experimental procedure is avoided, thereby quickening the discovery of the alternating magnetic material.

A fluid pump includes a cam plate that defines an interior cam surface having an eccentric portion and a narrow portion. A hub rotates within the interior cam surface and has a piston cavity that is in communication with an inlet port and an outlet port. A piston member is operably received within the piston cavity to define a suction phase within the eccentric portion and a pressure phase within the narrowed portion. The piston member is biased outward by rotational operation of the hub. During the suction phase, the piston member is biased away from the piston cavity to define a flow cavity that draws fluid from the inlet port. During the pressure phase, the piston member is biased by the narrowed portion into the flow cavity to push the fluid from the flow cavity toward the outlet port.

The present invention discloses a device and method for measuring the phase holdup of a high-pressure pipeline through a double-ring probe. The present invention accurately reflects the variation characteristics of the phase holdup of the multiphase fluid in the high-pressure pipeline and realizes non-intrusive non-contact measurement. Specifically, the double-ring electrode is sealed in the intermediate connection section through a high-pressure sealing structure. The lead electrode leads out the signal of the double-ring electrode and realizes insulation and high-pressure sealing with the housing. The method is to first obtain the relationship curve between the double-ring electrical signal and the phase holdup through high-pressure calibration. A high-frequency alternating voltage is applied to the double-ring electrode, and the phase holdup signal is recorded and displayed through a processing circuit and a data acquisition system. The device proposed by the present invention simultaneously solves the problems of sealing and insulation for high-pressure phase holdup measurement; establishes a high-pressure calibration method; realizes the functional integration of the measurement device and the instrument; has the advantages of compact structure, no interference with the internal flow, flexible application occasions, etc., and is convenient to be installed and used at various positions of the high-pressure pipeline.

A vibration damper (1) includes a container tube (2), an inner tube (3), a piston (4), a piston valve device (5), a bottom valve device (6), a first overflow pipe (11), an electrically operable first control valve (9), and an electrically operable second control valve (10). The inner tube (3) is arranged in the container tube (2). The piston (4) is axially movable in the inner tube (3) and divides the internal space of the inner tube (3) into a first working chamber (AK1) and a second working chamber (AK2). The piston valve device (5) is arranged at the piston (4) and configured to allow the damping medium to overflow between the first working chamber (AK1) and the second working chamber (AK2) during the tension and pressure phases of the vibration damper (1). A compensation chamber (AGK) is provided between the inner circumference of the container tube (2) and the outer circumference of the inner tube (3). The bottom valve device (6) connects the second working chamber (AK2) in the working chamber to the compensation chamber (AGK) so that the damping medium can overflow between the working chamber (AK2) and the compensation chamber (AGK) during the tension and pressure phases of the vibration damper (1). The first overflow pipe (11) is arranged between the inner pipe (3) and the container pipe (2) and provides a first additional flow path (Ü1) from the first working chamber (AK1) in the working chamber to the compensation chamber (AGK).

The invention discloses a gas state evaluation and risk discrimination method based on a pressure time sequence, and the method comprises the steps: collecting a pressure value through a single pressure sensor, and obtaining pressure time sequence data according to different sampling frequencies; performing continuous gradient analysis on the pressure time sequence, and generating four types of phase segments and two-dimensional phase features; a pressure phase hypergraph is constructed, and a hypergraph path composed of super nodes and super edges is formed; constructing and updating a working condition template library, and matching the working condition template library with a current hypergraph path to generate a two-dimensional phase residual signal; a layered state machine is constructed based on the two-dimensional phase residual error, state transition is driven, and a multi-state gas state is output; and generating a risk level according to the polymorphic gas state and the residual signal, executing valve closing and recording an event. According to the method, pressure time sequence data are collected through a single pressure sensor, and precise recognition and risk judgment of the multi-state state of the gas pipeline are achieved in combination with two-dimensional phase feature analysis and multi-layer state machine modeling.

The application provides a high-pressure phase intersecting metamagnetic material design method based on first principle calculation, and comprises the following steps: constructing a corresponding crystal model based on a plurality of phase structures of a candidate antiferromagnetic material; setting a plurality of potential antiferromagnetic configurations for each phase structure; determining a stable antiferromagnetic configuration under each phase structure; performing structure optimization on each phase to determine a zero-pressure phase and a high-pressure phase of the candidate material, and obtaining a pressure range in which each phase structure stably exists; and performing electronic property calculation, obtaining an electronic band structure of each phase structure of the candidate material through first principle calculation, and judging whether the high-pressure phase of the candidate material has metamagnetism by observing whether the band structure has an intersecting splitting phenomenon. The application uses an economical and accurate method to analyze whether the high-pressure phase of the material has metamagnetism, reduces the calculation cost, avoids a complicated and time-consuming experimental procedure, and thus speeds up the discovery of the metamagnetic material.

The invention relates to the technical field of indoor evaluation systems and evaluation methods of a fracturing transformation technology, and discloses a supercritical CO2 fracturing fluid in-situ rheology and visual crack sand-carrying experiment system and method. The experimental system comprises a supercritical CO2 high-pressure phase balance unit, a high-pressure capillary viscosity testing unit, a high-pressure visual dynamic sand-carrying testing unit and a data acquisition and analysis unit. The experimental method comprises capillary viscosity testing and dynamic sand-carrying performance testing. According to the scheme, the sand-carrying experiment and the viscosity experiment are combined, the sand-carrying experiment is used for testing the migration conditions of the supercritical CO2 fracturing fluid obtained by different formulas under different simulated temperatures and pressures, and the viscosity experiment is used for testing the viscosity of the supercritical CO2 fracturing fluid obtained by different formulas, evaluating the friction resistance of the supercritical CO2 fracturing fluid and optimizing the rheological property of the fracturing fluid, so that the friction resistance is reduced, and the fracturing efficiency is improved. Energy consumption is reduced, and operation efficiency is improved.

The utility model discloses an injection pump type mixed feeding device and a reaction system, and belongs to the technical field of injection pumps. The injection pump type mixing feeding device comprises a high-pressure nozzle, a mixing cavity and a discharging cavity which are sequentially connected, the mixing cavity is of a spherical structure, a low-pressure phase pipeline is connected to the mixing cavity, and a high-pressure phase pipeline is connected with the high-pressure nozzle. The high-pressure jet nozzle jets a high-pressure phase to drive an injection phase to mix, the jet pump is small in size, the applicable viscosity range of gas-liquid phase mixing is wide, and the liquid can be mixed with substances such as granular solid catalysts. The size of the high-pressure nozzle can be selected according to the liquid viscosity of the injection phase, the injection angle, the atomization fineness and the size of suitable solid reactants can be adjusted, the structure is simple, and mixing is more sufficient.

The present invention relates to a portable integrated airtightness testing device, which comprises a main body which integrates a micro bidirectional working air compressor, an inlet air supply low-pressure communicating shuttle valve, a safety valve, a pressure reducing valve, a stop valve, a digital pressure relay and a pressure gauge. The micro bidirectional working air compressor is arranged in the middle of the main body, an air cavity f of an air storage unit is arranged on the upper part of the main body, the air cavity f is connected to the digital pressure relay, the air cavities on both sides of the bidirectional piston of the micro bidirectional working air compressor are respectively connected to the air cavity f of the air storage unit through a one-way valve, the air cavities on both sides of the bidirectional piston are respectively connected to the air passages at both ends of the inlet air supply low-pressure communicating shuttle valve arranged on the upper part of the main body; the air cavity f is respectively connected to a safety valve with a forced opening and closing function installed on one side of the main body and a balanced pressure reducing valve installed on one side of the top of the main body, the balanced pressure reducing valve is connected to a stop valve with a discharge function installed on the other side of the main body, the inlet and outlet ends of the stop valve with a discharge function are respectively connected to pressure gauges, and compressed air is provided to the outside through a joint.

The utility model relates to the field of boiler equipment, in particular to a micro-pressure phase-change electrode boiler which comprises a boiler body and a tubular heat exchanger, the interior of the boiler body is hollow, the boiler body is filled with liquid, the interior of the boiler body is in a non-flooded state, and the tubular heat exchanger is arranged in the boiler body. The liquid level of liquid in the boiler body divides the interior of the boiler body into a steam space and a water space, the steam space is located above the liquid space, the tubular heat exchanger is installed in the steam space, and the tubular heat exchanger is connected with an outer net to be heated. The boiler has the effects of reducing the occupied area of the boiler and improving the heat exchange efficiency.

The invention belongs to the technical field of phase equilibrium measurement, and discloses a high-temperature and high-pressure phase equilibrium corrosion evaluation device and method. Comprising a gas booster pump, a gas storage tank, a reaction kettle, a sampling container and a detection pipe. Through the device and the method, phase equilibrium simulation experiment analysis and evaluation under high temperature and high pressure can be carried out, and the device and the method are used for carrying out research on different corrosion relationships, deeply understanding research on corrosion mechanisms, guiding independent research and development and performance evaluation of medicaments and optimizing optimal concentration of medicaments added in a mine field; the corrosion evaluation precision is improved, the ion change condition in the experiment process is determined, the underground corrosion environment is simulated, and the corrosion condition of each underground key component is accurately reflected.

The invention relates to the technical field of semiconductor packaging, in particular to a crimping quality real-time detection method and system.The method comprises the steps that pressure sensor data and displacement encoder data in the crimping process are collected in real time, and a pressure-displacement curve is generated; characteristic parameters of the pressure-displacement curve are extracted, wherein the characteristic parameters comprise the pressure fluctuation amplitude of the contact stage, the local slope change value of the main pressure interval and the high-frequency oscillation frequency of the pressure maintaining stage; synchronously normalizing the pressure fluctuation amplitude, the local slope change value and the high-frequency oscillation frequency into dimensionless risk values; and respectively carrying out weighted fusion on the risk values through respective weight coefficients, calculating a comprehensive quality score, and judging the crimping quality according to the comprehensive quality score. According to the method, the three-stage characteristic parameters are extracted through the pressure-displacement curve, a traditional single-point threshold value method is replaced, transient abnormity is accurately captured, rapid response can be achieved, and the hysteresis problem of crimping quality offline analysis is solved.

The utility model discloses a large grate-fired pressure phase-change heat exchange hot water boiler which comprises a base, a first hydraulic push rod is arranged on the base, a second hydraulic push rod is arranged below the first hydraulic push rod, a third hydraulic push rod is arranged below the second hydraulic push rod, a fourth hydraulic push rod is arranged below the third hydraulic push rod, and a third hydraulic push rod is arranged below the fourth hydraulic push rod. A metal blade is arranged on the base, a motor is fixedly connected to the metal blade, a bearing is fixedly connected to the metal blade, a pressure reduction piece is arranged on the base, and a fire grate is arranged in the pressure reduction piece. By means of the structure, the motor drives the metal blades to rotate through the bearing, so that the air inlet amount is adjusted, the first hydraulic push rod, the second hydraulic push rod and the third hydraulic push rod push the fourth connecting block to drive the pressure reducing piece and the second circular ring to move, and the second circular ring drives the fire grate to move to achieve fuel layering; and insufficient combustion caused by accumulation of the combustion layers is prevented.

The application discloses a papermaking equipment-oriented Internet of Things fault evolution analysis and maintenance decision method, relates to the technical field of monitoring and analysis, and comprises the following steps: acquiring pressure pulsation data collected by a pressure sensor arranged at the back of a suction box panel and the inlet of a vacuum pump; acquiring acoustic emission data collected by an acoustic emission sensor arranged synchronously with the pressure pulsation data; calculating ultrasonic intensity data according to the acoustic emission data; when the ultrasonic intensity data exceeds a preset intensity threshold, performing phase analysis on the pressure pulsation data to obtain pressure phase angle data; matching the pressure phase angle data with a pre-stored cavitation source phase feature library, if the pressure phase angle data falls within a first predetermined phase angle range, generating first maintenance instruction data, and if the pressure phase angle data falls within a second predetermined phase angle range, generating cleaning instruction data and performing a cleaning operation on the suction box panel. The application has the effect of improving fault evolution analysis efficiency.

The invention is applicable to the technical field of perovskite luminescent materials, and provides a method for intercepting a high-pressure phase of a Cd-based metal halide, which comprises the following steps of: pre-pressing a stainless steel metal sheet by using a diamond anvil cell press, and drilling a hole groove at an indentation to serve as a pressure cavity; cd-based metal halide crystals are placed in a pressure cavity, mineral oil is added to serve as a pressure transmitting medium, pressurization is conducted, ruby serves as a calibration pressure substance in the pressurization process, the chemical general formula of the Cd-based metal halide crystals is [BPy] 2CdX4, [BPy] 2 is C18H28N2, and X is selected from I, Br and Cl; the performance of the Cd-based metal halide crystal is regulated and controlled through the pressure, after the pressure is slowly released, the emission phenomenon different from the initial emission phenomenon is shown, and the high-pressure phase of the Cd-based metal halide is successfully intercepted. On the basis of pressure regulation, a part of amorphous phase can be reserved, meanwhile, on the premise that other components are not introduced, the inter-atomic distance and interaction in the material are precisely regulated, the band gap of the material is changed, and then the high-pressure phase of the Cd-based metal halide is successfully intercepted.

The invention discloses a closed alternating pressure polishing control method and system for a fine structure part, and the method comprises the steps: placing a to-be-machined part in a machining cavity to construct a closed loop, and filling the to-be-machined part with a polishing solution to form a constant-volume and pressure-maintaining machining environment; the polishing solution is driven to circularly flow in the closed loop, alternating pressure is applied, the polishing solution is rigidized at the high-pressure phase of the alternating pressure, selective material removal is conducted on the microcosmic convex peak, and the polishing solution is kept in the flexible fluid state at the low-pressure phase or when the polishing solution flows through the microcosmic concave valley so that chip removal can be achieved; acquiring current temperature data of the polishing solution and current output resistance moment data of a power source for driving the polishing solution to circulate in real time; and if the descent slope of the current output resistance moment data reaches a preset threshold value, generating a compensation instruction to increase the switching frequency of the alternating pressure or increase the amplitude of the alternating pressure. According to the method, precise targeted polishing is achieved, and the consistency of the removal rate in long-period machining is maintained.

An applicator for and method of applying a material, and a piston assembly for the applicator. A piston assembly of the applicator is movably engaged within a housing to form a reservoir that is expandable and contractable to, respectively, draw into and push out from the reservoir the material via an opening during, respectively, suction and pressure phases of the applicator. The piston assembly includes an outer seal to prevent ingress of fluid towards the reservoir from an outer side of the piston assembly during the suction phase and an inner seal disposed between the outer seal and the reservoir to prevent egress of material out of the reservoir into a cavity formed between the housing and the inner and outer seals, during the pressure phase. The outer seal moves freely as the applicator is moved to the pressure phase to open the cavity for pressure equalization to prevent suction.

The invention relates to the field of metal pipe forming, in particular to a pipe hydroforming two-stage pressurization shaping device and method. The problems of large pressure value output capacity and large pressure fluctuation in a small pressure stage of existing supercharging equipment and method are solved. The device provided by the invention can meet the requirements of large pressure output capacity and small pressure value accurate control, and meets the requirement of pipe hydroforming. Only by manufacturing the two-stage pressurizing structure on the punch, the low-cost pressurizer with the small pressure output capacity can meet the requirement for large pressure in the shaping stage of the last stage of pipe hydroforming, and high-cost pressurizing equipment with the large output capacity is not needed. The device and the method are simple in structure and easy to implement.

The invention relates to the technical field of thermal analysis, in particular to a universal differential scanning calorimeter device, a universal differential scanning calorimeter system and a use method of the universal differential scanning calorimeter system. The problem that an existing DSC cannot carry out high-pressure DSC testing is solved, the DSC has high temperature precision, aiming at the characteristic that gas or liquid can be injected into the high-pressure crucible sample chamber in the high-pressure crucible in real time, the injection pump is used for controlling the high-pressure piston, the pressure of the gas or the liquid in the high-pressure crucible is controlled in real time, and the high-pressure crucible sample chamber is controlled in real time. DSC tests of thermal processes such as high-pressure phase equilibrium, adsorption and high-pressure phase change are realized, and instrument functions are expanded.

According to the condensate gas reservoir fluid component monitoring device and the fluid phase state change characterization method provided by the embodiment of the invention, the component monitoring experiment and the material balance calculation are combined to simulate the component change condition of the retained fluid when the pressure of the reservoir is reduced to different pressure stages; pVT sim phase analysis software is combined to carry out state equation simulation calculation to obtain P-T phase diagrams of all pressure stages, the P-T phase diagrams are integrated to obtain a dynamic phase diagram of the depletion development process of the condensate gas reservoir, and the phase change condition of reservoir fluid in the depletion development process of the condensate gas reservoir can be more accurately represented according to the dynamic phase diagram. By means of the method, the phase state change condition of the fluid in the condensate gas reservoir development process can be predicted, and the method has important guiding significance on reasonable design and strategy adjustment of a development scheme.

The utility model discloses a frame structure and a smart watch, and the frame structure comprises a middle frame, a first air pressure detection assembly and a second air pressure detection assembly, and the first air pressure detection assembly and the second air pressure detection assembly are both installed on the middle frame and are arranged in a diagonal manner. The air inlet direction of the first air pressure detection assembly is opposite to the air inlet direction of the second air pressure detection assembly, so that the first air pressure detection assembly and the second air pressure detection assembly form an air pressure phase difference of 180 degrees. According to the method, the independent detection assembly is additionally arranged, the phase difference is formed between the two detection assemblies through position arrangement, finally, the wind blowing scene is accurately recognized through the phase difference, and then floor positioning is prevented from drifting through filtering.

The present application relates to the technical field of offshore platform anchoring, and discloses a wave energy device anti-typhoon anchoring system, which comprises a wave energy device floating body structure, a constant-pressure phase change energy storage device, an anchor chain and an anchor. The constant-pressure phase change energy storage device is arranged in the wave energy device floating body structure, and comprises a shell. A partition plate is arranged in the shell, and divides the shell into a first chamber and a second chamber. A compression spring tension rod component is arranged in the first chamber and extends at least partially to the outside of the shell. An air bag type constant-pressure component is arranged in the second chamber, and the compression spring tension rod component can act on the air bag type constant-pressure component. One end of the anchor chain is connected to the part of the compression spring tension rod component extending to the outside of the shell. The anchor is connected to the end of the anchor chain away from the compression spring tension rod component. The present application can solve the problem of anti-typhoon of the anchoring system in shallow water, and can ensure the safe and long-term use of the key components of the anchoring system, thereby improving the service life and safety.

The application relates to the technical field of temperature-pressure phase diagram modeling, and discloses a temperature-pressure phase diagram modeling method based on a Grover model, which comprises the following steps: S1: obtaining the thermal expansion coefficient, volume and isothermal bulk modulus thermodynamic data of a rare earth tantalate system under different temperature and pressure conditions; S2: respectively correcting the molar volume and the isothermal compressibility under standard atmospheric pressure, reducing the influence of excessive sensitivity of the heat capacity on the coupling relationship between the temperature and the pressure, so as to realize the correction of the Grover model; and S3: obtaining the Gibbs free energy change through the corrected Grover model state equation, and linearly superimposing the Gibbs free energy change and the Gibbs free energy under standard atmospheric pressure given by a thermodynamic database to obtain a temperature-pressure phase diagram model. The application can ensure the accuracy of the obtained Gibbs free energy, thereby ensuring stable modeling and ensuring the reliability of the phase diagram.

In one aspect, the disclosure relates to nanocrystal solids including a metastable high-pressure phase that is kinetically trapped at ambient conditions and a second phase that is thermodynamically stable at ambient conditions, methods of making the same, and articles including the same. In one aspect, the methods are generalizable across a wide range of materials. In another aspect, the nanocrystal solids may form superconducting or semiconducting materials useful in computing and other fields. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.

The heat pump 100 includes a sealed housing 104 divided into a main housing volume 106 and one or more secondary volumes 120. The heat pump 100 includes a shaft 108. The heat pump includes a displacer 102 coupled to the shaft 108 and reciprocating to create a pressure gain between a high-pressure phase and a low-pressure phase. The heat pump includes one or more displacer rings 114, each made from a material having a thermal property less than a threshold value. The heat pump 100 includes an insert 116 configured to form a perimeter of the main housing volume 106, the insert 116 being made from a material having a thermal property less than a threshold value. The heat pump 100 includes one or more bushings 124, each separating the main housing volume 106 from the one or more secondary volumes 120. The heat pump 100 includes one or more gas bearings 122 configured to prevent contact between the shaft 108 and the sealed housing 104 .

A heat pump includes a sealed housing divided into a primary housing volume and one or more secondary volumes. The heat pump includes a shaft. The heat pump includes a displacer coupled to the shaft and oscillating to produce a pressure gain between a high pressure phase and a low pressure phase. The heat pump includes one or more displacer rings, wherein the displacer rings are made of a material having thermal properties below a threshold. The heat pump includes an insert, where the insert is configured to form a perimeter of the main shell volume, where the insert is made of a material having thermal properties below the threshold. The heat pump includes one or more liners, wherein the one or more liners separate the primary shell volume from the one or more secondary volumes. The heat pump includes one or more gas bearings configured to prevent contact between the shaft and the sealed housing.

A fluid pump includes a cam plate that defines an inner cam surface with an eccentric portion and a narrow portion. A core rotates within the inner cam surface and has a piston cavity connected to an inlet port and an outlet port. A piston member is operatively received within the piston cavity to define a suction phase within the eccentric portion and a pressure phase within the narrow portion. The piston member is pushed outward by the rotation of the core. During the suction phase, the piston member moves away from the piston cavity to define a flow cavity that draws fluid from the inlet port. During the pressure phase, the piston member is pushed by the narrow portion within the flow cavity to force fluid from the flow cavity toward the outlet port.