Embodiments of systems and methods disclosed provide a hydraulic fracturing unit that includes a reciprocating plunger pump configured to pump a fracturing fluid and a powertrain configured to power the reciprocating plunger pump. The powertrain includes a prime mover and a drivetrain, the prime mover including a gas turbine engine. The hydraulic fracturing unit also includes auxiliary equipment configured to support operation of the hydraulic fracturing unit including the reciprocating plunger pump and the powertrain. A power system is configured to power the auxiliary equipment. The power system includes a power source and a power network. The power source is configured to generate power for the auxiliary equipment. The power network is coupled to the power source and the auxiliary equipment, and configured to deliver the power generated by the power source to the auxiliary equipment. Associated systems including a plurality of hydraulic fracturing units are also provided.

Embodiments of systems and methods disclosed provide a hydraulic fracturing unit that includes a reciprocating plunger pump configured to pump a fracturing fluid and a powertrain configured to power the reciprocating plunger pump. The powertrain includes a prime mover and a drivetrain, the prime mover including a gas turbine engine. The hydraulic fracturing unit also includes auxiliary equipment configured to support operation of the hydraulic fracturing unit including the reciprocating plunger pump and the powertrain. A power system is configured to power the auxiliary equipment. The power system includes a power source and a power network. The power source is configured to generate power for the auxiliary equipment. The power network is coupled to the power source and the auxiliary equipment, and configured to deliver the power generated by the power source to the auxiliary equipment. Associated systems including a plurality of hydraulic fracturing units are also provided.

A hydraulic block for a hydraulic power unit of a hydraulic, slipped-controlled power vehicle braking system. A power piston of an electromechanical power brake pressure generator in a power cylinder borehole of the hydraulic block is guided radially in the power cylinder borehole with the aid of a guide bushing.

An apparatus includes a base, including two motors and a mechanical coupling mechanism, and a cartridge shaped to define two stators and respective pairs of ports in fluidic communication with the stators. The cartridge is removably insertable into the base and includes two rotors disposed, respectively, within the stators. The mechanical coupling mechanism is configured to mechanically couple the rotors to the motors, respectively, such that, following insertion of the cartridge into the base, the motors rotate the rotors, thereby pumping fluid through the pairs of ports. Other embodiments are also described.

A fracturing apparatus is provided. The fracturing apparatus includes: a plunger pump including a hydraulic end and a power end, the power end having a power end oil outlet and at least one power end oil inlet that are coupled to each other; and a power end lubricating system, including: a lubricating oil tank configured for defining an accommodation space, at least one lubrication pump having a lubrication pump oil inlet and a lubrication pump oil outlet that are coupled to each other, and at least one lubrication motor configured for providing power for the at least one lubrication pump, wherein at least a portion of at least one of the lubrication motor and the lubrication pump is located in the accommodation space.

A skid for supporting a reciprocating pump assembly, the reciprocating pump assembly including a power end frame assembly having a pair of end plate segments and a plurality of middle plate segments disposed between the end plate segments. The end plate segments each have at least a pair of feet and the middle plate segments each having at least one foot. The skid includes a base and a plurality of pads extending from the base. At least a portion of the plurality of pads correspond to the end plate segment feet and at least another portion of the plurality of pads correspond to the at least one foot of each middle plate segment.

A spherical puffing pump for an ice cream machine and an air inlet device thereof. The spherical puffing pump includes a spherical pump body, a clamping plate and an air inlet valve. A liquid feeding hole of the spherical pump body is connected to a milk slurry tank to feed milk slurry. The air inlet valve is connected to a channel of the liquid feeding hole to introduce air. A liquid discharging hole is connected to a liquid inlet of a refrigerating cylinder. A pump seat is fixed on the ice cream machine. An end portion of the pump seat protrudes from an inner wall of the tank. A cylinder of the spherical pump body is connected to the end portion through the clamping plate. A main shaft of the spherical pump body is connected to a motor shaft through a connecting shaft for power transmission.

A fluid pump comprises an electric motor configured to provide a unidirectional rotational output. The fluid pump further comprises a screw drive coupled to the electric motor. The screw drive is configured to convert the unidirectional rotational output of the electric motor into reciprocating motion to linearly reciprocate a piston coupled to the screw drive.

A fluid pump comprises an electric motor configured to provide a unidirectional rotational output. The fluid pump further comprises a screw drive coupled to the electric motor. The screw drive is configured to convert the unidirectional rotational output of the electric motor into reciprocating motion to linearly reciprocate a piston coupled to the screw drive.

Disclosed is a mechanical impulse motor for producing kinetic rotational energy by driving one or more pulleys using compressed air comprising: an air compressor powered by an electric battery; two pneumatic pistons configured to receive compressed air from the air compressor; two lever arms each of which driven by one of the pneumatic pistons; two ratchets each of which driven by one of the level arms; a shaft securely connected to the two ratchets, the shaft being driven by the lever arms to rotate in a direction constrained by the two ratchets; and a pulley securely connected to the shaft.