摘要:
In a conventional blowing apparatus, vibration is increased depending upon a combination of rotor magnetic poles, the number of stator salient poles and blades of a fan. In a blowing apparatus comprising a stator having a core including a M-number of salient poles, and a rotor having permanent magnets having a P-number of magnetic poles rotatably disposed such as to be opposed to magnetic pole surfaces of the stator, the stator and the rotor, in combination, forming a motor for rotating a fan having a N-number of blades, mN≠nM or mN≠nP is satisfied. With this feature, a synergism between vibration generated by cogging torque of the motor and vibration generated by rotation of the fan is moderated, and vibration and noise are reduced.
摘要:
The present invention relates to a motor-driven assembly with a motor unit and a working machine, wherein the motor unit includes a rotatable rotor with a motor shaft to drive at least one working element. The nub of the present invention is the provision of a holding element which extends through the motor shaft and pivotably mounts the rotor. These measures ensure a space-saving mounting support of the rotor, on the one hand, and a drive of the working machine with practically no vibrations and with little noise in operation, on the other hand. The holding element may be arranged, for example, as a tie rod, between the electric motor and the cover for an electronic unit and may serve for the attachment of the construction units on a pump housing.
摘要:
A hermetic compressor including a housing, a compression mechanism disposed in the housing, a motor disposed in the housing and operatively coupled to the compression mechanism, the motor including a stator, the stator having, relative to the compression mechanism, a proximal end and a distal end, at least one fastener extending through the stator, the stator being fixed, relative to the compression mechanism, by the fastener, a motor cover disposed over the distal end of the fixed stator, a portion of the fastener extending through the cover, and a clip engaging the portion of each the fastener, the cover being retained to the fixed stator by the clip. Also methods for assembling such compressors, one of which includes the steps of providing surrounding a rotor with a stator; placing fasteners longitudinally through the stator; loosely attaching the stator and a compression mechanism with the fasteners; aligning the stator relative to the rotor, whereby an air gap therebetween is set; tightening the fasteners and fixing the stator relative to the compression mechanism after the air gap is set; aligning apertures provided in a cover with the fasteners and fitting the cover over the stator and rotor such that portions of the fasteners extend through the cover apertures, whereby the fastener portions protrude through the cover; and engaging clips onto the protruding fastener portions, whereby the cover is retained in a position between the stator and the clips.
摘要:
A motorized pump is disclosed that includes a flexible diaphragm fitting within a rigid member, a motor drive mechanism for drawing a puller member attached to the diaphragm away from the rigid member to create a space between the diaphragm and the rigid member and form a negative pressure region within that space, and an outlet communicating with the negative pressure region. In one embodiment, the pump provides a negative pressure in a single chamber which can be used to operate one or two breast shield assembles. In another embodiment, the pump is particularly adapted for double-pumping and provides two chambers which generate vacuum.
摘要:
A self-aligning double-acting simplex plunger pump comprising first and second combined plunger stuffing box and head members or blocks. A manifold is adapted to be abutted against one surface of the blocks and second spaced apart parallel surfaces of the blocks are abutted against the axial end face of a motor. Alignment means on the motor and on the blocks assure proper alignment of the blocks with respect to a piston driven by the motor which reciprocates between the blocks along a longitudinal axis.
摘要:
A damper device has a magnet and at least two yokes facing the magnet across gaps. The magnet and the two yokes jointly provide a magnetic circuit such that a magnetic flux flowing from a first magnetic pole of the magnet is divided across one of the gaps into magnetic fluxes which flow into entrance sides of the yokes and back from exit sides of the yokes across another of the gaps into a second magnetic pole of the magnet. The two yokes are mechanically connected rigidly to each other, and a spring means elastically holds the one of the gaps between the first magnetic pole and the entrance sides of the yokes. One of the magnet and the yokes is adapted to be connected to a vibratable member. When the gaps are differentially varied in length by vibration of the vibratable member, the divided magnetic fluxes are changed to generate eddy currents in the yokes and the magnetic poles.
摘要:
An air compressor includes a housing having a tube extended from the top and having a passage communicating the housing with the tube and having a tapered surface. A piston is slidably received in the chamber of the housing and is forced to move along the housing in a reciprocating action and to force the air out through the tube via the passage. The provision of the tapered surface allows the piston to smoothly move in the housing. A stop is adjustably spring-biased to block the passage. The piston has a spring blade to block an aperture to control the air into the housing.
摘要:
A fan wheel includes a main body and an axle connected to a center of the main body. The main body includes a peripheral wall provided around an axial axis thereof. A number of upper blades and lower blades are mounted to the peripheral wall. Each upper blade extends in a direction at an angle with the axial axis, while each lower blade extends in a direction substantially parallel to the axial axis. When the main body rotates, the axial blades drive air along the axial axis, and the blower blades drive air along a plane perpendicular to the axial axis.
摘要:
A compressor has a compression unit, a drive motor, a motor housing and an outer cylinder. The compression unit compresses fluid. The drive motor drives the compression unit. The motor housing surrounds the drive motor. The outer cylinder is mounted on an outer circumferential side of the motor housing for defining a cooling jacket between the outer cylinder and the motor housing for cooling the drive motor by a fluid flowing in the cooling jacket. The outer cylinder is indirectly fixed to the motor housing by press-fitting.
摘要:
A gas suction apparatus for a reciprocating compressor, including a piston having a gas flowing passage where refrigerant gas flows, being inserted in the compression space formed in a cylinder enabling linear reciprocating movement, a fixing means combined to the piston and an inertia valve inserted in the gas flowing passage of the piston movably having a moving distance restricted by the fixing means, for opening and closing the gas flowing passage moving according to the pressure difference and inertia generated by the linear reciprocating movement of the piston can minimize dead volume of a gas compression space, ease controlling of a stroke and make the suction flowing of gas smoothly by an excellent reliability of response of valve, thus to improve compression performance. The damage of the component can be also prevented by increasing structural strength, thus to improve reliability.