Industrial Technology Research Institute

Chung-Ping Chiang

Cheng-Chung Yen

Chan-Hua Feng

Jack Huang

Yung-Lo Chow

Chun-Han Chen

Jiing-Fu Chen

Yuh-Ming Hwang

Pai-Hsiang Hsu

Yun-Jui Chung

Chang-Dau Yan

Jiing Fu Chen

Ching-Fu Chen

Ching-Huei Wu

Chung-Che Liu

Ching-Huan Tseng

Caesar Chen

Teng-Yuan Wu

Chung-Biau Tsay

Chwan-Cherng Wang

Ching-Wen Liu

Yen-Chieh Wang

Chih-Ming Liang

A mechanism modulates a fluid flow in a diffuser flow path of a compressor diffuser, including: a shroud disposed on the diffuser flow path and having a cam and a driving wheel fixed base; a diffuser vane having a diffuser guide vane disposed in the diffuser flow path and a diffuser vane shaft fixedly disposed on the diffuser vane that penetrates from the diffuser flow path through the shroud; a driving ring sleeved on the cam and having a moving bar; a sliding block having one end connected with one end the diffuser vane shaft that penetrates through the shroud, and the other end sleeved on a sliding groove formed on the moving bar; a driving wheel disposed in the driving wheel fixed base and having a driving shaft connected to an actuator outside of the compressor; and a driving cable connected to the driving wheel and the driving ring.

Mechanism for modulating diffuser vane of diffuser

A system and method for monitoring and controlling oil return to a compressor, characterized by monitoring and controlling oil level, oil temperature, and compressor outlet pressure, so as to determine whether the oil level is lower than a predetermined level threshold, whether the temperature in the lubricating oil box is lower than a predetermined temperature threshold, and whether the compressor outlet pressure exceeds a predetermined pressure threshold, so as to control the flow of lubricating oil returned to the oil box by controlling the valve opening of the oil return valve according to a non-segmentation principle or a segmentation principle, ensure sufficient lubricating oil in the oil box, and enhance efficiency of the system.

System and method for monitoring and controlling oil return to compressor

A magnetic-gas bearing disposed in a compressor is provided. The magnetic-gas bearing includes an axis, multiple magnetic elements, multiple magnetic coils and a static pressure gas restrictor. The magnetic elements encircle the axis, and each magnetic element has two ends wound around by the magnetic coils respectively, such that the two ends of each magnetic element form a first magnetic pole and a second magnetic pole respectively. The static pressure gas restrictor encircles the axis and has a jet opening, such that the gas pass through the jet opening to form a gas-film between the static pressure gas restrictor and the axis. Besides, an oil-free centrifugal blade compressor including the magnetic-gas bearing mentioned above is also provided.

Oil-free centrifugal blade compressor and magnetic-gas bearing thereof

A method for predicting surge in a compressor is provided, which is applicable to a cooling apparatus equipped with a centrifugal compressor. A set of highest outlet pressure values is obtained by a performance test performed on the centrifugal compressor. A coolant flow rate value and an opening percentage value of inlet guide vanes of the centrifugal compressor are measured. An outlet pressure value of the centrifugal compressor is calculated with an equation using the measured coolant flow rate value and the measured opening percentage value. The outlet pressure value is compared with one of the highest outlet pressure values corresponding to the measured opening percentage value, and if the outlet pressure value is larger than or equal to the highest corresponding outlet pressure value, it confirms imminent surge in the centrifugal compressor, so as to provide a basis of preparation for surge elimination.

Method for predicting surge in compressor

A centrifugal impeller employed in a centrifugal machine, includes a main body, the main body generally being conical and defining a shaft bore in a center portion thereof; and a plurality of blade groups evenly arranged surrounding the shaft bore in sequence, each of the blade groups having a plurality of blades wherein neighboring blades having an interval angle, and the number and corresponding interval angles of the blades of different blade groups are identical. The present impeller structure can be employed to distribute the concentrated energy of the discrete tones noise of the blades, which is generated by the high-speed rotation impeller, and further to reduce the operating tones noise.

Centrifugal impeller

A rotor mechanism of a centrifugal compressor connectable to a power output device and configured to block leakage of lubricants and to recycle lubricants to an oil sump is provided, which includes a rotary shaft with a rolling bearing and a screw nut, a bearing housing for receiving the rolling bearing, and a bearing plate connected to the bearing housing. The screw nut has a surface provided with an oil throw seal, and the bearing housing. As the bearing plate is provided with an oil channel in contact with the oil-returning hole and either one of the bearing housing and the bearing plate is provided with a first labyrinth seal in contact with the screw nut, lubricants leaking out of the rolling bearing is allowed to go to the oil sump via the oil channel and oil-returning hole. The oil slinger thus blocks the lubricants from leaking out of the first labyrinth seal.

Rotor mechanism of centrifugal compressor

A flow passage structure can be disposed in a multi-stage centrifugal refrigerant compressor having a deswirl vane and a return channel bend. The flow passage structure includes a two-way flow passage having a first outlet and a second outlet, for diverging externally injected refrigerant; a first side discharge flow passage connected to the first outlet of the two-way flow passage and having a first side outlet disposed below the deswirl vane, such that the diverged refrigerant can be discharged into the return channel bend and uniformly mixed with the refrigerant in the return channel bend; and a second side discharge flow passage connected to the second outlet of the two-way flow passage and having a second side outlet disposed below the deswirl, vane, such that the diverged refrigerant can be injected into the return channel bend and uniformly mixed with the refrigerant in the return channel bend.

Flow passage structure for refrigerant compressor

An auxiliary-bicycle torsion sensing and large gear plate minimization apparatus, arranged in transmission apparatus of an auxiliary-bicycle, includes a sun gear, a unidirectional device, a planet gear set and a sensing device. The sun gear of planet gear set is connected to the crank axle of auxiliary-bicycle and driven directly with it. The stepping power of crank axle is output to the large gear plate of auxiliary-bicycle through the transmission of sun gear, planet gear and unidirectional device. Also, one side of swing arm, used for pivotally arranging sun gear and planet gear, is arranged with the sensing device. When crank axle is rotated by the stepping force of rider, the swing arm will generate a rotation torsion, and sensing device senses the torsion value to control the power output of driving motor. The present invention has the characteristics of simple structure, low manufacture cost, more accurate sensitivity, and further instant changeable rotation ratio between crank axle and large gear plate to meet the object of broader application, such as the outlook beautification due to the minimization of large gear plate.

Auxiliary-bicycle torsion sensing and large gear plate minimization apparatus

A free wheel rotary body structure for use in a bicycle is disclosed. It includes a free wheel kernel having a pair of axially extending ratchet pawl bearings at diametrically opposite positions relative to each other and a pair of ring grooves. The rotary body structure also includes first and second sets of one-way clutches. Each of the one-way clutches includes a c-spring and a pair of ratchet pawls. The pair of c-springs are received in the pair of ring grooves, respectively, of the free wheel kernel, and the pairs of ratchet pawls are received in the diametrically opposing pawl bearings, respectively, of the free wheel kernel. The pair of ratchet pawls in the first set of one-way clutch are of different shapes and dimensions from the pair of ratchet pawls in the second set of one-way clutch, so as to form phase difference when one of each pair of the ratchet pawls is engaged with the ratchet teeth groove of the free wheel housing.

Free wheel rotary body structure of a bicycle

The present invention relates to a cushion mechanism for a brake of a bicycle, comprising a brake block, an elastomer, a sleeve, and an adjustable nut. The brake block includes an engaging end which extends through the elastomer and the sleeve and is engaged with the adjustable nut. Then the cushion mechanism is installed on a brake caliper. The cushion mechanism of the brake is constructed to prevent a sudden lock of the wheel upon an emergency brake and such an effect is achieved by mounting an elastomer between the brake block and the brake caliper. The elastomer is preset with pressure while being assembled. The preset pressure enables the elastomer to absorb a less force caused by braking when under normal braking operation; and enables the same elastomer to absorb excess force when the braking force exceeds the normal range. Thus, the braking force will not reduce, and the safety for the rider is secured.

Cushion mechanism for a brake of a bicycle

A sprocket trimming method for a multi-stage sprocket assembly is disclosed which includes the steps of: (1) aligning the two sprockets at a gear shift position where a chain is escaping from one sprocket and engaging with another sprocket and is being tilted at a tilting angle; (2) using a computer aided design simulation to simulate how the gear shift operation is taking place and thus identify the portion of the sprocket tooth that will be overlapped and/or interfered with the chain when the chain is moved from an escaping sprocket tooth to an engaging sprocket tooth; and (3) trimming the overlapping and interference portion of the sprocket teeth to a depth according to the following equation: ##EQU1## wherein: D is the depth of the overlapping and interference portion of the sprocket teeth to be trimmed, w is the pitch width of the chain, Lc is the pitch length of the chain, .theta. is the tilting angle of the chain at gear shift position, Ts is the thickness of the sprocket of a smaller diameter, Sg is the distance between the two sprockets. The trimming allows the gear shift operation to be performed without the chain interfering with the sprocket teeth located between the escaping and engaging teeth.

Sprocket trimming method for the multi-stage sprocket assembly

An improved rear derailleur for changing the gear ratio of a bicycle is disclosed. It includes a fixed member, a movable member, a parallelogram mechanism connecting the fixed member with the movable member, and a cable adjusting screw which is screwed to a screw socket fixed on the fixed member. The cable adjusting screw is connected to a first end of a cable, wherein the cable has a second end fixed to a movable member. The cam member comprises a guiding surface for guiding the cable between the cable adjusting screw and the movable member. The guiding surface of the cam member is structured substantially coinciding a portion of a fictitious circle centered at a rotating pin which connects an outer linkage of the parallelogram with a second end of the fixed member. Furthermore, the cable adjusting screw is positioned in such a manner that its extension is always substantially tangential to the guiding surface of the cam member, so as to allow the cable to be pulled in a direction substantially coincident with the axial extension of the cable adjusting screw.

Rear derailleur for use in bicycles

A bicycle speed changing apparatus comprises a support means, a cable winding means, a fixation plate, a high gear shifting means, a retaining mechanism, a low gear shifting means, and a transmission mechanism. The support means is fastened with the handlebar of a bicycle. The low gear shifting means has a low turning rod connected with the support means by a first retrieving spring and provided with a first braking portion. The cable winding means is connected with the support means by a torsion spring. The fixation plate is provided with a second braking portion. The high gear shifting means has a high turning rod fastened with the fixation plate by a second retrieving spring. The retaining mechanism has a shaft fastened pivotally with the support means and the fixation plate. The shaft is provided with an engaging means and a first cam, a first ratchet portion and a third braking portion. The shaft is connected with the support means by a first pressing spring so as to cause the first cam, the first ratchet portion and the third braking portion to become engaged with the first braking portion, the first engaging portion, and the third cam of the high gear shifting means at the time when the first cam, the first ratchet portion and the third braking portion are set at a neutral position. The transmission mechanism has a shaft fastened pivotally with the high turning rod and provided with a braking member, a second cam and a second ratchet portion. When at a neutral position, the second cam is engaged with the second braking portion. When the high turning rod is actuated, the second ratchet portion is engaged with the second engaging portion.

Bicycle speed changing apparatus

The present invention relates to a bicycle speed change lever apparatus which is mounted near the handlebar of a bicycle. A lever apparatus is used for pushing a ratchet member, allowing the ratchet member to produce a positive or negative rotation, which further drives a cable-pulling member, thus allowing the cable to be tightened or relaxed by the cable-pulling member to accomplish an in or back shift. A position maintaining mechanism is also provided for effectuating the shift change, and the cable is allowed to maintain a certain amount of tension. The speed change lever apparatus eases the shifting operation and makes the in shift or back shift more precisely controlled.

Speed change lever apparatus for use in bicycles

A speed indicator for bicycles for indicating the shifting action of the bicycle and a speed sign at each state of shift includes a driving wheel driven by a takeup reel of a shifting device, a resilient strip driven by the driving wheel, and a track along which the resilient strip may displace. When the resilient strip displaces along the track, a shift sign pre-formed on the resilient strip may be shown through an indicating element provided on the track. The resilient strip may be adapted for use in vertically or horizontally oriented tracks of any construction, and their assembly is easy. The driving wheel further includes a compensation mechanism for ensuring clear indication of the indicated sign on the resilient strip.

Growing community of inventors

Hsinchu, Taiwan

Chung-Ping Chiang