Abstract: A fixed chain engine braking device includes a brake box, a driving mechanism and a braking mechanism. One upright blind hole and one horizontal blind hole are placed in the brake box, and the upright blind hole intersects the horizontal blind hole orthogonally. The driving mechanism includes a rolling ball and/or a driving piston placed in the horizontal blind hole, the braking mechanism includes a braking plunger placed in the upright blind hole. A fluid passage is placed in the brake box, and the fluid passage is communicated with the entry of the horizontal blind hole.

Abstract: Scroll type fluid machinery, in which two stationary scrolls (2A, 2B) are fixed onto a housing (1), and form volume changing mechanisms (50A, 50B) with matching orbiting scrolls (3A, 3B). Three orbiting units (40) are located between the two volume changing mechanisms. Each orbiting unit comprises a rotating member (10) and a thrust-cancelling shaft (20). Assembly sets of the thrust-canceling shaft consist of turning elements and a connector, which in turn connects with orbiting scrolls through threads. There exists only circumferential constraint but no axial constraint between the connector and the turning element. Rotating turning element will rotate the connector, and thus move the two orbiting scrolls closer or farther through the threads on the connector. The rotating member of this invention further provides a larger space to the supporting bearings (14A, 14B) of the thrust-canceling shaft, and also eases component manufacturing, machinery's assembly and adjustment, and bearings' cooling.

Abstract: A fixed chain engine braking device includes a brake box, a driving mechanism and a braking mechanism. One upright blind hole and one horizontal blind hole are placed in the brake box, and the upright blind hole intersects the horizontal blind hole orthogonally. The driving mechanism includes a rolling ball and/or a driving piston placed in the horizontal blind hole, the braking mechanism includes a braking plunger placed in the upright blind hole. A fluid passage is placed in the brake box, and the fluid passage is communicated with the entry of the horizontal blind hole.

Abstract: Scroll type fluid machinery, in which two stationary scrolls (2A, 2B) are fixed onto a housing (1), and form volume changing mechanisms (50A, 50B) with matching orbiting scrolls (3A, 3B). Three orbiting units (40) are located between the two volume changing mechanisms. Each orbiting unit comprises a rotating member (10) and a thrust-cancelling shaft (20). Assembly sets of the thrust-canceling shaft consist of turning elements and a connector, which in turn connects with orbiting scrolls through threads. There exists only circumferential constraint but no axial constraint between the connector and the turning element. Rotating turning element will rotate the connector, and thus move the two orbiting scrolls closer or farther through the threads on the connector. The rotating member of this invention further provides a larger space to the supporting bearings (14A, 14B) of the thrust-canceling shaft, and also eases component manufacturing, machinery's assembly and adjustment, and bearings' cooling.

Abstract: A scroll type fluid machinery includes first and second fluid volume changing mechanisms. The first fluid volume changing mechanism includes a first stationary scroll and a first orbiting scroll, and the first orbiting scroll is associated with the first stationary scroll so that the first orbiting scroll is able to orbit with respect to the first stationary scroll. The second fluid volume changing mechanism includes a second stationary scroll and a second orbiting scroll, and the second orbiting scroll is associated with the second stationary scroll so that the second orbiting scroll is able to orbit with respect to the second stationary scroll. The scroll type fluid machinery further includes a plurality of orbiting units. Each of the orbiting units includes a rotating member that is able to rotate relative to the first and second stationary scrolls, and a thrust-canceling shaft connected to the first orbiting scroll and to the second orbiting scroll.

Abstract: A scroll type fluid machinery includes first and second fluid volume changing mechanisms. The first fluid volume changing mechanism includes a first stationary scroll and a first orbiting scroll, and the first orbiting scroll is associated with the first stationary scroll so that the first orbiting scroll is able to orbit with respect to the first stationary scroll. The second fluid volume changing mechanism includes a second stationary scroll and a second orbiting scroll, and the second orbiting scroll is associated with the second stationary scroll so that the second orbiting scroll is able to orbit with respect to the second stationary scroll. The scroll type fluid machinery further includes a plurality of orbiting units. Each of the orbiting units includes a rotating member that is able to rotate relative to the first and second stationary scrolls, and a thrust-canceling shaft connected to the first orbiting scroll and to the second orbiting scroll.

Abstract: A scroll type of fluid machinery, in which two housings are fixed to each other, two stationary scrolls are fixed to the two housings, two orbiting scrolls are assembled together with the stationary scrolls to form volume changing mechanisms, three orbiting units are located between the two orbiting scrolls and are arranged to form an anti-self-rotation mechanism for the orbiting scrolls. Each of the three orbiting units comprises a rotating member rotatably supported on the two housings and a thrust-canceling shaft rotatably supported in an eccentric through-hole in the rotating member. Each thrust-canceling shaft is fixed between the two orbiting scrolls. When any one or more of the aforementioned rotating members are driven, the two orbiting scrolls orbit with respect to the stationary scrolls to cause the fluid volumes change. The thrust forces exerted on the two orbiting scrolls cancel one another through the thrust-canceling shafts.