Abstract: A high-frequency vibrating transverse drum cutter head, and a drum cutter machine and a tunnel boring machine with such drum cutter head are disclosed.

Abstract: A high-frequency vibrating transverse drum cutter head, and a drum cutter machine and a tunnel boring machine with such drum cutter head are disclosed.

Abstract: A rotary drill and a double-layer drilling rod mechanism are disclosed. A connecting rod (2) is provided in the rotary connecting sleeve (9), and the rotary connecting sleeve (9) is connected with the double-layer drilling rod mechanism (11). An impact drilling string (25) located by a guide bearing bush (26) is arranged in the outer rotary drilling pipe (28) of the double-layer drilling rod mechanism (11); a latch (24) for connecting the connecting rod (2) is arranged at the top of the inner impact drilling string (25); and an impact head (12) connected with the impact drilling string (25) is arranged in the drilling bit connecting sleeve (29). The drilling bit (13) below the impact head (12) is connected with the drilling bit connecting sleeve (29) by a front connector (30).

Abstract: The present invention relates to an eccentric moment stepless adjustable vibrating mechanism comprising a box body.

Abstract: A direct-fired plunger hydraulic pump, comprising a combustor (1), a high-temperature heat exchanger (2), a steam chamber (3), at least one cylinder plunger mechanism (10), a steam refrigerator (15) and a control system, wherein the high-temperature heat exchanger (2) is connected with the combustor (1) through a pipe; the steam chamber (3) is a sealed container, in which a water nozzle (4) is arranged above the high-temperature heat exchanger (2); the cylinder plunger mechanism (10) is mounted above the steam chamber (3) and mainly consists of a cylinder (20) and a plunger (21); a piston of the cylinder (20) is connected with a piston of the plunger (21) through a mandril (30) with a reset mechanism; an inlet valve (22) communicated with the steam chamber (3) is provided at the bottom end of the cylinder (20), and an exhaust valve (23) is provided on a side wall of the cylinder (20); an oil outlet and an oil inlet are provided at the top end of the plunger (21); the exhaust valve (23) is connected with the s

Abstract: A hydraulic resonant breaking hammer is described that includes a hydraulic driving system, a vibration exciter, a control system, a linkage mechanism and a breaking hammer head. The hydraulic driving system includes a hydraulic motor, an electric-control hydraulic distributing valve, a hydraulic pump and an engine. The vibration exciter includes a box and at least one group of eccentric wheels. The control system includes a sensor, a microcomputer controller and the electric-control hydraulic distributing valve. The linkage mechanism includes a machine frame, a guide rail and a damper spring. The disclosure solves the problems of the existing engineering breaking devices, such as low efficiency, high noise, serious damages to the driving excavator caused by the reaction of an impact force and incapability of breaking large rocks.

Abstract: A rotary drill and a double-layer drilling rod mechanism are disclosed. The rotary drill comprises a vibration excitation mechanism (1), a rotating mechanism (3) and a flushing mechanism (10). The rotating mechanism (3) consists of a rotary box (8), a driving gear (7), a rotary gear (6) and a rotary connecting sleeve (9). The rotary gear (6) is tightly cased on the rotary connecting sleeve (9) and engaged with the driving gear (7). A connecting rod (2) is provided in the rotary connecting sleeve (9), and the rotary connecting sleeve (9) is connected with the double-layer drilling rod mechanism (11). An impact drilling string (25) located by a guide bearing bush (26) is arranged in the outer rotary drilling pipe (28) of the double-layer drilling rod mechanism (11); a latch (24) for connecting the connecting rod (2) is arranged at the top of the inner impact drilling string (25); and an impact head (12) connected with the impact drilling string (25) is arranged in the drilling bit connecting sleeve (29).

Abstract: The present invention relates to an eccentric moment stepless adjustable vibrating mechanism comprising a box body.

Abstract: The present invention discloses a hydraulic resonant breaking hammer, comprising a hydraulic driving system, a vibration exciter (2), a control system, a linkage mechanism and a breaking hammer head (3), wherein the hydraulic driving system includes a hydraulic motor (1), an electric-control hydraulic distributing valve (12), a hydraulic pump (13) and an engine (14); the vibration exciter (2) includes a box (4) and at least one group of eccentric wheels; the control system includes a sensor (16), a microcomputer controller (17) and the electric-control hydraulic distributing valve (12); the linkage mechanism includes a machine frame (7), a guide rail (9) and a damper spring (8), the machine frame (7) is installed on a fore arm (10) of an excavator, the guide rail (9) is arranged on the machine frame (7), the box (4) of the vibration exciter (2) is arranged on the guide rail (9) and forms an up-and-down sliding fit with the guide rail (9), the damper spring (8) is connected between the upper part of the box (4