Abstract: Disclosed is a method for measuring gas pressure of a close-distance seam group simultaneously, including the following steps: constructing a pressure-measuring drill hole inclined downwards; lowering a first seam piezometer tube, lowering a baffle and a polyurethane blocking material after a tube head reaching a lowermost seam; and installing a gas pressure gauge; lowering a second seam piezometer tube, lowering the baffle and the polyurethane blocking material after the tube head reaching a second layer of seam; and installing the gas pressure gauge; lowering a nth seam piezometer tube, lowering the baffle and the polyurethane blocking material after the tube head reaching a nth layer of seam; and installing the gas pressure gauge; injecting a high-water and quick-solidifying material into the drill hole; and connecting the gas pressure gauges through optical fibers, and connecting the gas pressure gauges with a ground control system.

Abstract: Disclosed is a method for measuring gas pressure of a close-distance seam group simultaneously, including the following steps: constructing a pressure-measuring drill hole inclined downwards; lowering a first seam piezometer tube, lowering a baffle and a polyurethane blocking material after a tube head reaching a lowermost seam; and installing a gas pressure gauge; lowering a second seam piezometer tube, lowering the baffle and the polyurethane blocking material after the tube head reaching a second layer of seam; and installing the gas pressure gauge; lowering a nth seam piezometer tube, lowering the baffle and the polyurethane blocking material after the tube head reaching a nth layer of seam; and installing the gas pressure gauge; injecting a high-water and quick-solidifying material into the drill hole; and connecting the gas pressure gauges through optical fibers, and connecting the gas pressure gauges with a ground control system.

Abstract: A serially-connected ball screw pair and piezoelectric actuator macro-micro driving and guiding device includes, from the bottom to the top, a sliding seat (1), a ball screw pair, a sliding table guide rail pairs, a nut seat (6), a piezoelectric actuator (7), a micro-moving table, a nut seat guide rail pairs and a sliding table (1). The axis of a ball screw is symmetric with respect to two sliding table rail pairs, a nut (3) of the ball screw pair is fixedly mounted into the nut seat (6), one end of the piezoelectric actuator (7) is fixedly connected with the nut seat (6) and the other end thereof is fixedly connected with the micro-moving table (8), the axis of the piezoelectric actuator is symmetric relative to two sliding table rail pairs, an upper surface of the micro-moving table is fixedly mounted to a lower surface of the sliding table, and two nut rail pairs are symmetric relative to the axis of the ball screw.

Abstract: The present invention discloses a device for detecting axis coplanarity of orthogonal rotary shafts having a built-in intersection, wherein a front assembly rotary body is coaxially connected on a front assembly housing, the front assembly rotary body and a rear assembly housing are fixedly connected with each other, the rear assembly rotary body is mounted in the rear assembly housing, a first three dimension movement fine tuning mechanism is mounted at an end of the rear assembly rotary body, the first three dimension movement fine tuning mechanism is connected with a standard sphere through a connecting rod, the three dimension movement fine tuning mechanisms are provided in the horizontal direction of the standard sphere and below the standard sphere in vertical direction, and two non-contact displacement sensors are mounted on said two three dimension movement fine tuning mechanisms respectively.

Abstract: A guide rail precision rotation apparatus is provided with a housing of torque motor and a bearing housing fixedly arranged on an upper surface of a base, and a bearing sleeved on an inner edge step at the upper end of bearing housing. The inner ring of bearing is sleevingly connected to an intermediate rotating body, the lower end of the body is connected to a bearing inner ring cap; a round grating is provided at an outer edge of lower end of the cap, a connecting piece is arranged on the motor, the lower end of connecting piece is fixedly connected to a rotary shaft of the motor, the connecting piece and the body are both connected to the lower end of a fine movement mechanism, and the upper end face of fine movement mechanism is fixedly connected to a rotary worktable.

Abstract: A biaxial linear-motion micro drive apparatus includes: a mounting base A on an upper surface of a Z-direction sliding base; a Z-direction micro actuator fixed within the mounting base A and connected with a Z-direction micro-motion platform connected with an X-direction sliding base; Z-direction guide rail strips arranged on the Z-direction sliding; two Z-direction guide rail blocks provided on one Z-direction guide rail strip fixedly mounted on a lower surface of the X-direction sliding base; a mounting base B provided on an upper surface of the X-direction sliding base; an X-direction micro actuator in the mounting base B and connected with an X-direction micro-motion platform connected with an XZ biaxial motion platform; two X-direction guide rail strips arranged on the upper surface of the X-direction sliding base; two X-direction guide rail blocks provided on each X-direction guide rail strip mounted on a lower surface of the XZ biaxial motion platform.

Abstract: Disclosed is an operating position changeable loading apparatus with multi-axis joint movement used on machining center. The apparatus consists of a load-receiving test piece and a load-exerting component. Moving the load-exerting component and the load-receiving test piece to a preset loading position according to a multi-axis joint movement, with the displacement value measured by displacement sensors and the amount of simulated load measured by a force sensor of the loaded-exerting component, a stiffness of the load-exertion position under a simulated load can be derived. Changing the load-exertion position, repeating in sequence the previous steps, a stiffness distribution under the simulated load can be derived.

Abstract: A macro-micro actuated distended guide rail precision rotation apparatus, having a housing of a torque motor and a bearing housing, both fixedly arranged on an upper surface of a base, and a bearing sleeved on the bearing housing. The inner ring of the bearing sleevingly connected to an intermediate rotating body connected to a bearing inner ring cap. A grating is provided at a lower end of the bearing inner ring cap. A connecting piece is arranged on the upper surface of the housing of the torque motor. The lower end of the connecting piece is fixedly connected to a rotary shaft of the torque motor. The connecting piece and the intermediate rotating body are both connected to the lower end of a fine movement mechanism fixedly connected to a rotary worktable. The rotation apparatus allows for highly precise macro-and-micro linked control, and for rotation control of great rotation range.

Abstract: The present invention discloses a device for detecting axis coplanarity of orthogonal rotary shafts having a built-in intersection, wherein a front assembly rotary body is coaxially connected on a front assembly housing, the front assembly rotary body and a rear assembly housing are fixedly connected with each other, the rear assembly rotary body is mounted in the rear assembly housing, a first three dimension movement fine tuning mechanism is mounted at an end of the rear assembly rotary body, the first three dimension movement fine tuning mechanism is connected with a standard sphere through a connecting rod, the three dimension movement fine tuning mechanisms are provided in the horizontal direction of the standard sphere and below the standard sphere in vertical direction, and two non-contact displacement sensors are mounted on said two three dimension movement fine tuning mechanisms respectively.

Abstract: A biaxial linear-motion micro drive apparatus includes: a mounting base A on an upper surface of a Z-direction sliding base; a Z-direction micro actuator fixed within the mounting base A and connected with a Z-direction micro-motion platform connected with an X-direction sliding base; Z-direction guide rail strips arranged on the Z-direction sliding; two Z-direction guide rail blocks provided on one Z-direction guide rail strip fixedly mounted on a lower surface of the X-direction sliding base; a mounting base B provided on an upper surface of the X-direction sliding base; an X-direction micro actuator in the mounting base B and connected with an X-direction micro-motion platform connected with an XZ biaxial motion platform; two X-direction guide rail strips arranged on the upper surface of the X-direction sliding base; two X-direction guide rail blocks provided on each X-direction guide rail strip mounted on a lower surface of the XZ biaxial motion platform.

Abstract: Disclosed is a processing center multi-axis joint deflection loading apparatus comprising a load-receiving test piece and a load-exerting component. The load-exerting component is constituted by a steel ball, a cap, a ball socket, a bent board, a force sensor, a connection component A, and a connection component B. The connection component A is fixedly connected to a blade handle of the processing center; the blade handle is pulled tight within a bored hole on a main axle; and the connection component A is connected to a main housing via the connection component B.