The invention relates to a kinetic parameter determination method of an extended tooth contact considered crack gear rotor system. The method comprises the following steps: obtaining a basic parameter of a healthy gear and a basic parameter and a crack parameter of a crack gear; establishing a gear meshing rigidity model, which comprises matrix rigidity, of the gear; calculating the matrix rigidity of a driving wheel of the gear and the matrix rigidity of a driven wheel of the gear by a finite element method; determining a gear matrix rigidity correction coefficient of the meshing rigidity model which comprises the matrix rigidity; determining the gear tooth deformation of the gear by a method that a gear transferring error is solved to obtain extended tooth contact considered gear time varying meshing rigidity; obtaining the basic parameters of a shaft and a bearing of a gear rotor system; obtaining a rigidity matrix K of the gear rotor system; and according to the rigidity matrix K of the gear rotor system, constructing an extended tooth contact considered rotor system vibration response analysis model, and determining a system vibration response result of the healthy gear and the crack gear.

Kinetic parameter determination method of extended tooth contact considered crack gear rotor system

The invention discloses a bearing facilitating oil injection and having the long service life. The bearing comprises a bearing pedestal, balls, oil absorption cotton, oil conveying pipes, an oil storage tank, a buoy, ball grooves, a connection rod, a shaft center, a control box, an oil inlet pipe, a sealing cover, check rings, a connection rope, a distance sensor, a buzzer alarm, a PLC and a storage battery. The shaft center is installed in the center of the top of the bearing pedestal. The ball grooves are formed between the bearing pedestal and the shaft center. The balls are installed in the ball grooves. The upper portions of the balls are provided with the check rings. The center of the top of the shaft center is provided with a rotary shaft fixing groove. The oil storage tank is installed in the shaft center. The bottom of the shaft center is connected with the ball grooves through the oil conveying pipes, the sides, close to the ball grooves, of the oil conveying pipes are provided with the oil absorption cotton, the top of the oil storage tank is provided with the oil inlet pipe, a pipe orifice of the oil inlet pipe is installed at the bottom of the rotary shaft fixing groove and provided with the sealing cover, and the buoy is installed in the oil storage tank. According to the bearing, oil injection is facilitated, and the service life of the bearing is greatly prolonged.

Bearing facilitating oil injection and having long service life

A robotic arm system includes a robot arm, a controller and a device for calibrating parallelism The robotic arm comprises an end shaft with an end surface The device for calibrating parallelism is arranged on the end shaft and comprises at least one distance measurement device The method for calibrating parallelism of the robotic arm system comprises the steps of moving the end shaft in a calibration position near a reference plane, bringing the device for calibrating parallelism on to measure the differences in the distances between at least three points to be captured on the reference plane and the end surface, transferring the measurement signal to the controller, and bringing the controller to adapt the pose of the robot arm according to the measurement signal, so that the distances between the points to be captured and the end surface are all identical Thus, the robot arm is quickly and precisely parallel to the work plane under different work requirements

Robotic arm system and method for calibrating parallelism of the same

The invention discloses a manufacturing method of a slewing bearing, belongs to the field of production of slewing bearings, and solves the problems of short service life, weaker quality stability and low machining production efficiency of the traditional slewing bearings The manufacturing method of the slewing bearing comprises a rough machining step, a lineation step, a hole boring step, a semi-finish turning step, a tempering step, a finish machining step, a roller way finish machining step and an assembly step, wherein the tempering step of the inner surface of a roller way is to use a nozzle for aligning to the inner surface of the roller way to spray quenching liquid and immediately stop spraying when rotating by 360-n degrees, and the roller way finish machining step is to grind the inner surface of the roller way by adopting turning to replace grinding The manufacturing method of the slewing bearing can effectively improve the production efficiency, and manufactures the slewing bearings with stable quality, high precision and long service life

Manufacturing method of slewing bearing

The invention relates to a retainer-free rolling bearing. The retainer-free rolling bearing comprises an outer ring, rolling bodies and an inner plastic ring, wherein the plurality of rolling bodies are arranged on the circumferential surface of an inner raceway of the outer ring in a fitting manner, the inner plastic ring is supported in a circular hole which is formed in an inner side bus of all rolling bodies, a small rolling body is arranged between two adjacent rolling bodies, the small rolling body is arranged at the outer side and/or the inner side of the adjacent rolling body, the small rolling body on the outer side is tangential to the circumferential surface of the rolling body and the inner raceway of the outer ring, and the small rolling body on the inner side is tangential to the outer circumferential surface of the rolling body and the inner plastic ring. According to the retainer-free rolling bearing, the small rolling bodies play a role of the retainer among the rolling bodies and are used for separating the rolling bodies, no retainer is needed, and the manufacturing cost of the bearing is reduced; the bottleneck that the traditional retainer window beam cannot be minimized can be eliminated, so that the quantity of the rolling bodies is increased, and the load is increased; the adjustable diameter of the small rolling body is large, so that the adjustable range of the quantity of the rolling bodies is enlarged, and the application range of the bearing is enlarged; the retainer is saved, so that the silence performance of the bearing is greatly improved.

Retainer-free rolling bearing

Combined bearing for forklift truck

The invention relates to a drive component, and particularly relates to a large-scale multi-ball bearing. Aiming at overcoming the deficiency, the invention provides a roller ball bearing which has the advantages that the sliding friction is not generated, the mechanical efficiency is high, and the energy consumption is small. Upper balls and lower balls are arranged between two adjacent main balls, thus, an original instant single-point stressed problem is solved, the original single-point stressing is changed into multi-point common stressing, and the single stress of the bearing is reduced.

Large-scale multi-ball bearing

The utility model discloses a make things convenient for oiling lubrication and make things convenient for reassembling type bearing, including bearing body, oil storage tank, first fixed orifices, first recess, draw -in groove, second recess, oil outlet, rubber buffer, inlet port, oil absorption cotton, fixed slot, second fixed orifices, third fixed orifices, I -shaped round pin, fixed disk and fourth fixed orifices, the bearing body comprises outer lane, solid fixed ring, inner circle and ball, the internal surface center department of outer lane has seted up the second recess, one side of second recess is passed through the oil outlet and is connected with the oil storage tank, one side of oil outlet has connect the oil absorption cotton through super glue, one side of oil storage tankis passed through the inlet port and is connected with the surface of outer lane, the position department that the surface of outer lane is close to the inlet port installs the rubber buffer, the fixed slot has been seted up to one side inside of outer lane, and this make things convenient for oiling lubrication and make things convenient for reassembling type bearing can effectual self -service lubrication, the convenient dismantlement simultaneously.

Make things convenient for oiling lubrication and make things convenient for reassembling type bearing

The invention belongs to the field of bearings, and specifically relates to a large-scale oil supply ball bearing. When the bearing is arranged on a shaft so as to rotate, an oil supply hole formed in an outer ring of the bearing can cause oil to enter a flowing groove from one side of a rolling body, a drainage ring in the flowing groove is made of high-strength liquid-absorption cotton and also has an oil-absorption function, when the bearing rotates, and oil adsorbed on the drainage ring is matched with bulging rings arranged on balls; when the oil is too much, the redundant oil can flow into liquid storing grooves arranged on the two edges of an inner ring along with one sides of the balls, and therefore, the lubricating oil flow is also relatively increased; and the friction force of the bearing is reduced, and the service life of the bearing is prolonged. The large-scale oil supply ball bearing provided by the invention has the advantages that the structure is simple, the operation is convenient, and the large-scale oil supply ball bearing is particularly suitable for large scale equipment which requires high rotating speed, such as high speed trains and marine propellers.

Large-scale oil supply ball bearing

The utility model relates to a rapid roller shaft measurement tool. The rapid roller shaft measurement tool is characterized in that a location block is mounted on one end of the bottom plate; a guide rail extending to the location block is arranged on the other end of the bottom plate; a slider is arranged on the guide rail in a sliding manner; a dial indicator is mounted on the slider; and the slider is in threaded connection with an anchoring screw butting against the guide rail at one end. The rapid roller shaft measurement tool provided by the utility model has the advantage that the roller shaft is placed on the bottom plate during measurement, one end of the roller shaft butts against the inner surface of the location block, and the length of the roller shaft can be determined through the dial indicator on the other end, so that the tool can accurately measure the actual tolerance of the roller shaft.

Xi Yuheng

Papers

Combined bearing for forklift truck

Large-scale multi-ball bearing

Make things convenient for oiling lubrication and make things convenient for reassembling type bearing

Large-scale oil supply ball bearing

Rapid roller shaft measurement tool