CN215378641U - Electric corrosion prevention device for variable frequency motor bearing - Google Patents

Abstract

The utility model discloses an electric corrosion prevention device for a bearing of a variable frequency motor, which comprises a rotary cylinder, an inner cylinder, a bearing, a copper ring, a protection assembly and a fixing clamp, wherein the inner cylinder is arranged in the rotary cylinder, the bearing is arranged in the inner cylinder, the copper ring is arranged on the bearing, the protection assembly is arranged on the copper ring, one end of the fixing clamp is arranged on the bearing, and the other end of the fixing clamp is arranged on the copper ring. The utility model belongs to the technical field of motors, and particularly relates to an electric corrosion prevention device for a bearing of a variable frequency motor.

Description

Electric corrosion prevention device for variable frequency motor bearing

Technical Field

The utility model belongs to the technical field of motors, and particularly relates to an electric corrosion prevention device for a bearing of a variable frequency motor.

Background

Under the condition of normal operation of the motor, lubricating oil films between the inner raceway and the outer raceway of the bearing and the rolling body can play a certain insulating role. For lower shaft voltage, the lubricating oil film can still exert the insulating property, and shaft current cannot be generated. However, when the shaft voltages build up to a certain value and above the breakdown voltage of the bearing grease, they can cause arcing in the bearing, discharging along the path of least resistance to the motor bearings. Particularly at the instant when the bearing inner raceway comes into metallic contact with the rolling elements, the shaft current can reach hundreds of amperes, resulting in small pockmarks in the bearing raceway. When this happens, the bearing grease can also burn out because the bearing steel will melt at a sufficiently high temperature. Numerous dimples distributed throughout the bearing raceway will soon cause excessive vibration and noise due to the extremely frequent electrical discharges. When the lubricating oil is mixed with molten metal particles, the resistance of the oil film is reduced to accelerate the process, and the lubricating oil is carbonized under the electrolysis action of the shaft current. Both of these processes result in poor lubrication properties of the oil, resulting in elevated bearing temperatures and ultimately in electrical corrosion failure of the bearing.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides the electric corrosion prevention device for the bearing of the variable frequency motor, which utilizes the grounding carbon brush in the protection assembly to eliminate the induced potential on the rotating shaft, utilizes the carbon brush abrasion alarm to monitor the length of the carbon brush in real time, and is matched with the fixing clamp to facilitate the replacement of the carbon brush.

In order to realize the functions, the technical scheme adopted by the utility model is as follows: the utility model provides a frequency conversion motor bearing prevents electric corrosion device, includes rotary drum, inner tube, bearing, copper ring, protection component and fixing clip, the inner tube is located in the rotary drum, the bearing is located in the inner tube, the copper ring is located on the bearing, the protection component is located on the copper ring, fixing clip one end is located on the bearing and the other end is located on the copper ring; the fixing clip comprises a fixed end, a hinge, a movable end, a first bolt, a second bolt, a screw rod, a support frame, a torsional spring, a rotating plate, a connecting rod, a fixing plate and a fixing groove, wherein the fixed end is uniformly arranged on the side surface of the bearing, the hinge is connected with the fixed end, the movable end is connected with the hinge and arranged on the bearing, the first bolt is arranged on the fixed end and used for connecting the fixed end with the bearing, the second bolt is arranged on the movable end and used for connecting the movable end with a copper ring, the screw rod is arranged at the upper end of the movable end, the support frame is uniformly arranged on the copper ring, the torsional spring is arranged on the support frame, one end of the rotating plate is connected with the torsional spring, the other end of the rotating plate is arranged on one side of the screw rod, the connecting rod is arranged at one end of the connecting rod far away from the rotating plate, the fixing groove is uniformly arranged on the copper ring, when the copper ring is required to be taken down from the bearing, and loosening the second bolt to separate the movable end of the fixing clamp from the copper ring, rotating the screw rod, moving the screw rod in the direction away from the rotating plate, driving the rotating plate to rotate by the torsion of the torsion spring, driving the connecting rod to rotate by the rotating plate, driving the fixing plate to rotate by the connecting rod, and driving the fixing plate to rotate from the fixing groove so as to realize the separation of the fixing clamp and the copper ring, thereby being convenient for taking down the copper ring.

Further, the protection subassembly includes copper ring cavity, ground connection carbon brush, carbon brush wearing and tearing alarm, sensor line, logical guide wire post and insulating ceramic seal, the copper ring cavity is located on the copper ring, the copper ring cavity is evenly located to the ground connection carbon brush in, carbon brush wearing and tearing alarm is located on the fixed clamping, the sensor line is connected in ground connection carbon brush and carbon brush wearing and tearing alarm, in the copper ring cavity is evenly located to the logical guide wire post and quantity and ground connection carbon brush keep unanimous, insulating ceramic seal locates in the copper ring cavity, drives when inverter motor and revolves the simple sail rotation, can produce the axle current, through the epaxial induction potential of ground connection carbon brush elimination pivot, insulating ceramic seal blocks voltage, draws the electric current safely from the bearing through the logical guide wire post, and the protection bearing avoids stray current to destroy to guarantee to revolve simple high-speed rotation.

Further, fixed plate and fixed slot set up and the radian is unanimous for the arc structure, make the fixed plate along with connecting rod pivoted in-process automatic card to the fixed slot to the realization is to the fixed action of copper ring.

Furthermore, the fixing clamp is at least provided with four groups, and the copper ring is fixed on the bearing from different directions, so that the copper ring is more stably fixed.

The utility model adopts the structure to obtain the following beneficial effects: the utility model provides an electric corrosion prevention device for a bearing of a variable frequency motor, when a copper ring needs to be taken down from the bearing, a second bolt is loosened to separate a movable end of a fixed clamp from the copper ring, a screw rod is rotated and moves in a direction far away from a rotating plate, the torsion of the torsion spring is utilized, the torsion spring drives the rotating plate to rotate, the rotating plate drives a connecting rod to rotate, the connecting rod drives a fixed plate to rotate, the fixed plate rotates from a fixed groove to realize the separation of the fixed clamp and the copper ring, so that the copper ring is convenient to take down, when the variable frequency motor drives a rotary sail to rotate, shaft current is generated, induced potential on the rotating shaft is eliminated through a grounding carbon brush, insulating ceramic seals block voltage, the current is safely led out from the bearing through a lead wire column to protect the bearing from being damaged by stray current, the rotary sail is ensured to be simply rotated at a high speed, the arc-shaped structure is arranged through the fixed plate and the fixed groove and has consistent radian, make the fixed plate along with connecting rod pivoted in-process automatic card to the fixed slot in to the fixed action of realization to the copper ring is equipped with four groups at least through the fixing clip, fixes the copper ring to the bearing from the direction of difference, makes the fixed of copper ring more firm.

Drawings

FIG. 1 is a schematic view of the whole structure of an apparatus for preventing electrical corrosion of a bearing of a variable frequency motor according to the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is a structural diagram of a protection component in the device for preventing the electric corrosion of the bearing of the variable frequency motor of the utility model;

FIG. 4 is a cross-sectional view of a copper ring in an electric corrosion prevention device for a bearing of a variable frequency motor according to the present invention.

The sensor comprises a rotary cylinder 1, a rotary cylinder 2, an inner cylinder 3, a bearing 4, a copper ring 5, a protection assembly 6, a fixing clamp 7, a fixing end 8, a hinge 9, a movable end 10, a bolt I, a bolt II, a bolt 12, a screw rod 13, a support frame 14, a torsion spring 15, a rotary plate 16, a connecting rod 17, a fixing plate 18, a fixing groove 19, a copper ring cavity 20, a grounding carbon brush 21, a carbon brush abrasion alarm 22, a sensor wire 23, a lead wire column 24 and an insulating ceramic seal.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-4, the device for preventing galvanic corrosion of a bearing of a variable frequency motor of the present invention comprises a rotary cylinder 1, an inner cylinder 2, a bearing 3, a copper ring 4, a protection component 5 and a fixing clip 6, wherein the inner cylinder 2 is arranged in the rotary cylinder 1, the bearing 3 is arranged in the inner cylinder 2, the copper ring 4 is arranged on the bearing 3, the protection component 5 is arranged on the copper ring 4, one end of the fixing clip 6 is arranged on the bearing 3, and the other end of the fixing clip 6 is arranged on the copper ring 4; the fixing clip 6 comprises a fixed end 7, a hinge 8, a movable end 9, a first bolt 10, a second bolt 11, a screw 12, a support frame 13, a torsion spring 14, a rotating plate 15, a connecting rod 16, a fixing plate 17 and a fixing groove 18, the fixed end 7 is uniformly arranged on the side surface of the bearing 3, the hinge 8 is connected with the fixed end 7, the movable end 9 is connected with the hinge 8 and is arranged on the bearing 3, the first bolt 10 is arranged on the fixed end 7, the second bolt 11 is arranged on the movable end 9, the screw 12 is arranged at the upper end of the movable end 9, the supporting frames 13 are uniformly arranged on the copper ring 4, the torsion spring 14 is arranged on the supporting frames 13, one end of the rotating plate 15 is connected with the torsion spring 14, the other end is arranged at one side of the screw 12, the connecting rod 16 is connected with the rotating plate 15, the fixed plate 17 is arranged at one end of the connecting rod 16 far away from the rotating plate 15, and the fixed grooves 18 are uniformly arranged on the copper ring 4.

Protection component 5 includes 4 cavitys of copper ring, ground connection carbon brush 20, carbon brush wearing and tearing alarm 21, sensor line 22, logical guide wire post 23 and insulating ceramic seal 24, 4 cavitys of copper ring are located on copper ring 4, 4 cavitys of copper ring are evenly located to ground connection carbon brush 20, carbon brush wearing and tearing alarm 21 is located on fixed clamping 6, sensor line 22 is connected in ground connection carbon brush 20 and carbon brush wearing and tearing alarm 21, logical guide wire post 23 evenly locates in 4 cavitys of copper ring and quantity and ground connection carbon brush 20 keep unanimous, insulating ceramic seal 24 is located in 4 cavitys of copper ring.

The fixing plate 17 and the fixing groove 18 are arc-shaped structures and have the same radian.

The fixing clips 6 are at least provided with four groups.

When the simple sail is used concretely, when the variable frequency motor drives the simple sail to rotate, shaft current is generated, the induced potential on the rotating shaft is eliminated through the grounding carbon brush 20, the insulating ceramic seal 24 blocks voltage, the current is safely led out of the bearing 3 through the lead screw column 23, the bearing 3 is protected from being damaged by stray current, high-speed rotation of the simple sail is ensured, the length of the grounding carbon brush 20 is monitored in real time through the carbon brush abrasion alarm 21, when the extension of the grounding carbon is lower than a limit value, the bolt II 11 is loosened, the movable end 9 of the fixing clamp 6 is separated from the copper ring 4, the screw 12 is rotated, the screw 12 moves in the direction far away from the rotating plate 15, the rotating plate 15 is rotated through the torsion of the torsion spring 14, the rotating plate 15 drives the connecting rod 16 to rotate, the connecting rod 16 drives the fixing plate 17 to rotate, the fixing plate 17 rotates from the fixing groove 18, so that the fixing clamp 6 is separated from the copper ring 4, the replacement of the carbon brush 20 connected to the copper ring 4 in an internal manner is facilitated.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (4)

1. The utility model provides a frequency conversion motor bearing prevents electric corrosion device which characterized in that: the device comprises a rotary cylinder, an inner cylinder, a bearing, a copper ring, a protection assembly and a fixing clamp, wherein the inner cylinder is arranged in the rotary cylinder, the bearing is arranged in the inner cylinder, the copper ring is arranged on the bearing, the protection assembly is arranged on the copper ring, one end of the fixing clamp is arranged on the bearing, and the other end of the fixing clamp is arranged on the copper ring; the fixing clamp comprises a fixed end, a hinge, a movable end, a first bolt, a second bolt, a screw rod, a support frame, a torsional spring, a rotating plate, a connecting rod, a fixed plate and a fixed groove, wherein the fixed end is evenly arranged on the side face of the bearing, the hinge is connected to the fixed end, the movable end is connected to the hinge and is arranged on the bearing, the first bolt is arranged on the fixed end, the second bolt is arranged on the movable end, the upper end of the movable end is arranged on the screw rod, the support frame is evenly arranged on a copper ring, the torsional spring is arranged on the support frame, one end of the rotating plate is connected to the torsional spring and the other end of the rotating plate and is arranged on one side of the screw rod, the connecting rod is connected to the rotating plate, one end of the rotating plate is far away from the fixed plate, and the fixed groove is evenly arranged on the copper ring.

2. The device for preventing the electric corrosion of the bearing of the variable frequency motor as claimed in claim 1, wherein: the protection subassembly includes copper ring cavity, ground connection carbon brush, carbon brush wearing and tearing alarm, sensor line, logical guide wire post and insulating ceramic seal, the copper ring cavity is located on the copper ring, the copper ring cavity is evenly located to the ground connection carbon brush in, carbon brush wearing and tearing alarm is located on the fixed clamping, the sensor line is connected in ground connection carbon brush and carbon brush wearing and tearing alarm, the logical guide wire post is evenly located in the copper ring cavity and quantity and ground connection carbon brush keep unanimous, insulating ceramic seal locates in the copper ring cavity.

3. The device for preventing the electric corrosion of the bearing of the variable frequency motor as claimed in claim 2, wherein: the fixed plate and the fixed groove are of arc-shaped structures and have consistent radians.

4. The device for preventing the electric corrosion of the bearing of the variable frequency motor as claimed in claim 3, wherein: the fixing clips are at least provided with four groups.

Images