CN215363359U

CN215363359U - Wear-resistant alloy middle hanging shaft for screw conveyor

Info

Publication number: CN215363359U
Application number: CN202121762235.6U
Authority: CN
Inventors: 唐志雄; 王永成; 江浩超
Original assignee: Zhuhai Huigao Machinery Equipment Co ltd
Current assignee: Zhuhai Huigao Machinery Equipment Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2021-12-31
Anticipated expiration: 2031-07-30

Abstract

The utility model provides a wear-resistant alloy middle hanging shaft for a screw conveyor, which comprises: the support is provided with an assembly center hole, the steel sleeve is assembled in the assembly center hole of the support in an interference fit mode, a plurality of seam-riding screw holes distributed in a circumferential array mode with the center of the assembly center hole as the center are formed in the assembly position of the steel sleeve and the assembly center hole of the support, set screws are installed in the seam-riding screw holes, the alloy sleeve bearing is pressed in the heated steel sleeve through an oil press, a plurality of alloy strips distributed in a circumferential array mode with the center of the main shaft as the center are arranged on the main shaft, the main shaft is embedded into an inner hole of the alloy sleeve bearing through the alloy strips, and wool felts are installed at the front end and the rear end of the assembly position of the main shaft and the alloy sleeve bearing. According to the utility model, through optimizing the assembly structure of the hanging shaft, the wear resistance of the assembly structure can be enhanced, the service life is prolonged, oil injection is not required, and the maintenance cost is reduced.

Description

Wear-resistant alloy middle hanging shaft for screw conveyor

Technical Field

The utility model relates to a middle suspension shaft, in particular to a wear-resistant alloy middle suspension shaft for a screw conveyor.

Background

Usually, the screw conveyer with the conveying distance exceeding 5 meters is mainly manufactured in a subsection mode and assembled together on the spot of a client. At present, the outer pipe of the sectional screw conveyor is rigidly connected by a flange, the inner pipe (screw shaft) is connected by a middle suspension shaft, and the middle suspension shaft plays a role in supporting and transmitting torque. The existing middle suspension shaft generally comprises a support, an end cover, a main shaft, a wool felt, a framework oil seal, a Teflon gasket, a snap spring, a grease nipple seat, a connecting bolt and the like. Wherein the support is used for fixed main shaft, and inside is inlayed wear-resisting tin bronze cover, and tin bronze cover hole, excircle are all processed there is the oil groove, guarantee to reach main shaft excircle surface from the butter that the butter mouth pours into, play good lubrication action, and the skeleton oil blanket plays sealed effect, prevents that inside butter from leaking, and the butter mouth is used for regularly filling the butter and avoids the main shaft wearing and tearing.

As most screw conveyors are used for conveying materials in an inclined and upward manner, the mandrel (screw shaft) pushes the materials to move upwards when rotating, and the downward axial force borne by the mandrel (screw shaft) is larger; in addition, the length of the mandrel (the spiral shaft) is generally 2.5-5 meters, the rotating speed is 145-290 RPM, and the mandrel (the spiral shaft) can swing greatly during working, so that the abrasion between the main shaft and the tin bronze sleeve on the support is relatively serious, once the abrasion reaches a certain degree, a sealing structure consisting of a Teflon gasket, a wool felt and a framework oil seal can be damaged, dust enters the inside of the shaft and breaks down, abnormal sound and even breakage of the middle hanging shaft are caused, and the spiral conveyor stops due to failure.

In order to ensure the reliable lubrication of the middle hanging shafts, each middle hanging shaft is independently provided with an oil injection pipe, in order to reduce the length of the oil injection pipe, oil injection points are arranged at the left end and the right end of the screw conveyor, and the oil injection pipes arranged on the middle hanging shafts of the screw conveyor are relatively long, the length of the oil injection pipes reaches 7-14 meters, the oil injection resistance is large, and the oil way is easy to block. When the screw conveyor works, each middle hanging shaft needs to be filled with oil manually once every day. The existing middle hanging shaft structure mainly has the following defects: 1) the oil injection pipeline is long, the resistance is large, and the oil way is easy to block. 2) And each middle suspension shaft is provided with a separate oil way, so that the cost is high. 3) The tin bronze sleeve is easy to wear and has a short service life. 4) Need oiling every day, and the oiling is some many, and the maintenance cost is high.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides the wear-resistant alloy middle suspension shaft for the screw conveyor, which can enhance the wear resistance of an assembly structure and prolong the service life by optimizing the assembly structure of the middle suspension shaft, and can reduce the maintenance cost without oil injection.

In order to realize the technical scheme, the utility model provides a wear-resistant alloy middle suspension shaft for a screw conveyor, which comprises: the support is provided with an assembly center hole, the steel sleeve is assembled in the assembly center hole of the support in an interference fit mode, a plurality of seam-riding screw holes distributed in a circumferential array mode with the center of the assembly center hole as the center are formed in the assembly position of the steel sleeve and the assembly center hole of the support, set screws are installed in the seam-riding screw holes, the alloy sleeve bearing is pressed in the heated steel sleeve through an oil press, a plurality of alloy strips distributed in a circumferential array mode with the center of the main shaft as the center are arranged on the main shaft, the main shaft is embedded into an inner hole of the alloy sleeve bearing through the alloy strips, wool felts are installed at the front end and the rear end of the assembly position of the main shaft and the alloy sleeve bearing, and the wool felts, the main shaft, the alloy sleeve bearing, the steel sleeve and the set screws are sealed on the support through end covers.

According to the technical scheme, after the outer circle of the steel sleeve is in interference fit with the assembling center hole of the support, the steel sleeve is expanded at a fit gap by adopting a set screw, so that the connection strength between the steel sleeve and the support can be enhanced, looseness under the condition of large torsion is prevented, the alloy sleeve bearing and the steel sleeve adopt a hot-assembling mode, the steel sleeve is heated to 500-600 ℃ firstly, the size of a steel sleeve thermal expansion inner hole is increased, then the alloy sleeve bearing is placed into the inner hole of the steel sleeve, the steel sleeve is pressed into the inner hole of the support by an oil press after the steel sleeve is cooled to the normal temperature, the end faces of the alloy sleeve bearing and the steel sleeve are aligned, the connection strength between the alloy sleeve bearing and the steel sleeve is enhanced by adopting the hot-assembling mode, the main shaft is embedded into the inner hole of the alloy sleeve bearing through an alloy strip, and an alloy friction pair is adopted, so that the wear resistance and the high temperature resistance of a butt joint can be enhanced, and the service life of the main shaft is prolonged.

Preferably, the main shaft comprises a main shaft body, twelve alloy strip welding grooves distributed in a circumferential array with the center of the main shaft as the center are formed in the main shaft body, the alloy strips are welded in the alloy strip welding grooves, and the alloy strips are embedded in the main shaft, so that the wear resistance of the main shaft can be improved.

Preferably, the main shaft body is further provided with a clamp spring groove, the clamp spring is installed in the clamp spring groove, and the clamp spring is used for axial limiting of the main shaft and preventing axial movement of the main shaft.

Preferably, the spline is respectively arranged at the front end and the rear end of the main shaft body, so that the main shaft body is conveniently butted with an external mandrel.

Preferably, the top of support is provided with a plurality of connection screw holes, makes things convenient for the high-speed joint of support and external component.

The wear-resistant alloy middle hanging shaft for the screw conveyor has the beneficial effects that: this hanging axle reasonable in design hangs in wear-resisting alloy for screw conveyer through the optimization to hanging axle assembly structure, can strengthen assembly structure's wear resistance, increase of service life need not the oiling moreover, reduces the maintenance cost. After the outer circle of the steel sleeve is in interference fit with the assembling center hole of the support, the steel sleeve is expanded tightly by adopting a set screw at a fit gap, so that the connection strength between the steel sleeve and the support can be enhanced, the looseness under the condition of large torsion is prevented, the connection strength between the alloy sleeve bearing and the steel sleeve is enhanced by adopting a hot-assembling mode for the alloy sleeve bearing and the steel sleeve, the main shaft is embedded into an inner hole of the alloy sleeve bearing through an alloy strip, and the wear resistance, the high temperature resistance and the service life of a butt joint can be enhanced by adopting an alloy friction pair.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Fig. 3 is a cross-sectional view of a stent in the present application.

Fig. 4 is a schematic structural diagram of the spindle in the present invention.

In the figure: 1. a support; 2. a main shaft; 21. a main shaft body; 22. alloy strips; 23. a clamp spring groove; 24. a spline; 3. an end cap; 4. an end cover fastening bolt; 5. a connecting bolt; 6. wool felt; 7. steel jacket; 8. an alloy sleeve bearing; 9. tightening the screw; 10. and a clamp spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of the present invention.

Example (b): a wear-resistant alloy middle suspension shaft for a screw conveyor.

Referring to fig. 1 to 4, a wear-resistant alloy middle hanger shaft for a screw conveyor includes: the steel sleeve bearing comprises a support 1 and a main shaft 2, wherein the top of the support 1 is provided with three connecting screw holes, connecting bolts 5 are arranged in the connecting screw holes to facilitate the quick connection of the support 1 and external parts, an assembly center hole is arranged on the support 1, a steel sleeve 7 is assembled in the assembly center hole of the support 1 through interference fit, four seam-riding screw holes distributed in a circumferential array mode by taking the center of the assembly center hole as the center are formed in the assembly position of the steel sleeve 7 and the assembly center hole of the support 1, fastening screws 9 are arranged in the seam-riding screw holes, after the excircle of the steel sleeve 7 is in interference fit with the assembly center hole of the support 1, the steel sleeve 7 is expanded through the fastening screws 9 at the fit gaps, the connection strength between the steel sleeve 7 and the support 1 can be enhanced, the looseness under the condition of large torsion is prevented, an alloy sleeve bearing 8 is pressed in the heated steel sleeve 7 through an oil press, the main shaft 2 comprises a main shaft body 21, twelve alloy strip welding grooves distributed in a circumferential array with the circle center of the main shaft 2 as the center are arranged on the main shaft body 21, the alloy strips 22 are welded in the alloy strip welding grooves, the alloy strips 22 are embedded on the main shaft 2, can improve main shaft 2's wear resistance, main shaft 2 still is provided with jump ring groove 23 through the hole of alloy strip 22 embedding to alloy sleeve bearing 8 on the main shaft body 21, and jump ring 10 is installed in jump ring groove 23, jump ring 10 are used for the axial of main shaft 2 spacing, prevent its axial float, and spline 24 has all been seted up at both ends around the main shaft body 21, convenient and the butt joint of outside dabber, wool felt 6 is all installed at both ends around main shaft 2 and the assembly department of alloy sleeve bearing 8, wool felt 6 adsorbs lubricating oil, plays lubricated effect, end cover 3 seals wool felt 6, main shaft 2, alloy sleeve bearing 8, steel bushing 7 and holding screw 9 on support 1 through end cover fastening bolt 4.

This hanging axle reasonable in design hangs in wear-resisting alloy for screw conveyer through the optimization to hanging axle assembly structure, can strengthen assembly structure's wear resistance, increase of service life need not the oiling moreover, reduces the maintenance cost. After the outer circle of the steel sleeve 7 is in interference fit with the assembling center hole of the support 1, the steel sleeve 7 and the support 1 are expanded tightly by adopting a set screw 9 at a fit gap, the connection strength between the steel sleeve 7 and the support 1 can be enhanced, looseness under the condition of large torsion is prevented, the alloy sleeve bearing 8 and the steel sleeve 7 are in a hot-assembling mode, the steel sleeve 7 is heated to 500-600 ℃, the size of a heated expansion inner hole of the steel sleeve 7 is increased, then the alloy sleeve bearing 8 is placed into the inner hole of the steel sleeve 7, after the steel sleeve 7 is cooled to normal temperature, the steel sleeve 7 is pressed into the inner hole of the support 1 by using an oil press, the end faces are aligned, the connection strength between the alloy sleeve bearing 8 and the steel sleeve 7 is enhanced by adopting the hot-assembling mode, the main shaft 2 is embedded into the inner hole of the alloy sleeve bearing 8 through an alloy strip 22, and an alloy friction pair is adopted, so that the abrasion resistance and the high temperature resistance of a butt joint can be enhanced, and the service life is prolonged.

Compared with the prior art, the utility model cancels the framework oil seal and the Teflon gasket, and reduces the parts; a grease nozzle is omitted, and oiling is not needed, so that the working procedures of the bracket are reduced; the alloy friction pair is adopted, so that the wear resistance, the high temperature resistance and the longer service life are realized.

The above description is only for the preferred embodiment of the present invention, but the present invention should not be limited to the embodiment and the disclosure of the drawings, and therefore, all equivalent or modifications that do not depart from the spirit of the present invention are intended to fall within the scope of the present invention.

Claims

1. A wear-resistant alloy middle suspension shaft for a screw conveyor comprises: support and main shaft, its characterized in that: the support is provided with an assembly center hole, the steel sleeve is assembled in the assembly center hole of the support in an interference fit mode, a plurality of seam-riding screw holes distributed in a circumferential array mode with the center of the assembly center hole as the center are formed in the assembly position of the steel sleeve and the assembly center hole of the support, set screws are installed in the seam-riding screw holes, the alloy sleeve bearing is pressed in the heated steel sleeve through an oil press, a plurality of alloy strips distributed in a circumferential array mode with the center of the main shaft as the center are arranged on the main shaft, the main shaft is embedded into an inner hole of the alloy sleeve bearing through the alloy strips, wool felts are installed at the front end and the rear end of the assembly position of the main shaft and the alloy sleeve bearing, and the wool felts, the main shaft, the alloy sleeve bearing, the steel sleeve and the set screws are sealed on the support through end covers.

2. The wear-resistant alloy middle suspension shaft for the screw conveyor as claimed in claim 1, wherein: the spindle comprises a spindle body, twelve alloy strip welding grooves distributed in a circumferential array mode with the center of a circle of the spindle as the center are formed in the spindle body, and the alloy strips are welded in the alloy strip welding grooves.

3. The wear-resistant alloy middle suspension shaft for the screw conveyor as claimed in claim 2, wherein: the spindle body is further provided with a clamp spring groove, and the clamp spring is installed in the clamp spring groove.

4. The wear-resistant alloy middle suspension shaft for the screw conveyor as claimed in claim 3, wherein: the front end and the rear end of the main shaft body are both provided with splines.

5. The wear-resistant alloy middle suspension shaft for the screw conveyor as claimed in claim 1, wherein: the top of support is provided with a plurality of connection screw.