CN112896934A - Novel split type sprocket shaft group of high-power scraper conveyor - Google Patents

Abstract

The invention discloses a novel split type chain wheel shaft group of a high-power scraper conveyor, which comprises a chain wheel part, wherein the chain wheel part comprises an upper chain wheel body, a lower chain wheel body, a connecting screw, a cylindrical pin and a fixing screw, and the upper chain wheel body and the lower chain wheel body are subjected to box-assembling connection through the connecting screw; a cylindrical pin is arranged between the upper chain wheel body and the lower chain wheel body to transmit torque, and the cylindrical pin is fixed on the chain wheel shaft group through a fixing screw; the different surfaces between the connecting screw and the cylindrical pin are vertical. The invention ensures the connection reliability of the split chain wheel through the innovative design of the split chain wheel structure and the connection mode under the conditions of limited installation space, complete interchange requirement and limited number of connection bolts, only the connection bolts and the cylindrical pins need to be disassembled when the chain wheel is reversed or replaced, the upper chain wheel body and the lower chain wheel body are ejected out and then reassembled, only the old chain wheel ring is disassembled and then a new chain wheel ring is assembled when the chain wheel ring is replaced, a large amount of spare parts are saved, resources are saved, and the strategic target of building a conservation-minded society is met.

Description

Novel split type sprocket shaft group of high-power scraper conveyor

Technical Field

The invention relates to a key transmission system component on a scraper, in particular to a novel split type chain wheel shaft group of a high-power scraper. Belongs to the technical field of coal mine underground coal transportation.

Background

The scraper conveyor is mainly used for continuously conveying coal mined by a coal mining machine to a transfer conveyor in a fully mechanized mining face under a coal mine, so that the coal of the fully mechanized mining face is continuously conveyed out of the mine. The chain wheel shaft group is used as a power output part of the scraper conveyor and is a key part of the scraper conveyor, severe impact of a scraper chain, coal blocks, stones and the like is borne in work, severe working conditions require that the chain wheel has high strength and toughness, and meanwhile, the chain wheel is required to have high wear resistance and long service life.

At present, the main structural form of the domestic and foreign chain wheel shaft group generally adopts an integral structure, and the integral chain wheel shaft group is difficult to reverse and maintain. The sprocket ring is a vulnerable part, needs to be reversed or replaced after being used for a period of time, and has high frequency. When the shaft group is reversed or the chain wheel ring is replaced, the whole chain wheel shaft group needs to be detached from the rack, and the whole chain wheel shaft group is difficult to detach due to large volume and heavy weight.

The underground operation conditions are limited, and when the integral chain wheel piece is replaced, the whole chain wheel shaft group needs to be transported to a maintenance workshop, so that all parts on the shaft group are disassembled. Since the disassembly and assembly affect the performance and the service life of the bearing and the floating seal, the bearing and the floating seal are replaced when the sprocket ring is replaced for the sake of safety, which leads to the increase of maintenance cost and the increase of replacement workload.

Split type sprocket shaft group has very big advantage in the aspect of cost of maintenance and convenience than integral sprocket shaft group, but split type sprocket shaft group's application is less, because integral sprocket is workable more on the one hand, and intensity is easy to be guaranteed, and on the other hand, under equal intensity, in order to arrange the bolt of sufficient quantity and transmit the moment of torsion between the sprocket body inside, split type sprocket shaft group is bigger than the required overall dimension of integral sprocket shaft group, therefore also great to the installation space requirement of frame.

The coal industry is developing towards high power and high efficiency, and the split type chain wheel shaft group can effectively shorten the maintenance time, save the maintenance cost and meet the urgent requirement of improving the productivity of the scraper conveyor.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to solve the problems in the prior art, the novel split type chain wheel shaft group of the high-power scraper conveyor is provided, combines the actual complex working conditions of the underground production of the coal mine, and has the characteristics of simple structure, convenience in disassembly and assembly, easiness in maintenance, high adaptability, long service life and the like.

The technical scheme provided by the invention for solving the technical problem is as follows:

a novel split type chain wheel shaft group of a high-power scraper conveyor comprises a chain wheel component, wherein the chain wheel component comprises an upper chain wheel body, a lower chain wheel body, a connecting screw, a cylindrical pin and a fixing screw, and the upper chain wheel body and the lower chain wheel body are subjected to box combination and connection through the connecting screw; a cylindrical pin is arranged between the upper chain wheel body and the lower chain wheel body to transmit torque, and the cylindrical pin is fixed on the chain wheel shaft group through a fixing screw; the different surfaces between the connecting screw and the cylindrical pin are vertical.

The lower end of the upper chain wheel body is provided with a boss, the upper end of the lower chain wheel body is provided with a groove, and during assembly, the boss of the upper chain wheel body is clamped into the groove of the lower chain wheel body and is subjected to box combination and connection through a connection screw.

In order to increase the strength and the service life of the upper chain wheel body and the lower chain wheel body, a surface quenching process is adopted for treatment.

Aiming at the scraper chain wheel shaft group with the maximum power at present, the invention carries out split design on the basis of the original scraper chain wheel shaft group on the premise of prolonging the service life of the chain wheel shaft group on the principle of meeting the integral interchange with the original integral chain wheel shaft group and aiming at reducing the maintenance cost and improving the maintenance efficiency, thereby ensuring the complete interchange of the split chain wheel shaft group and the integral chain wheel shaft group and the consistency of the overall appearance size, the external size of a chain wheel and the appearance size of a bearing sleeve cup.

Compared with the prior art, the invention has the beneficial effects that:

1. by the innovative design of the split type chain wheel structure and the innovation of the connection mode, the problem that the connection reliability of the split type chain wheel is ensured and the industrial problem is solved under the conditions that the installation space of the chain wheel shaft group of the existing high-power heavy scraper conveyor is limited, the complete interchange is required and the number of the connection bolts is limited is solved.

2. The split sprocket shaft assembly has maintenance advantages. In order to facilitate the disassembly and assembly of the chain wheel ring, the chain wheel ring is divided into two parts which are connected into a whole by bolts when in use. When the chain wheel is reversed or replaced, only the connecting bolt needs to be loosened, the upper chain wheel body and the lower chain wheel body are ejected out and then are installed again, and all parts on the shaft assembly do not need to be detached as before. And the bearing lantern rings on both sides are relatively independent, and the dismouting does not influence each other.

Use split type sprocket shaft group after, compare with original integral sprocket shaft group: when the chain wheel ring is reversed, the whole chain wheel shaft group does not need to be detached from the rack, and only the chain wheel ring is detached for reversing. When the chain wheel ring is replaced, the whole chain wheel shaft group does not need to be detached from the rack, the shaft group does not need to be lifted to a maintenance workshop, and only the old chain wheel ring is detached and then a new chain wheel ring is installed.

3. The maintenance cost is reduced, and the economic benefit is remarkable. The split type chain wheel shaft group which can ensure the strength and can also ensure the space size and position requirements is arranged on the frame of the existing integral type chain wheel shaft group, and the split type chain wheel shaft group can not damage a bearing and a floating seal when a chain wheel piece is replaced, so that the cost of spare parts is saved.

Compared with an integral chain wheel structure, after the split chain wheel shaft group is used, the shutdown time is reduced when the chain wheel ring is replaced, the coal yield is increased, the maintenance and updating cost of equipment is saved, and the production and economic benefits are obvious.

Because split type sprocket shaft group need not all dismantle all parts on the shaft group when changing the sprocket, avoid bearing and floating seal to receive the damage and change because the dismouting, can make bearing, floating seal just use its design life to change like this, the waste of the expensive bearing of significantly reducing and floating seal.

The split type chain wheel can be replaced on the site of a production working face, the shaft group does not need to be detached from the rack and transported back to a maintenance workshop for replacement, and labor cost for returning the chain wheel shaft group to a factory for maintenance is saved.

Compared with the integral type, after the split type chain wheel shaft group is adopted, the frequency of factory returning and maintenance is reduced every year, and a large amount of freight cost can be saved.

4. The sprocket ring and the sprocket shaft are designed into a split structure, only the sprocket ring needs to be replaced after the sprocket ring is worn, other parts of the shaft assembly can be continuously used, a large number of spare parts such as bearings and floating seals are saved, resources are saved, and the strategic target of building a conservation-minded society is met.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the assembly structure of the sprocket shaft assembly of the present invention;

FIG. 2 is a schematic view of the assembled structure of the present invention with the sprocket assembly removed;

FIG. 3 is a schematic structural view of a sprocket assembly of the present invention;

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a top view of FIG. 3;

FIG. 6 is a perspective view of FIG. 3;

FIG. 7 is a cross-sectional view taken at B-B of FIG. 5;

FIG. 8 is a cross-sectional view taken along line A-A of FIG. 5;

FIG. 9 is a schematic structural view of a sprocket body on the sprocket assembly of the present invention;

FIG. 10 is a side view of FIG. 9;

FIG. 11 is a top view of FIG. 9;

FIG. 12 is a perspective view of FIG. 9;

FIG. 13 is a schematic view of the lower sprocket body of the sprocket assembly of the present invention;

FIG. 14 is a side view of FIG. 13;

FIG. 15 is a top view of FIG. 13;

fig. 16 is a perspective view of fig. 13.

In the figure: 1. a left bearing seat; 2. a first flat key; 3. a shaft end pressing plate; 4. a screw; 5. a gasket; 6. crowned tooth couplings; 7. a floating seal seat; 8. a bolt; 9. a floating seal ring; 10. a thread locking ring; 11. a left bearing; 12. a floating seal ring; 13. a floating seal seat; 14. a first O-ring; 15. a sprocket member; 16. an O-shaped ring; 17. a sprocket shaft; 18. a second flat key; 19. a right bearing seat; 20. a second O-ring; 21. a third O-ring; 22. a right bearing housing bushing; 23. a cylindrical pin; 24. a right floating seal seat; 25. a screw; 151. a winding wheel body; 152. a lower sprocket body; 153. a coupling screw; 154. a cylindrical pin; 155. and fixing the screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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 those skilled in the art without any creative effort based on the embodiments of the present invention belong to the protection scope of the present invention, and for the convenience of description, the description of the relative position relationship of the components is described according to the layout manner of the drawings of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the specification layout direction.

Referring to fig. 1-16, the present invention provides the following embodiments:

example (b): a novel split type chain wheel shaft group of a high-power scraper comprises a chain wheel part 15, wherein the chain wheel part 15 comprises an upper chain wheel body 151, a lower chain wheel body 152, a connecting screw 153, a cylindrical pin 154 and a fixing screw 155, and the upper chain wheel body 151 and the lower chain wheel body 152 are subjected to box combination and connection through the connecting screw 153; a cylindrical pin 154 is arranged between the upper sprocket body 151 and the lower sprocket body 152 to transmit torque, and the cylindrical pin 154 is fixed on the sprocket shaft group through a fixing screw 155; the coupling screw 153 is perpendicular to the cylindrical pin 154.

The lower end of the upper sprocket body 151 is provided with a boss, the upper end of the lower sprocket body 152 is provided with a groove, and during assembly, the boss of the upper sprocket body 151 is clamped into the groove of the lower sprocket body 152 and is subjected to box-assembling coupling through a coupling screw 153.

In order to increase the strength and the service life of the upper sprocket body 151 and the lower sprocket body 152, a surface quenching process is adopted for treatment.

The sprocket member 15 is divided into an upper sprocket body 151 and a lower sprocket body 152 according to the overall strength checking result and the machining manufacturability of the sprocket, and is coupled by a coupling screw 153 in a box-combining manner, and due to the influence of factors such as the frame of the scraper machine and the size of bearing seats at both ends, and due to the structural limitation of the sprocket body, it is impossible to arrange more bolts to transmit the torque on the shaft assembly.

In order to transmit a larger torque under the condition of limited space structure and increase the power transmitted by the sprocket shaft group, a cylindrical pin 154 is arranged between the upper sprocket body 151 and the lower sprocket body 152 to transmit the torque. Meanwhile, the cylindrical pin 154 is fixed firmly on the sprocket shaft set by the fixing screw 155.

The working principle and the using process of the invention are as follows:

the novel split type chain wheel shaft group of the high-power scraper machine is mainly used for reducing the speed of the torque of a motor through a speed reducer and increasing the torque, and then driving a chain to move through a chain wheel on the chain wheel shaft group, so that the continuous movement of a scraper is completed, and the coal mined by a fully mechanized coal mining face coal mining machine is transferred to a reversed loader.

The cylindrical pin 154 can be used for ensuring the accurate positioning between the upper chain wheel body 151 and the lower chain wheel body 152 and transmitting very large torque, the box assembling screws of the upper chain wheel body and the lower chain wheel body do not bear the torque transmission function between the upper chain wheel body and the lower chain wheel body, the size and the number of the box assembling screws are not limited, and the difficulty that the spatial positions of bolts are not enough in arrangement on the chain wheel body is perfectly solved.

When in use: firstly, mounting the left end of a chain wheel shaft group, mounting a floating seal ring 12 and an O-shaped ring 14 into a floating seal seat 13 to form a component, and then mounting the component on a chain wheel shaft 17; the floating seal ring 9, the thread locking ring 10, the left bearing 11 and the floating seal ring 12 are arranged in the left bearing seat 1 to form a component, and then are arranged on the chain wheel shaft 17; the floating seal seat 7, the bolt 8 and the floating seal ring 9 are arranged on the crowned tooth coupling 6 to form a component, and then the component is arranged on a chain wheel shaft 17; the shaft end pressing plate 3, the screw 4 and the washer 5 are arranged on the chain wheel shaft 17, and then the right end of the chain wheel shaft group is installed. The floating seal ring 12 and the O-ring 14 are assembled into an assembly with the floating seal holder 13 and then mounted on the sprocket shaft 17. The bearing 11 and the floating seal ring 12 are arranged into a right bearing seat bush 22 to form an assembly, and then the assembly is arranged on the chain wheel shaft 17; the cylindrical pin 23, the O-shaped ring 21 and the right bearing seat 19 are arranged on the serial number right bearing seat bushing 22; the floating seal ring 9, the right floating seal seat 24 and the screw 25 are arranged on the right bearing seat bush 22; the floating seal seat 7, the bolt 8 and the floating seal ring 9 are arranged on the crowned tooth coupling 6 to form a component, and then the component is arranged on a chain wheel shaft 17; the shaft end pressing plate 3, the screw 4, and the washer 5 are attached to the sprocket shaft 17, the flat key 18 is attached to the sprocket shaft 17, and the flat key 2 is attached to the left bearing housing 1 and the right bearing housing 19.

After the sprocket assembly components are fully assembled as shown in FIG. 2, the sprocket assembly 15 is initially installed. Firstly, the key groove of the upper sprocket body 151 and the flat key 18 on the sprocket shaft 17 are aligned and clamped, then the key groove of the lower sprocket body 152 and the flat key 18 on the sprocket shaft 17 are aligned and clamped, the coupling screw 153 is screwed after the above procedures are completed, the cylindrical pin 154 is installed in the upper sprocket body 151 and the lower sprocket body 152, after all the cylindrical pins are correctly installed, all the coupling screws 153 are screwed according to the specified torque requirement, and finally the fixing screw 155 is screwed into the cylindrical pin 154.

When the sprocket is worn to a predetermined level, the fixing screws 155 are removed, the entire cylindrical pins 154 are pulled out by the pin puller, and the coupling screws 153 are removed, so that the upper sprocket body 151 and the lower sprocket body 152 can be separated from the sprocket assembly 15 and the sprocket shaft 17. Subsequently, the upper sprocket body 151 and the lower sprocket body 152 may be horizontally rotated by 180 ° and then mounted according to the previous mounting method.

To this end, the reversal of the sprocket assembly 15 is complete, can be performed downhole and requires a relatively short replacement time. If the chain wheel body is replaced by a new chain wheel body, the operation method is also adopted, and the chain wheel shaft group is not lifted to a maintenance workshop to be replaced.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (3)

1. The utility model provides a novel split type sprocket shaft group of scraper blade machine of high-power, includes sprocket part (15), its characterized in that: the chain wheel component (15) comprises an upper chain wheel body (151), a lower chain wheel body (152), a connecting screw (153), a cylindrical pin (154) and a fixing screw (155), and the upper chain wheel body (151) and the lower chain wheel body (152) are connected in a box combining manner through the connecting screw (153); a cylindrical pin (154) is arranged between the upper chain wheel body (151) and the lower chain wheel body (152) to transmit torque, and the cylindrical pin (154) is fixed on the chain wheel shaft group through a fixing screw (155); the coupling screw (153) is perpendicular to the different surface between the cylindrical pins (154).

2. The novel split type chain wheel shaft group of the high-power scraper conveyor according to claim 1 is characterized in that: the lower extreme of cochain wheel body (151) is provided with the boss, the upper end of lower sprocket body (152) is provided with the recess, and during the assembly, the boss card of cochain wheel body (151) is gone into in the recess of lower sprocket body (152), carries out the joint box coupling through coupling screw (153).

3. The novel split type chain wheel shaft group of the high-power scraper conveyor according to claim 1 is characterized in that: in order to increase the strength and the service life of the upper sprocket body (151) and the lower sprocket body (152), a surface quenching process is adopted for treatment.

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