阅读说明：本技术 主通风机轮毂改造中轴承箱更换方法 (Method for replacing bearing box in main ventilator hub reconstruction ) 是由 王先军 陈伟 刘其凯 杨伟 于 2020-07-20 设计创作，主要内容包括：本发明涉及矿井通风机领域,具体涉及主通风机轮毂改造中轴承箱更换方法,包括如下步骤：拆除旧的轴承箱、将旧的主轴及轴承组件从旧轴承箱内拆除、将新的主轴及轴承组件从新的轴承箱内拆除、将新的主轴及轴承组件安装至旧的轴承箱外壳中、将组装好的轴承箱重新安装至进气箱内,完成轴承箱的更换。本发明的优点在于：充分利用旧的轴承箱外壳,省去研磨工作,轴承箱更换用时较短,能够快速完成轴承箱的更换工作。(The invention relates to the field of mine ventilators, in particular to a method for replacing a bearing box in the hub modification of a main ventilator, which comprises the following steps: the replacement of the bearing housing is completed by removing the old bearing housing, removing the old spindle and bearing assembly from the old bearing housing, removing the new spindle and bearing assembly from the new bearing housing, installing the new spindle and bearing assembly into the old bearing housing shell, and reinstalling the assembled bearing housing into the air intake housing. The invention has the advantages that: the old bearing box shell is fully utilized, grinding work is omitted, the bearing box is short in replacement time, and replacement work of the bearing box can be completed quickly.)

1. A method for replacing a bearing box in the process of main ventilator hub reconstruction is characterized in that: the method comprises the following steps:

s1, removing the hub of the main ventilator, exposing the old bearing box, removing the bearing box from the air inlet box, and hoisting the bearing box to the ground;

s2, removing the old main shaft (1) and the bearing assembly from the bearing box;

the method specifically comprises the following steps:

s21, hoisting the first end of the main shaft (1);

s22, supporting the second end of the main shaft (1);

s23, removing the connection fixing points of the bearing assembly in the bearing box to separate the bearing assembly from the fixing of the bearing box shell (2);

s24, removing the main shaft (1) together with the bearing assembly from the bearing box shell (2), and then moving the main shaft (1) together with the bearing assembly to a position which does not influence construction;

s3, removing the main shaft (1) together with the bearing assembly in the new bearing box by the same method;

s4, loading the new spindle (1) with the bearing assembly into the old bearing housing shell (2);

and s5, reinstalling the assembled bearing box into the air inlet box to complete the replacement of the bearing box.

2. The method for replacing a bearing housing in the modification of a hub of a main ventilator according to claim 1, wherein: in the step s21, a matched steel pipe (3) is penetrated into the first end of the main shaft (1), and the steel pipe (3) is lifted by using a lifting tool (4) in the fan room, so that the first end of the main shaft (1) is lifted.

3. The method for replacing a bearing housing in the modification of a hub of a main ventilator according to claim 2, wherein: and step s22, arranging a hydraulic trolley (5) at the second end of the main shaft (1), placing a cushion block (6) on the hydraulic trolley (5), moving the hydraulic trolley (5) until the cushion block (6) is positioned below the second end of the main shaft (1), and controlling the hydraulic trolley (5) to lift the cushion block (6) so as to support the second end of the main shaft (1).

4. The method for replacing a bearing housing in the modification of a hub of a main ventilator according to claim 3, wherein: in the step s24, the hydraulic trolley (5) is pulled, and the hoisting part of the hoisting tool (4) is moved at the same time, so that the hydraulic trolley (5), the main shaft (1), the bearing assembly and the hoisting part of the hoisting tool (4) move in the direction of the second end of the main shaft (1) in the same direction, and the main shaft (1) and the bearing assembly are moved out of the bearing box shell (2).

5. The method for replacing a bearing housing in the modification of a hub of a main ventilator according to claim 3, wherein: the cushion blocks (6) adopt railings which span between the two lifting plates of the hydraulic trolley (5) and are perpendicular to the two lifting plates of the hydraulic trolley (5).

6. The method for replacing a bearing housing in the modification of a hub of a main ventilator according to claim 3, wherein: a groove (61) is formed in the cushion block (6), and the second end of the main shaft (1) is arranged in the groove (61).

7. The method for replacing a bearing housing in the modification of a hub of a main ventilator according to claim 6, wherein: the cross section of the groove (61) is triangular.

8. The method for replacing a bearing housing in the modification of a hub of a main ventilator according to claim 6, wherein: the cross section of the groove (61) is arc-shaped.

9. The method for replacing a bearing housing in the modification of a hub of a main ventilator according to claim 2, wherein: and a rubber pad is arranged on the inner wall of the steel pipe (3).

10. The method for replacing a bearing housing in the modification of a hub of a main ventilator according to claim 1, wherein: step s4, mounting the bearing assembly on a new main shaft (1), inserting a matched steel pipe (3) into the first end of the new main shaft (1) after penetrating through an old bearing box shell (2), and lifting the steel pipe (3) by using a lifting tool (4) in a fan room so as to lift the first end of the main shaft (1);

arranging a hydraulic trolley (5) at the second end of the new main shaft (1), placing a cushion block (6) on the hydraulic trolley (5), moving the hydraulic trolley (5) until the cushion block (6) is positioned below the second end of the new main shaft (1), and controlling the hydraulic trolley (5) to lift the cushion block (6) so as to support the second end of the main shaft (1);

the hydraulic trolley (5) is moved, and meanwhile, the hoisting part of the hoisting machine tool (4) is moved, so that the hydraulic trolley (5), the new spindle (1), the bearing assembly and the hoisting part of the hoisting machine tool (4) move in the same direction as the old bearing box shell (2), and the new spindle (1) and the bearing assembly are moved into the bearing box shell (2);

the new spindle (1) is then fitted into the old bearing housing shell (2) together with the bearing assembly.

Technical Field

The invention relates to the field of mine ventilators, in particular to a method for replacing a bearing box in the hub modification of a main ventilator.

Background

The main ventilator is mainly used for mine ventilation, and for example, a Chinese utility model patent with the publication number of CN204436830U discloses a mining disrotatory main ventilator with a transmission system, the main machine assembly comprises a main machine shell, a cylinder ring internally provided with an impeller is fixed on the main machine shell through a flange, a bearing box is arranged on a central axis in the main machine shell, and a first sealing plate and a second sealing plate are fixed at two ends of the main machine shell; the motor assembly comprises a motor shell, the motor is fixed on a central axis in the primary motor shell, a third sealing plate is arranged at one end, close to the host machine assembly, of the motor shell, one end of a coupler is installed on a bearing box, one end of the coupler is installed on the motor shaft, and the other end of the bearing box is provided with an impeller in a barrel ring. It is mainly used for mine ventilation.

In the construction of changing an N-shaped hub into a B-shaped hub of a main ventilator, the original bearing box is replaced. The requirement of the contact surface between the bearing box and the base is strict, and the grinding needs to be performed in a long time at the initial installation stage so as to ensure that the contact surface meets the installation requirement. However, in the process of transforming the N-shaped hub of the main ventilator, the operation of a single ventilator is involved, the operation is mostly carried out during the period of production stoppage and maintenance, the construction period is generally required to be short, and if new bearing boxes are ground, the replacement construction is difficult to complete in a short time. Therefore, an optimal optimization scheme needs to be determined, and the bearing box replacement construction is rapidly completed by adopting a new process.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the technical problem that the replacement of a bearing box of a main ventilator in the prior art is long in time is solved.

The invention solves the technical problems through the following technical means: a method for replacing a bearing box in the hub reconstruction of a main ventilator comprises the following steps:

s1, removing the hub of the main ventilator, exposing the old bearing box, removing the bearing box from the air inlet box, and hoisting the bearing box to the ground;

s2, removing the old spindle and bearing assembly from the bearing housing;

the method specifically comprises the following steps:

s21, hoisting the first end of the main shaft;

s22, supporting the second end of the main shaft;

s23, removing the connection fixing points of the bearing assembly in the bearing box to separate the bearing assembly from the fixing of the bearing box shell;

s24, removing the main shaft together with the bearing assembly from the bearing box shell, and then moving the main shaft together with the bearing assembly to a position which does not influence the construction;

s3, removing the main shaft together with the bearing assembly in the new bearing box by the same method;

s4, loading the new spindle with the bearing assembly into the old bearing housing;

and s5, reinstalling the assembled bearing box into the air inlet box to complete the replacement of the bearing box.

Because the old bearing box shell can not be damaged generally when the ventilator actually works, when the bearing box is replaced by adopting the method, only the new main shaft and the bearing assembly are installed in the old bearing box shell, and the old bearing box shell is ground when being installed for the first time, the matching between the bearing box shell and the installation position can be ensured; the construction is rapid, the scheme effectively solves the problem that a large amount of time is consumed for installing and grinding a new bearing box in the transformation process, and saves time for rapidly realizing wheel hub transformation; the scheme can quickly solve the problem of replacement of the bearing box, shortens the time for transforming the hub of the whole ventilator, also shortens the time for operating a single fan, and provides effective guarantee for safe operation of the fan; the method has the advantages that the operability is realized, the operation is simple, and no additional construction tools are added except normal construction tools when the new main shaft and the bearing assembly are installed in the shell of the old bearing box; in addition, the whole operation takes about 3 hours, and the time consumption is shorter compared with the prior art. In addition, in terms of economic efficiency: the quick replacement effectively shortens the construction period, greatly saves the labor cost, and does not additionally increase auxiliary mechanical equipment and the like in the process change; in the aspect of social benefits: the application of the process effectively shortens the construction time, reduces the pressure for the operation of a single fan in the construction process, and provides guarantee for the safety production of mines.

Preferably, in step s21, a matching steel pipe is inserted into the first end of the main shaft, and a hoisting tool in the fan room is used to hoist the steel pipe, so as to hoist the first end of the main shaft.

Preferably, in step s22, a hydraulic trolley is disposed at the second end of the main shaft, a pad block is disposed on the hydraulic trolley, the hydraulic trolley is moved to a position below the second end of the main shaft, and the hydraulic trolley is controlled to lift the pad block to support the second end of the main shaft.

Preferably, in step s24, the hydraulic trolley is pulled, and the lifting part of the lifting tool is moved at the same time, so that the hydraulic trolley, the main shaft, the bearing assembly, and the lifting part of the lifting tool move in the same direction as the second end of the main shaft, and the main shaft and the bearing assembly are moved out of the housing of the bearing housing.

Preferably, the cushion blocks are made of rail wood, the rail wood spans between the two lifting plates of the hydraulic trolley, and the rail wood is perpendicular to the two lifting plates of the hydraulic trolley.

Preferably, the cushion block is provided with a groove, and the second end of the main shaft is arranged in the groove.

The main shaft has larger mass, and the groove is used for limiting the main shaft to roll so as to avoid replacement failure and potential safety hazard.

Preferably, the cross section of the groove is triangular.

Preferably, the cross section of the groove is arc-shaped.

Preferably, the inner wall of the steel pipe is provided with a rubber pad.

Optimally, in step s4, the bearing assembly is installed on a new main shaft, the matched steel pipe firstly penetrates through the old bearing box shell and then is inserted into the first end of the new main shaft, and a hoisting tool in a fan room is used for hoisting the steel pipe so as to hoist the first end of the main shaft;

arranging a hydraulic trolley at the second end of the new main shaft, placing a cushion block on the hydraulic trolley, moving the hydraulic trolley to the position, below the second end of the new main shaft, of the cushion block, and controlling the hydraulic trolley to lift the cushion block so as to support the second end of the main shaft;

moving the hydraulic trolley and simultaneously moving the hoisting part of the hoisting machine tool to enable the hydraulic trolley, the new main shaft, the bearing assembly and the hoisting part of the hoisting machine tool to move towards the old bearing box shell in the same direction, and further moving the new main shaft and the bearing assembly into the bearing box shell;

the new spindle with bearing assembly is then fitted into the old bearing housing shell.

The invention has the advantages that:

1. since the old bearing housing casing is not generally damaged when the ventilator is actually operated, when the bearing housing is replaced by the above method, only the new main shaft together with the bearing assembly is installed in the old bearing housing casing, the old bearing box shell is ground when being installed for the first time, so that the matching between the bearing box shell and an installation position can be ensured, in the process of transforming the N-shaped hub of the main ventilator, the operation of a single ventilator needs to be carried out during the period of shutdown maintenance, under the condition of short construction period, the method can quickly finish the replacement of the bearing box, the whole replacement time is shorter than that of the prior art, in addition, the construction scheme has the advantages that in the process of changing the N-type hub into the B-type hub in a mining area, the bearing box is quickly replaced for the first time, and the scheme is feasible through demonstration guidance of manufacturers; the construction is rapid, the scheme effectively solves the problem that a large amount of time is consumed for installing and grinding a new bearing box in the transformation process, and saves time for rapidly realizing wheel hub transformation; the scheme can quickly solve the problem of replacement of the bearing box, shortens the time for transforming the hub of the whole ventilator, also shortens the time for operating a single fan, and provides effective guarantee for safe operation of the fan; the method has the advantages that the operability is realized, the operation is simple, and no additional construction tools are added except normal construction tools when the new main shaft and the bearing assembly are installed in the shell of the old bearing box; in addition, the whole operation takes about 3 hours, and the time consumption is shorter compared with the prior art. In addition, in terms of economic efficiency: the quick replacement effectively shortens the construction period, greatly saves the labor cost, and does not additionally increase auxiliary mechanical equipment and the like in the process change; in the aspect of social benefits: the application of the process effectively shortens the construction time, reduces the pressure for the operation of a single fan in the construction process, and provides guarantee for the safety production of mines.

2. The main shaft has larger mass, and the groove is used for limiting the main shaft to roll so as to avoid replacement failure and potential safety hazard.

Drawings

FIG. 1 is a schematic view of a spindle supported in a bearing housing in an embodiment of the present invention;

FIG. 2 is a schematic view of the main shaft of the embodiment of the invention when the main shaft is supported outside the bearing box shell;

FIG. 3 is a schematic view of a triangular groove on a spacer according to an embodiment of the present invention;

FIG. 4 is a schematic view illustrating a groove of a spacer in the embodiment of the present invention in the shape of a circular arc;

the device comprises a main shaft-1, a bearing box shell-2, a steel pipe-3, a hoisting machine-4, a hydraulic trolley-5, a cushion block-6 and a groove-61.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. 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.

A method for replacing a bearing box in the hub reconstruction of a main ventilator comprises the following steps:

s1, removing the hub of the main ventilator, exposing the old bearing box, removing the bearing box from the air inlet box, and hoisting the bearing box to the ground;

s2, removing the old main shaft 1 and bearing assembly from the bearing box;

the method specifically comprises the following steps:

s21, hoisting the first end of the main shaft 1;

specifically, as shown in fig. 1, a matching steel pipe 3 is inserted into a first end of a main shaft 1, and a hoisting tool 4 in a fan room is used for hoisting the steel pipe 3, so as to hoist the first end of the main shaft 1. The hoisting machine 4 in the fan room can adopt an electric hoist, a mobile small crane and the like, and is optimized, and the rubber pad is arranged on the inner wall of the steel pipe 3. Specifically, a circle of rubber pad is laid on the inner wall of the steel pipe 3, the rubber pad can be bonded on the inner wall of the steel pipe 3, and the rubber pad is arranged to increase the friction force between the main shaft 1 and the steel pipe 3 so as to prevent the main shaft 1 from falling off from the steel pipe 3 during hoisting.

s22, supporting the second end of the main shaft 1;

specifically, as shown in fig. 1, a hydraulic trolley 5 is arranged at the second end of the main shaft 1, a cushion block 6 is placed on the hydraulic trolley 5, the hydraulic trolley 5 is moved to a position where the cushion block 6 is located below the second end of the main shaft 1, the hydraulic trolley 5 is controlled to lift the cushion block 6 so as to support the second end of the main shaft 1, the cushion block 6 is made of a rail wood, the rail wood spans between two lifting plates of the hydraulic trolley 5, and the rail wood is perpendicular to the two lifting plates of the hydraulic trolley 5. As shown in fig. 3, a groove 61 is formed on the pad 6, and the second end of the main shaft 1 is disposed in the groove 61. The groove 61 has a triangular cross-sectional shape. Alternatively, as shown in fig. 4, the cross-sectional shape of the groove 61 is circular arc.

s23, removing the connection fixing points of the bearing assembly in the bearing box to ensure that the bearing assembly is separated from the fixing of the bearing box shell 2;

s24, removing the main shaft 1 together with the bearing assembly from the bearing box shell 2, and then moving the main shaft 1 together with the bearing assembly to a position which does not influence the construction;

specifically, as shown in fig. 2, the hydraulic trolley 5 is pulled, and the hoisting part of the hoisting tool 4 is moved at the same time, so that the hydraulic trolley 5, the main shaft 1, the bearing assembly, and the hoisting part of the hoisting tool 4 move in the direction of the second end of the main shaft 1, and the main shaft 1 together with the bearing assembly is moved out of the bearing housing 2.

Then, a cushion block is prevented below the first end close to the main shaft 1 to support the first end of the main shaft 1, then the steel pipe 3 is taken down, and then the old main shaft 1 and the bearing assembly are hoisted to the position where construction is not affected;

s3, removing the main shaft 1 together with the bearing assembly in the new bearing box by the same method;

s4, loading the new spindle 1 with the bearing assembly into the old bearing housing 2;

specifically, the bearing assembly is installed on a new main shaft 1, a matched steel pipe 3 firstly penetrates through an old bearing box shell 2 and then is inserted into the first end of the new main shaft 1, and a hoisting machine 4 in a fan room is used for hoisting the steel pipe 3 so as to hoist the first end of the main shaft 1;

arranging a hydraulic trolley 5 at the second end of the new main shaft 1, placing a cushion block 6 on the hydraulic trolley 5, moving the hydraulic trolley 5 until the cushion block 6 is positioned below the second end of the new main shaft 1, and controlling the hydraulic trolley 5 to lift the cushion block 6 so as to support the second end of the main shaft 1;

in addition, in this step, a new bearing assembly and the main shaft 1 can be hoisted between the cushion block 6 and another cushion block of the hydraulic trolley 5, the bearing assembly and the main shaft 1 are supported by the two cushion blocks, namely, in a state shown in fig. 2, then the matched steel pipe 3 firstly penetrates through the old bearing box shell 2 and then is inserted into the first end of the new main shaft 1, the steel pipe 3 is hoisted by utilizing a hoisting tool 4 in a fan room, the first end of the main shaft 1 is hoisted, and then the cushion block close to the steel pipe 3 is taken down.

Moving the hydraulic trolley 5, and simultaneously moving the hoisting part of the hoisting tool 4, so that the hydraulic trolley 5, the new spindle 1, the bearing assembly and the hoisting part of the hoisting tool 4 move towards the old bearing box shell 2 in the same direction, and further moving the new spindle 1 and the bearing assembly into the bearing box shell 2, namely, in the state shown in fig. 1;

the new spindle 1 together with the bearing assembly is then fitted into the old bearing housing 2.

And s5, reinstalling the assembled bearing box into the air inlet box to complete the replacement of the bearing box.

Since the old bearing housing casing 2 is not generally damaged when the ventilator is actually operated, when the bearing housing is replaced by the above-described method, only the new spindle 1 together with the bearing assembly is installed into the old bearing housing casing 2, and the old bearing housing shell 2, which has been ground when it was first installed, can ensure its fit with the installation site, in the process of transforming the N-shaped hub of the main ventilator, the operation of a single ventilator needs to be carried out during the period of shutdown maintenance, under the condition of short construction period, the method can quickly finish the replacement of the bearing box, the whole replacement time is shorter than that of the prior art, in addition, the construction scheme has the advantages that in the process of changing the N-type hub into the B-type hub in a mining area, the bearing box is quickly replaced for the first time, and the scheme is feasible through demonstration guidance of manufacturers; the construction is rapid, the scheme effectively solves the problem that a large amount of time is consumed for installing and grinding a new bearing box in the transformation process, and saves time for rapidly realizing wheel hub transformation; the scheme can quickly solve the problem of replacement of the bearing box, shortens the time for transforming the hub of the whole ventilator, also shortens the time for operating a single fan, and provides effective guarantee for safe operation of the fan; the method has the advantages that the operability is realized, the operation is simple, and no additional construction tools are added except normal construction tools when the new main shaft and the bearing assembly are installed in the shell of the old bearing box; in addition, the whole operation takes about 3 hours, and the time consumption is shorter compared with the prior art. In addition, in terms of economic efficiency: the quick replacement effectively shortens the construction period, greatly saves the labor cost, and does not additionally increase auxiliary mechanical equipment and the like in the process change; in the aspect of social benefits: the application of the process effectively shortens the construction time, reduces the pressure for the operation of a single fan in the construction process, and provides guarantee for the safety production of mines.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.