CN210046482U

CN210046482U - Valve core grinding device for electric high-voltage valve

Info

Publication number: CN210046482U
Application number: CN201920643378.1U
Authority: CN
Inventors: 夏勇
Original assignee: Shenyang Hengke Electric Power Technology Development Co Ltd
Current assignee: Shenyang Hengke Electric Power Technology Development Co Ltd
Priority date: 2019-05-04
Filing date: 2019-05-04
Publication date: 2020-02-11
Anticipated expiration: 2029-05-04

Abstract

The utility model belongs to the technical field of valve processing, in particular to a valve core grinding device for an electric power high-pressure valve, which comprises a machine table and a driving motor fixed on one side of the machine table through a connecting frame, wherein a sleeve is fixed at the middle position of the upper end surface of the machine table, the inner side of the sleeve is rotatably connected with a transmission shaft through an upper bearing connecting part and a lower bearing connecting part, a grinding tool bit is fixed at the upper end of the transmission shaft, and a driven belt pulley is fixed at the bottom end of the transmission shaft; the utility model discloses a be equipped with bearing connection portion and lower bearing connection portion in the main shaft outside, and the upper bearing connection portion comprises tapered roller bearing and deep groove ball bearing, can be to axial support through tapered roller bearing, simultaneously because deep groove ball bearing's connection keeps the pivoted reliability between main shaft and the sleeve, effectual reduction frictional resistance, can guarantee the reliability of bearing in the sleeve inboard through this kind of structure, consequently reduce the possibility that the bearing takes place the deformation damage.

Description

Valve core grinding device for electric high-voltage valve

Technical Field

The utility model belongs to the technical field of the valve processing, especially, be a case grinder for electric power high pressure valve.

Background

Steam turbines, which are one of the major equipment in thermal power plants today, are used to drive generators to convert mechanical energy into electrical energy for use by consumers. The steam turbine has characteristics such as bulky rotation soon. When the turbine runs at high temperature, high pressure and high speed from a static state at normal temperature and normal pressure, the regulating valve of the turbine plays a key role in stabilizing the rotating speed and controlling the load. Only by controlling the stability, rapidity and accuracy of the valve well, the steam turbine can be operated safely, stably and efficiently.

The existing valve core grinding device needs to bear larger axial force in the grinding process, can cause dislocation of an inner ring and an outer ring of a bearing connected with a shaft in the long-term past, thereby causing displacement of a roller and larger damage to the bearing, and the bearing is in interference assembly, so that the disassembly and the installation are troublesome, and in case of damage, the time is considerably delayed.

SUMMERY OF THE UTILITY MODEL

To solve the problems set forth in the background art described above. The utility model provides a case grinder for electric power high pressure valve has the characteristics that the reliability is high.

In order to achieve the above object, the utility model provides a following technical scheme: a valve core grinding device for an electric high-pressure valve comprises a machine table and a driving motor fixed on one side of the machine table through a connecting frame, wherein a sleeve is fixed in the middle of the upper end face of the machine table, the inner side of the sleeve is rotatably connected with a transmission shaft through an upper bearing connecting part and a lower bearing connecting part, a grinding tool bit is fixed at the upper end of the transmission shaft, a driven belt wheel is fixed at the bottom end of the transmission shaft, a driving belt wheel is fixed at the output end of the driving motor, and the driving belt wheel and the driven belt wheel are in transmission connection through a transmission belt; the upper bearing connecting part comprises a tapered roller bearing and a deep groove ball bearing, a supporting step used for supporting the deep groove ball bearing is arranged on the sleeve, the tapered roller bearing is located on the upper end face of the deep groove ball bearing, and the deep groove ball bearing is located on the lower end face of the grinding cutter head.

Preferably, the tapered roller bearing comprises an upper bearing frame, a roller and a lower bearing frame, the upper bearing frame is connected to the outer wall of the transmission shaft in an interference manner, and the upper bearing frame is in sliding connection with the lower bearing frame through the roller.

Preferably, deep groove ball bearing includes bearing inner race, spin and bearing inner race, bearing inner race interference is connected the outer wall of transmission shaft, just the bearing inner race with pass through down between the bearing bracket spin sliding connection, the height of bearing inner race is less than the height of bearing inner race, just the upper and lower terminal surface of bearing inner race respectively in down bearing bracket and support step contact.

Preferably, the lower bearing frame is connected to the inner wall of the sleeve in an interference manner, and one end, far away from the sleeve, of the lower bearing frame is in clearance fit with the transmission shaft.

Preferably, the bottom of the machine table is fixed with supporting legs, and the bottoms of the supporting legs are connected with seat feet in a threaded mode.

Preferably, the lower bearing connecting part is a deep groove ball bearing and has the same structure as the tapered roller bearing.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a be equipped with bearing connecting portion and lower bearing connecting portion in the main shaft outside, and the upper bearing connecting portion comprises tapered roller bearing and deep groove ball bearing, can be to axial support through tapered roller bearing, simultaneously because deep groove ball bearing's connection, keep pivoted reliability between main shaft and the sleeve, effectual reduction frictional resistance, can guarantee the reliability of bearing in the sleeve inboard through this kind of structure, consequently, reduce the possibility that the bearing takes place to deform and damages, consequently, the quality of case processing has been improved, for reducing the coal-fired, fuel consumption, it lays good basis to reduce the steam turbine and have the accident risk.

Drawings

The accompanying drawings 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 invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of A of the present invention;

fig. 3 is a schematic structural diagram of the deep groove ball bearing of the present invention.

In the figure: 1. a machine platform; 11. supporting legs; 12. a connecting frame; 2. a sleeve; 21. supporting a step; 3. a drive shaft; 4. a drive motor; 51. a driving pulley; 52. a transmission belt; 53. a driven pulley; 6. an upper bearing connection portion; 61. a tapered roller bearing; 611. an upper bearing frame; 612. a roller; 613. a lower bearing bracket; 62. a deep groove ball bearing; 621. a bearing inner race; 622. rolling a ball; 623. a bearing outer race; 7. a lower bearing connection portion; 8. and grinding the tool bit.

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 some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1-3, the present invention provides the following technical solutions: a valve core grinding device for an electric high-pressure valve comprises a machine table 1 and a driving motor 4 fixed on one side of the machine table 1 through a connecting frame 12, wherein a sleeve 2 is fixed at the middle position of the upper end face of the machine table 1, the inner side of the sleeve 2 is rotatably connected with a transmission shaft 3 through an upper bearing connecting part 6 and a lower bearing connecting part 7, a grinding tool bit 8 is fixed at the upper end of the transmission shaft 3, a driven belt pulley 53 is fixed at the bottom end of the transmission shaft 3, a driving belt pulley 51 is fixed at the output end of the driving motor 4, and the driving belt pulley 51 is in transmission connection with the driven belt pulley; the upper bearing connecting part 6 comprises a tapered roller bearing 61 and a deep groove ball bearing 62, a supporting step 21 for supporting the deep groove ball bearing 62 is arranged on the sleeve 2, the tapered roller bearing 61 is positioned on the upper end face of the deep groove ball bearing 62, and the deep groove ball bearing 62 is positioned on the lower end face of the grinding cutter head 8.

In this embodiment: a driven belt wheel 53 is fixed at the bottom end of the transmission shaft 3, a driving belt wheel 51 is fixed at the output end of the driving motor 4, and the driving belt wheel 51 and the driven belt wheel 53 are in transmission connection through a transmission belt 52; driving motor 4 is the model commonly used in industrial production, driving motor 4 drives the driving pulley 51 of its output and rotates, driving pulley 51 passes through the transmission of drive belt 52, it rotates to drive driven pulley 53, consequently, it rotates to have driven transmission shaft 3, upper bearing connecting portion 6 includes tapered roller bearing 61 and deep groove ball bearing 62, offer the support step 21 that is used for supporting deep groove ball bearing 62 on the sleeve 2, tapered roller bearing 61 is located the up end of deep groove ball bearing 62, deep groove ball bearing 62 is located the lower terminal surface of grinding tool bit 8, when the case grinds on grinding tool bit 8, produce pressure downwards, and pressure transmits on tapered roller bearing 61, tapered roller bearing 61 supports grinding tool bit 8, keep pivoted reliability through deep groove ball bearing 62 simultaneously.

Specifically, the tapered roller bearing 61 includes an upper bearing frame 611, a roller 612 and a lower bearing frame 613, the upper bearing frame 611 is connected to the outer wall of the transmission shaft 3 in an interference manner, the upper bearing frame 611 is connected with the lower bearing frame 613 in a sliding manner through the roller 612, the deep groove ball bearing 62 includes a bearing inner ring 621, a rolling ball 622 and a bearing outer ring 623, the bearing inner ring 621 is connected to the outer wall of the transmission shaft 3 in an interference manner, the bearing inner ring 621 and the lower bearing frame 613 are connected in a sliding manner through the rolling ball 622, the height of the bearing inner ring 621 is smaller than that of the bearing outer ring 623, and the upper end surface and the lower end surface of the bearing outer ring 623 are respectively; the upper bearing bracket 611 is connected to the outer wall of the transmission shaft 3 in an interference manner, when the grinding cutter head 8 is pressed, the pressure moves downwards, the upper bearing bracket 611 is stressed, due to the inclined surface structure, the pressure is transmitted to the direction of the lower bearing bracket 613 through the roller 612, the lower bearing bracket 613 is in contact with the bearing outer ring 623, the bearing force is transmitted to the bearing outer ring 623, the bearing outer ring 623 is in contact with the supporting step 21 and is supported by the supporting step 21, stable and reliable support is formed, and in the process of transmitting the force, the bearing inner ring 621 does not bear axial force, so that the structural reliability of the deep groove ball bearing 62 can be ensured, and deformation damage is prevented.

Specifically, the lower bearing frame 613 is connected to the inner wall of the sleeve 2 in an interference manner, and one end of the lower bearing frame 613, which is far away from the sleeve 2, is in clearance fit with the transmission shaft 3; since the upper bearing holder 611 is in contact with and rotates along with the grinding bit 8, the lower bearing holder 613 needs to be reliably positioned without contacting the drive shaft 3 to reduce friction.

Specifically, the bottom of the machine table 1 is fixed with a supporting leg 11, and a seat is screwed at the bottom of the supporting leg 11; the height between the seat foot and the machine table 1 can be adjusted by rotating the seat foot at the bottom of the supporting leg 11, and the seat foot can be used for adjusting the stable state when the height of the supporting surface is not stable.

Specifically, the lower bearing connecting part 7 is a deep groove ball bearing and has the same structure as the tapered roller bearing 61; can be used to ensure the stability of the bottom of the transmission shaft 3.

The utility model discloses a theory of operation and use flow: the driving motor 4 drives the driving pulley 51 at the output end to rotate, the driving pulley 51 drives the driven pulley 53 to rotate through the transmission of the transmission belt 52, so that the transmission shaft 3 is driven to rotate, when the grinding tool bit 8 is pressed, the pressure moves downwards, the upper bearing frame 611 is stressed, due to the inclined surface structure, the pressure is transmitted to the direction of the lower bearing frame 613 through the roller 612, the lower bearing frame 613 is in contact with the outer bearing ring 623, so that the bearing capacity is transmitted to the outer bearing ring 623, the outer bearing ring 623 is in contact with the supporting step 21 and is supported by the supporting step 21, and stable and reliable support is formed.

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 modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. 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

1. The utility model provides a case grinder for electric power high pressure valve which characterized in that: the grinding machine comprises a machine table (1) and a driving motor (4) fixed on one side of the machine table (1) through a connecting frame (12), wherein a sleeve (2) is fixed at the middle position of the upper end face of the machine table (1), the inner side of the sleeve (2) is rotatably connected with a transmission shaft (3) through an upper bearing connecting part (6) and a lower bearing connecting part (7), a grinding tool bit (8) is fixed at the upper end of the transmission shaft (3), a driven belt wheel (53) is fixed at the bottom end of the transmission shaft (3), a driving belt wheel (51) is fixed at the output end of the driving motor (4), and the driving belt wheel (51) is in transmission connection with the driven belt wheel (53) through a transmission belt (52); the upper bearing connecting portion (6) comprises a tapered roller bearing (61) and a deep groove ball bearing (62), a supporting step (21) used for supporting the deep groove ball bearing (62) is arranged on the sleeve (2), the tapered roller bearing (61) is located on the upper end face of the deep groove ball bearing (62), and the deep groove ball bearing (62) is located on the lower end face of the grinding tool bit (8).

2. The valve element grinding device for the electric high-pressure valve according to claim 1, wherein: the tapered roller bearing (61) comprises an upper bearing frame (611), rollers (612) and a lower bearing frame (613), wherein the upper bearing frame (611) is connected to the outer wall of the transmission shaft (3) in an interference mode, and the upper bearing frame (611) is connected with the lower bearing frame (613) in a sliding mode through the rollers (612).

3. The valve element grinding device for the electric high-pressure valve according to claim 2, characterized in that: deep groove ball bearing (62) include bearing inner race (621), spin (622) and bearing outer ring (623), bearing inner race (621) interference is connected the outer wall of transmission shaft (3), just bearing inner race (621) with pass through between lower bearing bracket (613) spin (622) sliding connection, the height of bearing inner race (621) is less than the height of bearing outer ring (623), just the upper and lower terminal surface of bearing outer ring (623) do not in lower bearing bracket (613) and support step (21) contact.

4. The valve element grinding device for the electric high-pressure valve according to claim 2, characterized in that: the lower bearing frame (613) is in interference connection with the inner wall of the sleeve (2), and one end, far away from the sleeve (2), of the lower bearing frame (613) is in clearance fit with the transmission shaft (3).

5. The valve element grinding device for the electric high-pressure valve according to claim 1, wherein: the bottom of the machine table (1) is fixed with supporting legs (11), and the bottoms of the supporting legs (11) are connected with seat feet in a threaded mode.

6. The valve element grinding device for the electric high-pressure valve according to claim 1, wherein: the lower bearing connecting part (7) is a deep groove ball bearing and has the same structure as the tapered roller bearing (61).