CN210118172U

CN210118172U - Front bearing box

Info

Publication number: CN210118172U
Application number: CN201920737782.5U
Authority: CN
Inventors: 孟庆波; 杨少国; 郭金闯; 李睿
Original assignee: Shandong Qilu Motor Manufacturing Co Ltd
Current assignee: Shandong Qilu Motor Manufacturing Co Ltd
Priority date: 2019-05-20
Filing date: 2019-05-20
Publication date: 2020-02-28
Anticipated expiration: 2029-05-20

Abstract

The utility model discloses a front bearing box, including high-pressure servomotor and bearing structure, high-pressure servomotor adopts the oily control system that wear-resistants, and the oily control system that wear-resistants includes EH oil station and the oil that wear-resistants, and bearing structure includes bottom plate, bearing fender and front bearing box curb plate, and the bearing keeps off the outside and is provided with the step face, and bearing structure is still including supporting riser and support diaphragm, and the lower extreme of supporting riser is fixed on the bottom plate, supports the diaphragm and fixes in the upper end of supporting riser, supports the diaphragm upper surface and sets up the mounting hole. Compared with the prior art, the front bearing box high-pressure servomotor supporting structure is directly arranged on the bottom plate of the lower half box body of the front bearing box, the bottom plate is used as one part of the structure of the front bearing box, the structure is simple, the strength is high, the material consumption is low, the front bearing box high-pressure servomotor supporting structure can be used as a base of the cat-claw support and the servomotor, the processing is simple and convenient, and the manufacturing cost is low.

Description

Front bearing box

Technical Field

The utility model relates to a steam turbine technical field, concretely relates to front bearing case.

Background

The oil engine of the steam turbine is an important component of a steam turbine regulating system, is an actuating mechanism of a regulating and security system, and controls the opening and closing of a steam turbine valve by using steam turbine control oil, so that the aims of controlling the rotating speed and the load of a unit and protecting the safety of the unit are fulfilled.

When turbine oil is used as the turbine control oil, the oil motor is usually disposed inside the front bearing housing. When the oil for controlling the turbine adopts the anti-wear oil, the high-pressure oil engine does not need to use the main oil pump to provide the turbine oil for the turbine, and the position of the high-pressure oil engine can be selectively increased. However, when the servomotor is arranged beside the steam turbine, the base of the servomotor needs to be manufactured separately, and the occupied space is increased; when the servomotor is arranged on the upper cover of the front bearing box (as shown in figures 5-6), the thickness of the cover plate needs to be increased, and the cover plate needs to be reinforced by a rib plate, so that inconvenience is brought to overhaul, protection and the like of the front bearing box.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a front bearing case, this front bearing case high pressure servomotor bearing structure directly set up on front bearing case lower half box bottom plate, regard the bottom plate as a part of self structure, simple structure, intensity is big, and the use material is few, can regard as the base of preceding cylinder cat claw support and servomotor simultaneously to processing is simple and convenient, and the cost of manufacture is low.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model provides a front bearing box, includes high-pressure servomotor and bearing structure thereof, high-pressure servomotor adopts the oily control system that wear-resistants, the oily control system that wear-resistants includes EH oil station and the oil that wear-resistants, bearing structure includes bottom plate, bearing fender and front bearing case curb plate, the bearing keeps off the outside and is provided with the step face, bearing structure is still including supporting the riser and supporting the diaphragm, the lower extreme that supports the riser is fixed on the bottom plate, it fixes to support the diaphragm support the upper end of riser, it sets up the mounting hole to support the diaphragm upper surface. Compared with the prior art, the front bearing box high-pressure servomotor supporting structure is directly arranged on the bottom plate of the lower half box body of the front bearing box, the bottom plate is used as one part of the structure of the front bearing box, the structure is simple, the strength is high, the material consumption is low, the front bearing box high-pressure servomotor supporting structure can be used as a base of the cat-claw support and the servomotor, the processing is simple and convenient, and the manufacturing cost is low.

Preferably, the supporting vertical plate comprises a side supporting plate which is positioned at the edge of the bottom plate and is parallel to the front bearing box side plate, and a front supporting plate and a rear supporting plate which are positioned at two ends of the side supporting plate and are perpendicular to the front bearing box side plate. This setting can provide the support position that supports the diaphragm more, increases the structural strength of whole mechanism.

Preferably, the supporting riser further comprises a reinforcing plate located between the front bearing housing side plate and the side supporting plate and parallel to the side supporting plate. The reinforcing plate may further increase the structural strength of the overall mechanism.

Preferably, the side support plates, the front support plate and the rear support plate have the same height and are equal to the height of the step surface of the bearing baffle. This setting can rational utilization bearing keep off the part, reduces with the material to improve the stability of supporting the diaphragm.

Preferably, the height of the reinforcing plate is equal to the height of the step surface of the bearing block. This setting can strengthen the welding stability who supports the diaphragm.

Preferably, the supporting transverse plate is welded on the supporting vertical plate and is welded with the side plate of the front bearing box. This setting can the rational utilization front bearing case curb plate, reduces the material consumption.

Preferably, the supporting transverse plate is welded with the step surface of the bearing block. This setting can rational utilization bearing keep off, reduces the material consumption.

Preferably, the mounting holes on the upper surface of the supporting transverse plate are pin holes and threaded holes. This arrangement is used to secure the front cylinder dog and the high pressure servomotor.

The utility model also provides a transformation method aiming at the front bearing box,

1) removing a main oil pump, an original front bearing box, an oil engine bracket, an observation hole corresponding to an upper cover and an oil engine pull rod opening;

2) an EH oil station and the high-pressure servomotor supporting structure are additionally arranged;

3) the position of the high-pressure oil servomotor is changed from the oil servomotor bracket arranged in the original front bearing box to the high-pressure oil servomotor supporting structure

4) The oil inlet of the high-pressure oil engine is changed into an EH oil station from the outlet of the main oil pump;

5) the return oil of the high-pressure oil-operated machine is changed into an EH oil tank from a main oil pump inlet;

6) the oil source of the system is changed from turbine oil to antiwear oil.

The utility model discloses following beneficial effect has: this front bearing case high pressure servomotor bearing structure directly sets up on front bearing case lower half box bottom plate, regard as the partly of self structure with the box bottom plate, simple structure, and intensity is big, and the material used is few, can regard as the base of preceding cylinder cat claw support and servomotor simultaneously to processing is simple and convenient, and the cost of manufacture is low.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the servomotor support structure of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 is a schematic view of a bearing stop;

FIG. 5 is a top plan view of the front bearing housing of the prior art;

fig. 6 is a schematic view of direction a in fig. 5.

Description of reference numerals: 1-bottom plate, 2-bearing retainer, 21-bearing retainer step surface, 3-front bearing box side plate, 41-side support plate, 42-front support plate, 43-rear support plate, 44-reinforcing plate, 5-support transverse plate, 6-front bearing box lower half, 7-rib plate and 8-servomotor support.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.

The embodiment of the utility model provides a front bearing box, including high-pressure servomotor and bearing structure thereof, high-pressure servomotor adopts the oily control system that wear-resistants, the oily control system that wear-resistants includes EH oil station and the oil that wear-resistants, bearing structure is shown as 1 ~ 3, bottom plate 1 including the front bearing box, bearing fender 2 and front bearing box curb plate 3, the bearing keeps off 2 outside processing and has step face 21, the bearing keeps off 2 concrete structures as shown in figure 4, bearing structure still includes supporting riser and support diaphragm 5, the welding of supporting riser lower extreme is on front bearing box bottom plate 1, the welding of support diaphragm 5 is in the support riser upper end. Compare in the bearing structure who is located the front bearing case upper cover, as shown in fig. 5 ~ 6, this bearing structure is direct to be welded with the lower half box bottom plate of front bearing case, regard the box bottom plate as a part of self structure, can regard as the base of preceding cylinder cat claw support and servomotor simultaneously, and processing, preparation are simple and convenient, have reduced steel consumption.

In the structure, the supporting structure is provided with the supporting plates or the rib plates at the periphery and the middle part to enhance the structural strength. Specifically, the supporting riser includes a side supporting plate 41 located at the edge of the bottom plate 1 and parallel to the front bearing box side plate 3, and a front supporting plate 42 and a rear supporting plate 43 located at both ends of the side supporting plate 41 and perpendicular to the front bearing box side plate 3, and the supporting riser further includes a reinforcing plate 44 located between the front bearing box side plate 3 and the side supporting plate 41 and parallel to the side supporting plate 41. In order to provide a stable supporting surface for the supporting cross plate 5 and to provide a more stable welding, the side support plates 41, the front support plates 42 and the rear support plates 43 have the same height as the bearing stopper step surface 21, and the reinforcing plate 44 has the same height as the bearing stopper step surface 21. Then the supporting transverse plate 5 is welded on the supporting vertical plate, the side surface is welded with the front bearing box side plate 3, and the contact part of the supporting transverse plate 5 and the bearing baffle step surface 21 is welded and fixed. Finally, mounting holes are machined in the upper surface of the supporting transverse plate 5, and specifically, pin holes and threaded holes are machined for fixing the front cylinder cat claw and the high-pressure oil engine, wherein the upper surface is flat and has no steps, so that the cat claw can be formed at the same time during machining, and the machining amount is reduced.

When turbine oil is used, oil inlet and outlet ports of the high-pressure oil engine are arranged on the oil engine base in the bearing box, and oil is fed from an outlet of the main oil pump and returned to an inlet of the main oil pump. When the oil is wear-resistant, the oil inlet of the high-pressure oil engine comes from the EH oil station and returns to the EH oil tank. When turbine oil is replaced by antiwear oil, the front bearing box changes according to the position change of the oil engine, and the front bearing box and the oil engine change in position mainly caused by the oil source change of the oil engine. The change of the wear-resistant oil front box relative to the turbine oil front box is that after the oil motor is out of the machine, an observation hole and an opening of an oil motor pull rod corresponding to an oil motor bracket and an upper cover in the front box are removed. The volume of the front box body is greatly reduced, and compared with the built-in hydraulic servomotor, the front box body does not need to be opened, is convenient to overhaul, and is flexible and changeable in arrangement position. The oil pressure is stable and reliable due to the independent oil source.

The utility model also provides a transformation method to above-mentioned front bearing case, it is specific: 1) removing a main oil pump, an original front bearing box, an oil engine bracket, an observation hole corresponding to an upper cover and an oil engine pull rod opening; 2) an EH oil station and the high-pressure servomotor supporting structure are additionally arranged; 3) the position of the high-pressure oil servomotor is changed from an oil servomotor bracket arranged in an original front bearing box to a high-pressure oil servomotor supporting structure; 4) the oil inlet of the high-pressure oil engine is changed into an EH oil station from the outlet of the main oil pump; 5) the return oil of the high-pressure oil-operated machine is changed into an EH oil tank from a main oil pump inlet; 6) the oil source of the system is changed from turbine oil to antiwear oil.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims

1. A front bearing box is characterized in that: including high-pressure servomotor and bearing structure thereof, high-pressure servomotor adopts the oily control system that wear-resistants, the oily control system that wear-resistants includes EH oil station and the oil that wear-resistants, bearing structure includes bottom plate (1), bearing fender (2), preceding bearing box curb plate (3), bearing structure is still including supporting riser and support diaphragm (5), the lower extreme that supports the riser is fixed on bottom plate (1), support diaphragm (5) are fixed support the upper end of riser, support diaphragm (5) upper surface and set up the mounting hole.

2. The front bearing housing of claim 1, wherein: the bearing keeps off (2) the outside and is provided with step face (21), support the riser including being located bottom plate (1) edge, with collateral branch fagging (41) that preceding bearing box curb plate (3) is parallel and be located collateral branch fagging (41) both ends, with preceding bearing box curb plate (3) vertically preceding fagging (42) and back fagging (43).

3. The front bearing housing of claim 2, wherein: the supporting vertical plate further comprises a reinforcing plate (44) which is positioned between the front bearing box side plate (3) and the side supporting plate (41) and is parallel to the side supporting plate (41).

4. The front bearing housing of claim 2, wherein: the side supporting plates (41), the front supporting plate (42) and the rear supporting plate (43) are the same in height and are equal to the height of the bearing baffle step surface (21).

5. The front bearing housing of claim 3, wherein: the height of the reinforcing plate (44) is equal to that of the bearing stop step surface (21).

6. The front bearing housing of claim 1, wherein: the supporting transverse plate (5) is welded on the supporting vertical plate and is welded with the front bearing box side plate (3).

7. The front bearing housing of claim 1, wherein: the supporting transverse plate (5) is welded with the bearing block step surface (21).

8. The front bearing housing of claim 1, wherein: the mounting holes in the upper surface of the supporting transverse plate (5) are pin holes and threaded holes.