CN214091982U

CN214091982U - Barring piece and barring assembly

Info

Publication number: CN214091982U
Application number: CN202023351778.7U
Authority: CN
Inventors: 高嵩
Original assignee: China Resources Power Hubei Co Ltd
Current assignee: China Resources Power Hubei Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-08-31
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a barring spare and barring subassembly, wherein, the barring spare includes: a rocker arm; the turning gear body is provided with an accommodating space for accommodating the end part of the turning gear rotating shaft, the accommodating space is provided with an opening for inserting the end part of the turning gear rotating shaft, the turning gear body is provided with at least one driving notch communicated with the opening, and the driving notch is used for being clamped on a driving pin shaft on the turning gear rotating shaft; the driving notch comprises a driving wall and a slip-off wall which are oppositely arranged, and the slip-off wall extends obliquely in the direction away from the driving wall in the direction towards the opening. The utility model discloses the barring spare that technical scheme provided can break away from in a flexible way when the barring rotational speed reaches the setting value, avoids barring spare to hinder people's problem because of inertia whipping.

Description

Barring piece and barring assembly

Technical Field

The utility model relates to a steam turbine barring field, in particular to barring spare and barring subassembly.

Background

The barring part is an important auxiliary device for the operation of the steam turbine, and when the steam turbine is started to rush to rotate or is stopped, the rotor needs to rotate for a certain time at a low rotating speed so as to ensure the uniform temperature rise or the uniform temperature reduction of the rotor and avoid the thermal bending of the rotor. When the steam turbine set normally works, the electric barring device is responsible for barring, and when the steam turbine is overhauled or the electric barring fails to work, the manual barring piece is responsible for intervening in the operation of the steam turbine, so that the rotor rotates at a low rotating speed for a certain time.

In the prior art, a worker often uses a pipe wrench as a manual turning piece, and the pipe wrench is used for clamping and breaking a turning shaft of a steam turbine to perform manual turning. At the moment, the pipe tongs clamp the shaft of the seizing disc, the shaft of the barring gear reaches the set rotating speed but the pipe tongs cannot be timely and flexibly separated, and the accident risk that the pipe tongs injure people due to the inertia whipping of the sudden loosening is easily caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a barring spare, aim at promoting the barring spare and reach the reliability of setting for the rotational speed after the rotational speed of barring axle, nimble, light departure barring axletree.

In order to achieve the above object, the utility model provides a barring spare is used for driving the barring pivot of steam turbine and rotates, the barring spare includes:

a rocker arm; and

the turning gear body is provided with an accommodating space for accommodating the end part of the turning gear rotating shaft, the accommodating space is provided with an opening for inserting the end part of the turning gear rotating shaft, the turning gear body is provided with at least one driving notch communicated with the opening, and the driving notch is used for being clamped on a driving pin shaft on the turning gear rotating shaft;

the driving notch comprises a driving wall and a slip-off wall which are oppositely arranged, and the slip-off wall extends obliquely in the direction away from the driving wall in the direction towards the opening.

Optionally, the range of the inclination angle of the slip-off wall relative to the direction toward the opening is: 30 to 80.

Optionally, the driving wall is provided with a concave arc surface.

Optionally, the barring gear body is cylindrically arranged.

Optionally, the barring gear body comprises at least two tabs and a connecting beam connected between the two tabs, and the rocker arm is connected with the tabs and/or the connecting beam.

Optionally, the swing arm includes a hand holding portion and a connecting portion connected between the hand holding portion and the barring device body, and an extending direction of the connecting portion intersects with a rotation axis of the barring device body.

Optionally, the connecting portion is provided with a reinforcing structure at a position connected with the hand grip portion and/or the barring body.

Optionally, the turning gear is made of steel.

The utility model also provides a turning gear assembly, which comprises a steam turbine and the turning gear; the steam turbine is provided with a turning rotating shaft, and the peripheral surface of the turning rotating shaft is convexly provided with at least one driving pin shaft.

Optionally, the driving pin shaft is provided as a cylindrical pin.

The utility model discloses among the technical scheme, through pushing away and/or drawing a set car spare rocking arm when the workman, the barring spare drives the barring pivot and rotates together, makes the barring pivot from zero rotational speed with higher speed to the state of settlement rotational speed. At the moment, the worker can control the rotating speed of the barring part to be smaller or reverse relative to the rotating speed of the barring rotating shaft so as to enable the driving pin shaft to be separated from the driving wall and smoothly slide to the opening along the slipping wall, and then the driving pin shaft is thoroughly separated from the driving notch. At the moment, a worker can easily take the barring part off the barring rotating shaft, and the problem that the pipe tongs in the prior art hurts people due to swinging of inertia from seizure to sudden loosening is avoided.

Drawings

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

FIG. 1 is a schematic structural view of an embodiment of a barring component of the present invention;

FIG. 2 is a bottom view of the barring component of FIG. 1;

FIG. 3 is a left side view of the barring component of FIG. 1;

FIG. 4 is a schematic view of the assembled disk unit and steam turbine of FIG. 1;

FIG. 5 is a schematic structural view of another embodiment of the barring article of the present invention;

FIG. 6 is a front view of the assembly of FIG. 4;

FIG. 7 is a left side view of the assembly of FIG. 4;

FIG. 8 is a cross-sectional view of the assembly of FIG. 6 at A-A;

FIG. 9 is an enlarged view of a portion of the assembly of FIG. 7 at B.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Barring piece	11；11＇	Barring body
11a	Accommodating space		11b					Opening of the container
				111	Drive notch	111a	Driving wall
111b	Slide-off wall	12	Rocker arm
				121	Connecting part	122	Hand holding part
123	Reinforcing structure	20	Steam turbine
				21	Steam turbine body	22	Turning gear rotating shaft
23	Driving pin shaft

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

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 efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

When workers clamp and break the turning gear rotating shaft of the steam turbine to perform manual turning to a set rotating speed by using the pipe tongs, the pipe tongs clamp and seize the turning gear rotating shaft at the moment and cannot be timely and flexibly separated from the turning gear rotating shaft, and the accident risk that the pipe tongs injure people due to inertia whipping caused by sudden loosening is easily caused. In view of this, the utility model provides a barring ware, referring to fig. 1 to 4, in an embodiment of the present invention, this barring ware 10 is used for driving the barring pivot 22 rotation of steam turbine 20, and this barring ware 10 includes:

a rocker arm 12; and

the turning gear body 11 is provided with an accommodating space 11a for accommodating the end part of the turning gear rotating shaft, the accommodating space is provided with an opening 11b for inserting the end part of the turning gear rotating shaft 22, the turning gear body 11 is provided with at least one driving notch 111 communicated with the opening 11b, and the driving notch 111 is used for clamping a driving pin shaft 23 arranged on the turning gear rotating shaft 22;

the driving notch 111 includes a driving wall 111a and a slip-off wall 111b disposed opposite to each other, and the slip-off wall 111b extends obliquely in a direction away from the driving wall 111a in a direction toward the opening 11 b.

The utility model discloses among the technical scheme, when the workman through push away and/or draw the rocking arm 12 of barring spare 10, barring spare 10 drives barring pivot 22 and rotates together, makes barring pivot 22 accelerate to the settlement rotational speed from zero rotational speed. At this time, the worker may control the rotation speed of the barring component 10 to be smaller or reverse to the rotation speed of the barring rotation shaft 22, so as to disengage the driving pin 23 from the driving wall 111a and smoothly slide along the slipping wall 111b to the opening 11b, and then the driving pin 23 completely disengages from the driving notch 111. At this time, the worker can easily take the barring member 10 off the barring rotating shaft 22, and the problem that the pipe wrench in the prior art hurts people due to the fact that the pipe wrench is thrown from seizure to sudden loosening by inertia is avoided.

Generally, the rotation speed of the driver turning plate 10 is not more than 10r/min, and the torque applied to the driving notch 111 of the turning plate 10 and the driving pin 23 of the turning shaft 22 is small. Alternatively, two drive notches 111 are provided, and correspondingly two drive pins 23 are also provided. However, the design is not limited thereto, and in other embodiments, the number of the driving notches 111 may be three or four, or even more, so as to be adaptively applied to different working scenarios.

In this embodiment, optionally, the range of the inclination angle of the slipping wall 111b relative to the direction toward the opening 11b is: from 30 ° to 80 °, for example 55 °, 60 °, 65 °, or 70 °, etc. The inclination angle herein refers to an angle between a tangential direction of a midpoint of the slip-off wall 111b and a direction toward the opening 11 b. Generally, the sliding wall 111b is disposed in a plane, and the tangential direction of the midpoint is the length direction of the sliding wall 111 b. Of course, the slide-off wall 111b may be a curved surface, such as a convex curved surface facing the driving notch 111.

Referring to fig. 1 and 2, in this embodiment, in order to improve the overall structural strength of the barring component body 11, optionally, the barring component body 11 is in a cylindrical shape, so that the barring component body 11 can be conveniently processed to form the accommodating space 11a, the manufacturing cost of the barring component body 11 can be effectively reduced, even a round pipe with a common specification in the market can be directly purchased as a semi-finished product, and then the driving notch 111 is processed. However, the design is not limited thereto, and in other embodiments, the barring gear body 11 may also be provided in a polygonal cylinder shape or an elliptical cylinder shape.

Referring to fig. 5, alternatively, in other embodiments, the barring gear body 11' may also be a structure including at least two tabs and a connection beam connected between the two tabs, the rocker arm being connected with the tabs and/or the connection beam. Of course, the cylindrical barring gear body 11 has a more stable structure and higher rigidity and strength than the barring gear body 11' formed by the sheet structure and the beam.

Referring to fig. 8, in this embodiment, further, the accommodating space 11a is disposed coaxially with the turning gear rotating shaft 22, and the two driving pins 23 may be designed to be the same product, so that the semi-finished driving pins 23 are easy to manage, the manufacturing quality of the turning gear rotating shaft 22 is easy to control, and the manufacturing cost of the turning gear rotating shaft 22 is further reduced.

Further, the difference value range between the inner diameter of the accommodating space 11a and the radius of the turning shaft 22 is: 2mm to 10 mm. The turning member body 11 is in clearance fit with the turning rotating shaft 22, so that the turning member 10 and the turning rotating shaft 22 are sleeved and separated, and the operation of workers is more convenient. However, the gap value is set to be too large, which causes the length of the driving pin shaft 23 to be too large, and is not favorable for the structural stability of the driving pin shaft 23; if the clearance value is too small, the requirement on the machining precision of the two parts is high, and the manufacturing cost of the parts is not favorably controlled. However, the design is not limited thereto, and in other embodiments, the difference between the inner diameter of the accommodating space 11a and the radius of the turning shaft 22 may be set to be 1mm, or 12mm, 15mm, or 20 mm.

Referring to fig. 6 and 7, in the present embodiment, in order to make the line contact of the driving pin 23 with the barring component 10 and the driving notch 111 thereon smoother, the driving pin 23 may be alternatively configured as a cylindrical pin, and the driving pin 23 may generally extend along the radial direction or the near radial direction of the barring rotation shaft 22. When the cylindrical pin is in sliding connection with different parts on the barring component 10, the cylindrical pin slides in continuous and gentle line contact, so that the sliding connection is smoother, and the pause and contusion feeling of the barring component 10 during use is reduced. However, the design is not limited thereto, and in other embodiments, the driving pin 23 may be configured as an elliptical pin or a polygonal pin.

Referring to fig. 8, in the present embodiment, further, the cylindrical pin penetrates through the turning shaft 22 along the radial direction of the turning shaft 22, two ends of the cylindrical pin both have a free section 23a penetrating through the turning shaft 22, and the free section 23a is clamped in the driving notch 111. The turning rotating shaft 22 is provided with a through hole capable of accommodating the cylindrical pin, and then the cylindrical pin penetrates through the turning rotating shaft 22. However, the present invention is not limited to this, and in other embodiments, one end of the cylindrical pin may be welded to the outer circumferential wall surface of the turning shaft 22.

Referring to fig. 9, in the present embodiment, optionally, the driving wall 111a is disposed in a concave arc surface. The sliding connection of the cylindrical pin in the driving notch 111 can be smoother. Further optionally, a part of the wall surface of the driving wall 111a is set to be a cylindrical surface with the same radius as the cylindrical pin, and the cylindrical surface is attached to the cylindrical pin, so that the abutting area of the cylindrical pin and the driving wall 111a is increased, the risk of plastic deformation of the abutting area of the cylindrical pin is reduced, and the service life of the cylindrical pin is prolonged.

Referring to fig. 6, in the present embodiment, in order to make it more comfortable and labor-saving for the worker to drive the barring item 10, optionally, the swing arm 12 includes a grip portion 122 and a connecting portion 121 connected between the grip portion 122 and the body of the barring item 10, and the extending direction of the connecting portion 121 intersects with the rotation axis of the barring item 10; generally, the connecting portion 121 is disposed in a longitudinal direction perpendicular and approximately perpendicular to the rotational axis of the turning gear 10, and the grip portion 122 is disposed in an axial direction parallel and approximately parallel to the rotational axis of the turning gear 10. The length direction of the connecting part 121 is perpendicular or nearly perpendicular to the rotation axis of the turning gear 10, so that the whole length of the connecting part 121 can be used as a driving arm, the driving arm is maximized, and the driving force required by corresponding workers can be minimized; the axial direction of the holding part 122 is parallel and nearly parallel to the rotation axis of the barring device 10, so that the holding direction is in a natural state when a worker stands for operating, the operating posture is in a comfortable state, and the fatigue of the continuous barring is favorably reduced. Furthermore, the grip part 122 can be sleeved with an elastic anti-slip rubber sleeve to prevent the palm of the worker and the grip part 122 from slipping; further, the length of the grip portion 122 is set to be greater than the radius of the steam turbine body 21, so that a worker can stand off the steam turbine body 21 when turning the vehicle, and the influence of radiation heat generated by the operation of the steam turbine 20 is reduced.

Referring to fig. 1 to 3, in the present embodiment, optionally, the connecting portion 121 is provided with a reinforcing structure 123 at a position connected with the hand grip portion 122 and/or the barring body 11. The reinforcing structure 123 can provide a good reinforcing effect for the connection between the parts, particularly the structural strength in the force transmission direction, and improve the service life of the trailer 10. Further optionally, the reinforcing structure 123 includes triangular ribs spaced apart along the circumference of the hand grip portion 122, triangular ribs spaced apart along the circumference of the turning gear body 11.

In this embodiment, in order to ensure the rigidity and strength of the barring component 10 at a low cost and prolong the service life of the barring component 10, the material of the barring component 10 is optionally steel, such as Q195 steel, Q235 steel, Q460 steel, and the like. However, the design is not limited thereto, and in other embodiments, the material of the barring component 10 may also be an alloy material with higher rigidity and strength.

The utility model also provides a turning gear component, which comprises a steam turbine and the turning gear; the steam turbine is provided with a turning rotating shaft, and the peripheral surface of the turning rotating shaft is convexly provided with at least one driving pin shaft. The specific structure of the barring component refers to the above embodiments, and since the barring component adopts all technical solutions of all the above embodiments, all beneficial effects brought by the technical solutions of the above embodiments are at least achieved, and are not repeated here.

The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A turning gear for driving a turning shaft of a steam turbine in rotation, the turning gear comprising:

a rocker arm; and

2. The barring element of claim 1 wherein the angle of inclination of the run-off wall relative to the direction towards the opening ranges from: 30 to 80.

3. The barring element of claim 1 wherein the driving wall is concavely curved.

4. The barring gear of claim 1 wherein the barring gear body is cylindrically configured.

5. The barring gear of claim 1 wherein the barring gear body comprises at least two tabs and a connecting beam connected between the two tabs, the rocker arm being connected to the tabs and/or the connecting beam.

6. The barring gear of claim 1 wherein said rocker arm includes a hand grip portion and a connecting portion connected between said hand grip portion and said barring gear body, said connecting portion extending in a direction transverse to an axis of rotation in which said barring gear operates.

7. The barring gear of claim 6 wherein the connecting portion is provided with a reinforcing structure at a location of connection with the hand gripping portion and/or the barring gear body.

8. Barring element according to any of the claims 1 to 7, characterized in that the material of the barring element is provided as steel.

9. A barring component comprising a steam turbine and a barring component as claimed in any one of claims 1 to 8; the steam turbine is provided with a turning rotating shaft, and the peripheral surface of the turning rotating shaft is convexly provided with at least one driving pin shaft.

10. The barring assembly of claim 9 wherein the drive pin is configured as a cylindrical pin.