CN212614907U

CN212614907U - Fixing device for vibration probe

Info

Publication number: CN212614907U
Application number: CN202021356470.9U
Authority: CN
Inventors: 邓仁青; 龙开靓; 赵哲; 付乐东
Original assignee: State Power Investment Group Jiangxi Electric Power Engineering Co ltd
Current assignee: State Power Investment Group Jiangxi Electric Power Engineering Co ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2021-02-26
Anticipated expiration: 2030-07-10

Abstract

The utility model discloses a fixing device of vibration probe relates to rotary equipment technical field, including head fixer and fixed buckle, the head fixer is used for fixed main part, fixed buckle is used for fixed extension line, it includes first flat board, the arc board, second flat board and first fastening screw, the both ends of arc board respectively with first flat board, second flat board rigid coupling, and all be equipped with first through-hole on first flat board and the second flat board, first flat board and second flat board all laminate mutually with the protruding edge of axle bush, first fastening screw runs through first through-hole and screw in axle bush protruding edge in, the extension line is located between arc board and the protruding edge of axle bush. So set up, solved the problem that the vibration probe mounting means of steam turbine among the prior art reduced vibration probe measurement accuracy.

Description

Fixing device for vibration probe

Technical Field

The utility model relates to a rotating equipment technical field, more specifically say, relate to a fixing device of vibration probe.

Background

The steam turbine is a rotary steam power device, high-temperature high-pressure steam passes through a fixed nozzle to become accelerated airflow and then is sprayed onto blades, so that a rotor provided with a blade row rotates and does work outwards. The vibration of the steam turbine during operation is harmful and can damage a bearing or equipment, so the vibration is a key index and needs real-time detection and protection, and the authenticity and the stability of the monitoring of a vibration measuring point are related to whether the protection is mistaken or refused. Generally can be through setting up vibration probe on the axle bush at the steam turbine, vibration probe generally includes main part and extension line, and the mechanical change signal of perception is converted into the signal of telecommunication by vibration probe and exports to steam turbine external terminal case.

However, in most of the prior art, the vibration probe of the steam turbine is installed in a manner that the main body part of the vibration probe is fixed on the bearing bush, the extension line of the vibration probe is led out to the external terminal box of the steam turbine, and after the cover of the bush is covered, when the steam turbine is in operation, the rotor rotates, the driven lubricating oil washes the extension line part of the vibration probe in the cover of the bush, the vibration probe is easy to be pulled, and then abnormal signal fluctuation and even broken line damage occur, which affects the accuracy of measurement of the vibration probe.

Therefore, how to solve the problem that the installation mode of the vibration probe of the steam turbine in the prior art reduces the measurement accuracy of the vibration probe becomes an important technical problem to be solved by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a vibrating probe's fixing device, its problem of having solved the mounting means and reducing vibrating probe measurement accuracy of installation of vibrating probe of the steam turbine among the prior art. The utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a pair of fixing device of vibration probe, include:

a head holder for fixing the body;

the fixing buckle is used for fixing an extension line and comprises a first flat plate, an arc plate, a second flat plate and a first fastening screw, wherein two ends of the arc plate are fixedly connected with the first flat plate and the second flat plate respectively, first through holes are formed in the first flat plate and the second flat plate, the first flat plate and the second flat plate are attached to the convex edge of the bearing bush, the first fastening screw penetrates through the first through holes and is screwed into the convex edge of the bearing bush, and the extension line is located between the arc plate and the convex edge of the bearing bush.

Preferably, the fixing buckle is arranged close to the outer edge of the convex edge of the bearing bush.

Preferably, the fixing catch is provided adjacent to the head holder.

Preferably, the length of the fixing buckle is 30mm-50mm, and the width of the fixing buckle is 10mm-18 mm.

Preferably, the length of the fixing buckle is 40mm, the width of the fixing buckle is 14mm, the chord length of the cross section of the arc plate is 14mm, and the diameter of the first through hole is 6 mm.

Preferably, the arc plate and the bearing convex edge are in pressure contact with the extension line.

Preferably, the first plate, the arc plate and the second plate are integrally formed.

Preferably, the head holder includes a third flat plate, a fourth flat plate, a second fastening screw and a probe nut, the third flat plate is fixedly connected to the fourth flat plate, the third flat plate is disposed near the curved surface of the bearing bush, the fourth flat plate is attached to the convex edge of the bearing bush, a second through hole is disposed on the fourth flat plate, the second fastening screw penetrates through the second through hole and is screwed into the convex edge of the bearing bush, a probe hole is disposed on the third flat plate, the probe nut is engaged with the circumferential thread of the main body, the main body penetrates through the probe hole and is in contact with the curved surface of the bearing bush, and the probe nut is in threaded connection with the main body and is attached to the third flat plate.

Preferably, when the axis of the bearing bush is horizontally arranged, the included angle between the shortest connecting line between the main body part and the axis of the bearing bush and the horizontal plane is 45 °.

Preferably, the number of the probe nuts is two, and the two probe nuts are respectively located on two sides of the third flat plate and are in pressure contact with the third flat plate.

The utility model provides a technical scheme in, the head fixer fixes the main part of the vibration probe at the position that contacts with the axle bush, fixed buckle includes first flat board, the second flat board, the arc board and first fastening screw, be used for fixing the extension line of vibration probe, wherein, form the fixed connection relation between first flat board, the second flat board and the arc board, the extension line of vibration probe passes from the sunken of arc board, first through-hole is all equipped with on first flat board and the second flat board, cooperate first fastening screw to run through first through-hole and screw in the axle bush protruding edge, and then fix first flat board and second flat board to the axle bush protruding edge, the line body position of the extension line of vibration probe that is located in the tile cover part is also fixed, the motion of turbine lubricating oil during operation can't erode the position that changes the extension line of vibration probe, avoided the vibration probe to receive to drag, the accuracy of the measurement of the vibration probe is ensured. So set up, solved the problem that the vibration probe mounting means of steam turbine among the prior art reduced vibration probe measurement accuracy.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of a fixing device of a vibration probe and a bearing bush in an embodiment of the present invention;

fig. 2 is a schematic structural view of a fixing device of a vibration probe according to an embodiment of the present invention;

fig. 3 is a schematic structural view of the fixing buckle in the embodiment of the present invention.

In fig. 1-3:

1. a head holder; 2. fixing the buckle; 3. a main body portion; 4. an extension line; 5. a bearing bush convex edge; 6. a bearing bush curved surface; 11. a third plate; 12. a fourth plate; 13. a second fastening screw; 14. a probe nut; 21. a first plate; 22. an arc plate; 23. a second plate; 24. a first fastening screw; 25. a first via.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of 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.

An object of this embodiment is to provide a fixing device for a vibration probe, which can solve the problem that the mounting manner of the vibration probe of a steam turbine in the prior art reduces the measurement accuracy of the vibration probe.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.

Referring to fig. 1 to 3, the fixing device for a vibration probe provided in this embodiment includes a head holder 1 and a fixing buckle 2, wherein, the head fixer 1 is used for fixing the main body part 3 of the vibration probe, the fixing buckle 2 is used for fixing the extension line 4 of the vibration probe, the fixing buckle 2 specifically comprises a first flat plate 21, an arc plate 22, a second flat plate 23 and a first fastening screw 24, two ends of the arc plate 22 are respectively fixedly connected with the first flat plate 21 and the second flat plate 23, and the first flat plate 21 and the second flat plate 23 are both provided with a first through hole 25, the first flat plate 21 and the second flat plate 23 are both attached to the ring surface of the convex edge 5 of the bearing bush, the inner arc surface of the arc plate 22 is opposite to the convex edge 5 of the bearing bush, a first fastening screw 24 penetrates through the first through hole 25 and is screwed into the convex edge 5 of the bearing bush, the extension 4 is located between the arc plate 22 and the bearing boss 5, and its end leaves the bearing and penetrates into the turbine external terminal box.

According to the arrangement, the head fixer 1 fixes the main body part 3 of the vibration probe at the position contacting with the bearing bush, the fixing buckle 2 comprises a first flat plate 21, a second flat plate 23, an arc plate 22 and a first fastening screw 24 for fixing the extension line 4 of the vibration probe, wherein the first flat plate 21, the second flat plate 23 and the arc plate 22 form a fixed connection relationship, the extension line 4 of the vibration probe passes through the recess of the arc plate 22, the first flat plate 21 and the second flat plate 23 are both provided with a first through hole 25, the first through hole 25 is matched with the first fastening screw 24 to pass through and screw into the convex edge 5 of the bearing bush, so that the first flat plate 21 and the second flat plate 23 are fixed on the convex edge 5 of the bearing bush, the position of the part of the extension line 4 of the vibration probe, the movement of the turbine line body lubricating oil can not flush and change the position of the extension line 4 of the vibration probe when the turbine operates, the vibration probe is prevented from being dragged, the measurement accuracy of the vibration probe is guaranteed, and the problem that the measurement accuracy of the vibration probe is reduced by the installation mode of the vibration probe of the steam turbine in the prior art is solved. Moreover, because of the partial fixed position that is located the tile lid of vibrating probe's extension line 4, vibrating probe's main part 3 does not receive to drag and draws, has consolidated its stability, simultaneously, can prevent that the steam turbine from appearing the protection because of the vibration and interdynamic or refusing to move and causing serious equipment accident, is favorable to thermal power unit's safety and stability to operate.

The first fastening screw 24 is preferably a socket head cap screw having a relatively large fastening force and not easily slipping.

It should be noted that the bearing bush convex edge 5 is arranged around the bearing bush curved surface 6, the bearing bush curved surface 6 is a cylindrical side surface of the bearing bush, and the cross section of the bearing bush convex edge 5 is in a circular ring shape.

Further, can select fixed buckle 2 to be close to the protruding outward flange setting along 5 of axle bush, because extension line 4 through fixed buckle 2 after, draw forth and to keep away from the axle bush before probably having a part line body, so can reduce vibrating probe's extension line 4 and the distance between the pivoted axle to the at utmost, prevent the production of scraping wearing and tearing, protect the line body of extension line 4 and the axis body of axis of rotation.

In order to better prevent the extension line 4 of the vibration probe from being dragged and displaced due to the flushing of lubricating oil, the fixing buckle 2 can be selected to be arranged close to the head fixer 1, and the distance between the head fixer 1 and the fixing buckle 2 is short, so that the extension line 4 can be arranged close to the annular surface of the bearing bush convex edge 5, the extension line 4 is further ensured not to be dragged, and the fixing reliability is enhanced.

As a specific embodiment, the length of the fixing clip 2 may be set to 30mm to 50mm, and the width thereof may be set to 10mm to 18mm, the length of the fixing clip 2 specifically refers to the sum of the sizes of the first flat plate 21, the arc plate 22 and the second flat plate 23 in the connecting direction, and the width direction of the fixing clip 2 specifically refers to the direction perpendicular to the length direction of the fixing clip 2 and parallel to the annular surface of the bearing convex edge 5, that is, the widths of the connecting portion of the first flat plate 21 and the arc plate 22 and the connecting portion of the arc plate 22 and the second flat plate 23 are equal. Preferably, the length of the fixing buckle 2 is 40mm, the width of the fixing buckle is 14mm, the chord length of the cross section of the arc plate 22 is 14mm, and the diameter of the first through hole 25 is 6 mm.

The material of the fixing buckle 2 is preferably made of hard and durable stainless steel.

In addition, in order to enhance the stability of fixing the extension 4 of the vibration probe, it is preferable to provide the arc plate 22 and the bearing convex edge 5 both in pressure contact with the extension 4, and to provide a sponge on the contact surface of the arc plate 22 with the extension 4, thereby protecting the extension 4 while reinforcing it.

As a preferred embodiment, the first flat plate 21, the arc plate 22 and the second flat plate 23 may be alternatively provided to be integrally formed.

As a specific embodiment, the head holder 1 may be configured to include a third flat plate 11, a fourth flat plate 12, a second fastening screw 13 and a probe nut 14, wherein the third flat plate 11 is fixedly connected to the fourth flat plate 12 vertically, i.e. the third flat plate 11 and the fourth flat plate 12 are connected to each other to form an L-shape, the third flat plate 11 is disposed near the curved surface 6 of the bearing bush, the fourth flat plate 12 is attached to the convex edge 5 of the bearing bush, the fourth flat plate 12 is provided with a second through hole, the second fastening screw 13 penetrates the second through hole and is screwed into the convex edge 5 of the bearing bush, preferably, two second fastening screws 13 and two second through holes are provided, the third flat plate 11 is provided with a probe hole, the main body 3 of the vibration probe generally has an external thread in the circumferential direction, the internal thread of the probe nut 14 is matched with the external thread of the main body 3, the main body 3 penetrates the probe hole and is in contact with the curved surface 6 of the bearing, the probe nut 14 is attached to the third flat plate 11, thereby fixing the main body 3 of the vibration probe.

Further, it is preferable that the probe nuts 14 are provided in two, and the two probe nuts 14 are respectively located on both sides of the third flat plate 11 and are in pressure contact with the third flat plate 11, so that the main body portion 3 of the vibration probe can be reinforced.

More specifically, when the axis of the bearing bush is horizontally disposed, an angle between a shortest connecting line between the main body portion 3 and the axis of the bearing bush and a horizontal plane may be selected to be 45 ° so as to measure vibrations in the X direction and the Y direction.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments. The utility model provides a plurality of schemes contain the basic scheme of itself, mutual independence to restrict each other, but it also can combine each other under the condition of not conflicting, reaches a plurality of effects and realizes jointly.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vibration probe fixture, comprising:

a head holder (1) for fixing the body section (3);

the fixing buckle (2) is used for fixing an extension line (4) and comprises a first flat plate (21), an arc plate (22), a second flat plate (23) and a first fastening screw (24), two ends of the arc plate (22) are fixedly connected with the first flat plate (21) and the second flat plate (23), the first flat plate (21) and the second flat plate (23) are respectively provided with a first through hole (25), the first flat plate (21) and the second flat plate (23) are respectively attached to a bearing bush convex edge (5), the first fastening screw (24) penetrates through the first through hole (25) and is screwed into the bearing bush convex edge (5), and the extension line (4) is located between the arc plate (22) and the bearing bush convex edge (5).

2. A mounting arrangement for a vibrating probe according to claim 1, characterised in that the mounting clip (2) is located adjacent the outer edge of the bearing flange (5).

3. A fixing device of a vibrating probe according to claim 2, characterized in that said fixing catch (2) is arranged close to said head holder (1).

4. A fixing device of a vibrating probe according to claim 1, characterized in that the fixing catch (2) has a length of 30mm to 50mm and a width of 10mm to 18 mm.

5. A vibrating probe fixture as claimed in claim 4, characterised in that the fixing clip (2) has a length of 40mm and a width of 14mm, the arc plate (22) has a cross-section with a chord length of 14mm, and the first through hole (25) has a diameter of 6 mm.

6. A mounting arrangement for a vibrating probe according to claim 1, characterised in that the arc plate (22) and the bearing flange (5) are in pressure contact with the extension (4).

7. A mounting arrangement for a vibrating probe, as claimed in claim 1, characterised in that said first plate (21), said arc plate (22) and said second plate (23) are formed in one piece.

8. A device for fixing a vibrating probe as claimed in claim 1, wherein the head holder (1) comprises a third plate (11), a fourth plate (12), a second fastening screw (13) and a probe nut (14), the third plate (11) is fixedly connected to the fourth plate (12), the third plate (11) is disposed near the curved surface (6) of the bearing bush, the fourth plate (12) is attached to the convex edge (5) of the bearing bush, the fourth plate (12) is provided with a second through hole, the second fastening screw (13) passes through the second through hole and is screwed into the convex edge (5) of the bearing bush, the third plate (11) is provided with a probe hole, the probe nut (14) is engaged with the circumferential thread of the main body (3), the bearing bush (3) passes through the probe hole and is in contact with the curved surface (6), the probe nut (14) is in threaded connection with the main body (3) and is attached to the third plate (11) .

9. A mounting arrangement for a vibrating probe, as claimed in claim 8, in which the axis of the bearing shell is arranged horizontally, the shortest connecting line between the main body portion (3) and the axis of the bearing shell is at an angle of 45 ° to the horizontal.

10. A fixing device of a vibrating probe as claimed in claim 8, characterised in that said probe nut (14) is provided in two, respectively located on both sides of said third plate (11) and in pressure contact with said third plate (11).