CN218349792U

CN218349792U - Novel bearing vibration installation apron

Info

Publication number: CN218349792U
Application number: CN202222481216.7U
Authority: CN
Inventors: 张万林; 王俊涛; 王涛; 郎绪婷
Original assignee: Huaneng Hegang Power Generation Co ltd
Current assignee: Huaneng Hegang Power Generation Co ltd
Priority date: 2022-09-19
Filing date: 2022-09-19
Publication date: 2023-01-20
Anticipated expiration: 2032-09-19

Abstract

The utility model relates to a steam turbine technical field specifically discloses a novel bearing vibrates installation apron, including the lid that is used for sealed bearing, it has the probe mounting hole to open on the lid, and the symmetry is opened on the lid has a plurality of bolt fastening holes, and bolt fastening hole mills towards the direction that is close to the bearing boss, can dismantle in the probe mounting hole and be connected with the vibrations probe, is equipped with the installation component on the vibrations probe, and the installation component includes can dismantle with the vibrations probe be connected and with the fixed cover of probe mounting hole threaded connection and with installation cover threaded connection and be used for the processing nut of fixed vibrations probe, the utility model aims to solve traditional installation apron and cause the fragile problem of vibrations probe easily because the influence of bearing boss after the installation vibrations probe.

Description

Novel bearing vibration installation apron

Technical Field

The application relates to the technical field of steam turbines, and particularly discloses a novel bearing vibration installation cover plate.

Background

The steam turbine is also called as a steam turbine engine, and is a rotary steam power device.A high-temperature high-pressure steam passes through a fixed nozzle to become an accelerated airflow and then is sprayed onto blades, so that a rotor provided with blade rows rotates, and simultaneously, the rotor does work outwards. The steam turbine is the main equipment of modern thermal power factory, also is used for metallurgical industry, chemical industry, naval vessel power device, and the steam turbine need install the vibrations probe and monitor the bearing in the operation process, and the vibration is greater than the protection definite value and will trigger the trip signal to guarantee the timely stop of unit, prevent that its inside spare part from damaging.

The bearing of the vibration probe mounting area is provided with a boss, the transverse space is just enough for mounting the probe when the probe is mounted in a cold state, and the relative position of the boss on the bearing and the vibration probe is changed along with the change of expansion difference (the difference value of the relative expansion of a rotor and a cylinder of a steam turbine is habitually stipulated that the expansion difference when the expansion of the rotor is larger than that when the expansion of the cylinder is positive expansion difference, and vice versa, the expansion difference is negative expansion difference).

Accordingly, the present inventors have devised a novel bearing vibration mount cover plate to solve the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve traditional installation apron and cause the fragile problem of vibrations probe easily because the influence of bearing boss causes behind the installation vibrations probe.

In order to achieve the purpose, the utility model discloses a basic scheme provides a novel bearing vibration installation apron, including the lid that is used for sealed bearing, it has the probe mounting hole to open on the lid, the symmetry is opened on the lid has a plurality of bolt fastening hole, bolt fastening hole mills towards the direction that is close to the bearing boss, can dismantle in the probe mounting hole and be connected with the vibrations probe, be equipped with the installation component on the vibrations probe, the installation component include with vibrations probe detachable connection and with probe mounting hole threaded connection's fixed cover and with installation cover threaded connection and be used for the processing nut of fixed vibrations probe.

The principle and the effect of the basic scheme are as follows:

1. compared with the prior art, the utility model discloses be equipped with the lid, through the probe mounting hole that sets up on the lid, can be used for installing the vibrations probe to install the vibrations probe, and the vibrations probe is fixed through the installation component, can fix the vibrations probe through the processing nut in the installation component with fixed cover.

2. Compared with the prior art, the utility model discloses be equipped with a plurality of bolt fastening holes for fix the lid, compare for circular through-hole with current bolt fastening hole, the bolt fastening hole after milling mills towards the direction of boss, make the lid can carry out the removal of certain distance along the axial of bearing, in the installation to vibration probe, make vibration probe's bottom keep away from the bearing boss as far as possible, thereby can effectively avoid the bearing boss to cause vibration probe's damage at the in-process of work.

3. Compared with the prior art, the utility model discloses in through the bolt fastening hole that sets up, can be better meticulous and accurate to the installation of lid, can come to carry out the installation of different positions to the apron according to the signal and the size of vibrations probe for vibrations probe and bearing boss remain throughout at a safe distance, have ensured the normal work of vibrations probe, move the control that lasts to the bearing ground, have ensured the normal operating of unit.

4. Compared with the prior art, the utility model discloses in through the bolt fastening hole that sets up, ensured the good operation of vibrations probe, can not damage because of the relative movement between bearing and tile lid, improved the security of probe installation greatly, guaranteed important parameter's accuracy, reliability.

5. Compared with the prior art, the utility model can avoid the protection malfunction or the action rejection caused by the damage of the probe in the unit operation process through the bolt fixing hole and the probe mounting hole on the cover body, the malfunction can cause the unit to trip by mistake, the comprehensive loss is nearly 100 thousands and the one-time unit non-stop index; avoid the serious consequence of tens of millions of losses caused by serious equipment damage because the probe damages and does not send a protection action signal to cause protection rejection action if the bearing vibration reaches the protection fixed value according to the actual condition

Furthermore, the probe mounting hole is a mounting threaded hole and a positioning hole for positioning the vibration probe, and the mounting threaded hole can be in threaded connection with the fixed sleeve. The mounting threaded hole is in threaded connection with the fixing sleeve, and the positioning hole is used for positioning the vibration probe.

Furthermore, a positioning boss is arranged in the probe mounting hole. The location boss that sets up uses with the cooperation of processing nut can fix a position and fix shaking probe.

Further, the bolt fixing hole is formed by milling a circular through hole, the milling direction is the direction close to the boss, the milling radius is the same as the radius of the circular through hole, and the milling distance is larger than 5mm. Milling a certain distance towards the boss direction through the circular through hole can change the mounting position of the cover body, so that the boss is far away from the mounting of the vibration probe.

Further, the processing nut is a round nut with the diameter of 14mm, and chamfers are symmetrically arranged on the round nut. Because the mounting position of the cover body moves, the relative clearance between the cover plate and the tile mounting hole on the inner part is reduced, so that the mounted nut needs to be changed into a round nut with the diameter of 14mm, and symmetrical chamfering is carried out, so that the mounting and dismounting of the nut are facilitated.

Furthermore, a gasket is arranged between the processing nut and the bolt fixing hole. The arranged gasket can reduce the abrasion to the processing nut and prevent the processing nut from loosening after long-term use.

Further, the boss height is 3mm, the installation clearance between boss and the vibrations probe is 1.3mm. The installation clearance between boss and the vibrations probe is 1.3mm, can prevent through the installation clearance that the vibrations probe is very easily damaged.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a new bearing vibration installation cover plate before and after a cover body is modified according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram illustrating a mounting assembly in a novel bearing vibration mounting cover plate according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a new bearing vibration installation cover plate according to an embodiment of the present application before and after a nut is machined;

FIG. 4 is a schematic diagram illustrating a shock probe mounted in a novel bearing vibration mounting cover plate according to an embodiment of the present application;

FIG. 5 is an enlarged view of a new bearing vibration mounting cover plate according to an embodiment of the present application;

fig. 6 shows a schematic view of the installation of a probe in a new type of bearing vibration installation cover plate proposed in the embodiment of the present application.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the objects of the present invention, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

Reference numerals in the drawings of the specification include: the probe mounting structure comprises a cover body 1, a circular through hole 2, a bolt fixing hole 3, a probe mounting hole 4, a mounting threaded hole 401, a positioning boss 402, a positioning hole 403, a vibration probe 5, a fixing sleeve 6, a machining nut 7, a hexagon nut 8, a gasket 9, a bearing 10, a boss 11, a mounting gap 12, a cover body mounting hole 13 and a probe mounting space 14.

Examples are shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6:

the utility model provides a novel bearing vibration installation apron, includes lid 1, lid 1 is used for bearing 10 to install inside the steam turbine after, uses it to seal bearing 10, and there is boss 11 on the bearing 10, and boss 11 highly is 3mm, and it is installed in the inside tile of going up of steam turbine, and four bolt fastening hole 3 have been seted up to the surface symmetry of lid 1, as shown in figure 1, current bolt fastening's hole is circular through-hole 2, and is firmly fixed to the installation of lid 1, unable removal, and the utility model provides a bolt fastening hole 3 mills to the direction that is close to boss 11 for circular through-hole 2, and the distance of milling is greater than 5mm, and the effect of this step is at the in-process of installation lid 1 and can adjust the position of lid 1 for the probe is in-process of installation and is kept away from boss 11 as far as possible, has ensured the normal operating of vibrations probe 5, prevents that it from being damaged easily.

The middle part of the cover body 1 is provided with a probe mounting hole 4, the probe mounting hole 4 is divided into two parts, the upper part is provided with a mounting threaded hole 401, the lower part is provided with a positioning hole 403 for positioning the vibration probe 5, and a positioning boss 402 is processed inside the positioning hole so as to fix the vibration probe 5, the vibration probe 5 is mounted in the probe mounting hole 4 through a mounting assembly, as shown in fig. 2, the mounting assembly comprises a fixing sleeve 6 which is detachably connected with the vibration probe 5 and is in threaded connection with the probe mounting hole 4 and a processing nut 7 which is in threaded connection with the mounting sleeve and is used for fixing the vibration probe 5, a gasket 9 is arranged between the processing nut 7 and the probe mounting hole 4 so as to prevent the processing nut 7 from being excessively worn, as shown in fig. 3 and 4, the processing nut 7 adopts a round nut with a diameter of 14mm and is symmetrically provided with a chamfer, the vibration probe 5 is convenient to mount and dismount, while the existing fixing nut of the vibration probe 5 adopts a hexagon nut 8, the diagonal distance is 20mm, after the mounting position of the cover body 1 is changed, the processing nut 7 is difficult to be inserted into a gap, the processed, the radius of the processed nut 7 is reduced, and the chamfer can be more convenient to mount and dismount.

As shown in fig. 5 and 6, since the mounting position of the cover 1 is changed, the probe mounting space 14 is also changed at the overlapping portion of the probe mounting hole 4 and the cover mounting hole 13, and the mounting gap 12 between the bottom of the vibration probe 5 and the bearing 10 is 1.3mm during mounting and mounting of the vibration probe 5.

The method comprises the following specific implementation steps:

the first step is as follows: machining 4 bolt fixing holes 3, milling to the direction of the boss 11 by more than 5mm, and moving the cover plate to the direction far away from the boss 11 as much as possible during installation and fixing;

the second step is that: because the mounting cover plate moves, the relative clearance between the cover plate and the tile mounting hole on the inner part is reduced, the probe fastening hexagon nut with the diameter of 8 mm cannot be inserted into the gap, the nut is polished to form a circular nut with the diameter of 14mm (the diameter of the nut is equal to that of the probe extension rod), and the circular nut is chamfered, so that the fastening and the dismounting are convenient,

thirdly, mounting the vibration probe 5, mounting the fixed sleeve 6 on the vibration probe 5, inserting the fixed sleeve 6 into the probe mounting hole 4, connecting the fixed sleeve with the mounting threaded hole 401 in a threaded manner until the fixed sleeve is contacted with the positioning boss 402, fixing the vibration probe 5 by fixing the fixed sleeve 6 through the processing nut 7 and the gasket 9, finishing the fixation of the vibration probe 5, and enabling the distance between the bottom of the vibration probe 5 and the boss 11 of the bearing 10 to be 1.3mm.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed by the preferred embodiment, it is not limited to the present invention, and any person skilled in the art can make modifications or changes equivalent to the equivalent embodiments by utilizing the above disclosed technical contents without departing from the technical scope of the present invention, but all the modifications, changes and changes of the technical spirit of the present invention made to the above embodiments are also within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a novel bearing vibration installation apron which characterized in that: including the lid that is used for sealed bearing, it has the probe mounting hole to open on the lid, the symmetry is opened on the lid has a plurality of bolt fastening holes, bolt fastening hole mills towards the direction that is close to the bearing boss, can dismantle in the probe mounting hole and be connected with the vibrations probe, be equipped with the installation component on the vibrations probe, the installation component include with the vibrations probe can dismantle be connected and with the fixed cover of probe mounting hole threaded connection and with installation cover threaded connection and be used for fixed vibrations probe's processing nut.

2. The novel bearing vibration mounting cover plate as claimed in claim 1, wherein the probe mounting holes are mounting threaded holes and positioning holes for positioning the vibration probe, and the mounting threaded holes are capable of being in threaded connection with the fixing sleeve.

3. The novel bearing vibration mounting cover plate as claimed in claim 2, wherein a positioning boss is provided in the probe mounting hole.

4. The novel bearing vibration installation cover plate as claimed in claim 1, wherein the bolt fixing hole is milled by a round through hole, the milling direction is a direction close to the boss, the milling radius is the same as the radius of the round through hole, and the milling distance is more than 5mm.

5. The novel bearing vibration installation cover plate as claimed in claim 1, wherein the machining nut is a round nut with a diameter of 14mm, and chamfers are symmetrically arranged on the round nut.

6. The novel bearing vibration mounting cover plate as claimed in claim 5, wherein a gasket is arranged between the processing nut and the bolt fixing hole.

7. The new bearing vibration mounting cover plate as claimed in claim 1, wherein the boss height is 3mm and the mounting clearance between the boss and the vibration probe is 1.3mm.