CN217735590U - Temperature measuring element mounting structure of thrust bearing of water supply pump steam turbine - Google Patents

Abstract

The utility model discloses a temperature element mounting structure of feed pump steam turbine thrust bearing, including installing the temperature element on thrust bearing, the temperature measurement line is drawn forth to the temperature element upper end, and the temperature measurement line is drawn forth from sealing joint, runs through during the clearance that the upper bearing lid got into between bearing case lid and the upper bearing lid, is located the upper bearing of temperature measurement element line extraction position and covers and be equipped with sealing joint, and the temperature measurement line is drawn forth from the L venturi tube of installing in bearing case lid and bearing case department of meeting along the clearance between bearing case lid and the upper bearing lid. The utility model discloses an improve temperature element mounting structure and avoid causing the damage to the temperature measurement line when covering because of the upper bearing cap buckle or even fracture. A sealing joint is additionally arranged at the position of the upper bearing cover opening to realize a first sealing process; the temperature measuring line is led out from the front box in an L-shaped pipe outgoing mode, and the front and the rear of the threading hole are plugged by the sealing joints and the sealant, so that a second sealing process is realized, and the oil seepage quantity of the outgoing line of the temperature element is further reduced.

Description

Temperature measuring element mounting structure of thrust bearing of water supply pump steam turbine

Technical Field

The utility model relates to a bearing body field, concretely relates to temperature element mounting structure of feed pump steam turbine thrust bearing.

Background

A temperature measuring line of a thrust bearing of a water supply pump steam turbine is led out through a narrow wire slot on a bearing cover, a hole is formed in the wall of a bearing box, the hole is sealed by sealant, and the lead-out wire is led into a junction box outside the bearing box after being processed, so that the following problems mainly exist at present.

1. The wire casing on the bearing cap is narrower, it is very difficult to ensure that the temperature measuring wire can be completely placed in the wire casing when the bearing cap is buckled, the edge of the wire casing is sharp, and the wire casing is easily pressed on the leading-out wire of the temperature element of the thrust bearing, so that the leading-out wire is abraded and even broken. On one hand, the temperature can not be displayed normally, and the operating personnel can not monitor the working state of the water supply pump turbine normally, even the water supply pump turbine trips because of the temperature jump of the bearing. On the other hand, because the temperature measuring line is worn, lubricating oil leaks from the bearing temperature measuring wire core, the leakage condition cannot be blocked, the temperature measuring component can only be replaced by stopping the machine, and great fire safety hazards exist during the operation of the unit.

2. The pressure of the lubricating oil at the opening of the wall of the bearing box is larger, gaps exist between the extension lines, the plugging effect is poor, and the oil leakage amount is larger and larger along with the lapse of time.

Disclosure of Invention

To the deficiency of the prior art, the utility model aims to provide a temperature measurement element mounting structure of feed pump steam turbine thrust bearing.

The utility model discloses a realize above-mentioned purpose, adopt following technical scheme:

the temperature measuring element mounting structure of the thrust bearing of the water supply pump steam turbine in the technical scheme comprises a temperature measuring element mounted on the thrust bearing, wherein a temperature measuring line is led out from the upper end of the temperature measuring element, is led out from a sealing joint and penetrates through an upper bearing cover to enter a gap between a bearing box cover and the upper bearing cover, the upper bearing cover at the temperature measuring line leading-out part of the temperature measuring element is provided with the sealing joint, and the temperature measuring line is led out from an L-shaped pipe mounted at the joint of the bearing box cover and the bearing box along the gap between the bearing box cover and the upper bearing cover.

Preferably, in the technical scheme, the sealing joint comprises a first joint and a second joint, the second joint is arranged in a threading hole in the upper bearing cover, so that a temperature measuring wire penetrates through the second joint, the upper end of the second joint is connected with the first joint through threads, one part of the first joint extends into the upper bearing cover to be connected with the second joint, and the other part of the first joint is arranged in a gap between the bearing cover and the upper bearing cover.

Preferably, in the above technical solution, the L-shaped tube includes a transverse portion connecting the inner and outer portions of the bearing box cover and a longitudinal portion located in the bearing box cover and aligned with a gap between the bearing box cover and the upper bearing cover, one end of the transverse portion is connected to the upper end of the longitudinal portion, the temperature measurement line enters the L-shaped tube from the lower end of the longitudinal portion and penetrates out from the other end of the transverse portion of the L-shaped tube, and the other end of the transverse portion is provided with a sealing joint.

Preferably, in the above technical solution, there are four temperature measuring elements.

In the above technical scheme, preferably, the outlet end of the L-shaped pipe is sealed with the sealant by using the sealing joint.

Compared with the prior art, the utility model provides a temperature element mounting structure of feed pump steam turbine thrust bearing possesses following beneficial effect:

1. the damage and even the fracture of the temperature measuring wire caused by the cover buckling of the upper bearing cover can be avoided.

2. A sealing joint is additionally arranged at the position of the upper bearing cover opening to realize a first sealing process; and the thrust bearing temperature measuring line is led out from the front box by using an outlet mode of an L-shaped pipe, and the threading hole is blocked by using a sealing joint and sealant, so that a second sealing process is realized, and the oil seepage quantity of the temperature element outgoing line is further reduced.

Drawings

FIG. 1 is a schematic structural view of the temperature measuring element mounting structure of the thrust bearing;

FIG. 2 is a schematic view of a temperature element mounting location;

FIG. 3 is a schematic view of portion B of FIG. 1;

in the figure: the temperature measuring device comprises a thrust bearing 1, a bearing box cover 2, an upper bearing cover 3, a temperature measuring element 4, a sealing joint 5, a joint 51, a joint 52, a joint II, an L-shaped pipe 6, a transverse part 61, a longitudinal part 62 and a temperature measuring line 7.

Detailed Description

It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance. Are used solely to distinguish one from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The invention will be further explained with reference to the following figures and examples:

as shown in fig. 1-2, the embodiment of the utility model provides a temperature measurement element mounting structure for water pump steam turbine thrust bearing, including installing the temperature measurement element 4 on thrust bearing 1, temperature measurement line 7 is drawn forth to temperature measurement element 4 upper end, temperature measurement line 7 is drawn forth from sealing joint 5, runs through in the clearance that upper bearing cover 3 got into between bearing case lid 2 and the upper bearing cover 3, causes the damage to temperature measurement line 7 extension line when avoiding because of the upper bearing cover 3 buckle closure, is located be equipped with sealing joint 5 on the upper bearing cover 3 at temperature measurement line 7 extraction position of temperature measurement element 4, further seal temperature measurement line 7, temperature measurement line 7 is drawn forth from the L venturi tube 6 of installing in bearing case lid 2 and bearing case department of meeting along the clearance between bearing case lid 2 and the upper bearing cover 3.

In order to better implement the utility model, one of them, sealing joint 5 includes No. one joint 51 and No. two joints 52, no. two joints 52 locate the through-wire hole that is located upper bearing cap 3, make thermoscope 7 pass from No. two joints 52, no. two joints 52 upper end is through threaded connection No. one joint 51, no. one joint 51 some stretches into upper bearing cap 3 and is connected with No. two joints 52, and a part is arranged in the clearance of bearing case lid 2 and upper bearing cap 3. The sealing effect of the sealing joint 5 avoids the situation that the temperature measuring line 7 can be completely placed in the wire slot due to the fact that the wire slot on the upper bearing cover 3 is narrow and small when the cover is buckled, so that the temperature measuring line 7 is abraded, lubricating oil leaks from the wire core of the temperature measuring line 7, the temperature measuring line 7 is further protected, and the service life of the temperature measuring line 7 is prolonged.

In order to better implement the utility model, one of them, after the hole is opened in upper bearing cap 3, temperature measuring line 7 of thrust bearing 1 can't be drawn from the original through wires hole, so use L-shaped pipe 6 to draw the extension line of temperature measuring line 7 in the front box, L-shaped pipe 6 includes horizontal part 61 connecting the inside and outside part of bearing box cover 2 and vertical part 62 aligning the clearance between bearing box cover 2 and upper bearing cap 3 and being located in bearing box cover 2, horizontal part 61 one end with vertical part 62 upper end is connected, temperature measuring line 7 gets into L-shaped pipe 6 from vertical part 62 lower extreme, and wears out from the horizontal part 61 other end of L-shaped pipe 6, the other end of horizontal part 61 is equipped with sealing joint 5. The outlet end of the L-shaped pipe 6 is sealed with the sealant by the sealing joint 5, and the outlet mode of the L-shaped pipe 6 not only avoids the scouring of lubricating oil with larger pressure on the threading hole, but also greatly reduces the amount of lubricating oil which possibly leaks under the action of gravity.

In order to better implement the utility model, one of the temperature measuring elements 4 is four.

In conclusion, the original temperature measuring line leading-out mode is changed by improving the mounting structure of the temperature measuring element, the leaked lubricating oil quantity can be reduced under the action of gravity, and meanwhile, the lubricating oil with higher pressure is prevented from scouring the threading hole through the mounting of the L-shaped pipe; and the oil leakage condition is further reduced by sealing the two sealing joints of the temperature measuring line.

In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The above embodiments are only used to illustrate the technical solution of the present invention, and do not limit the protection scope of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from these embodiments without any inventive step, are within the scope of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still make no creative work on the condition of conflict, and make mutual combination, addition and deletion, or other adjustments according to the features in the embodiments of the present invention, thereby obtaining other technical solutions which are different and do not depart from the concept of the present invention, and these technical solutions also belong to the scope to be protected by the present invention.

Claims (5)

1. The temperature measuring element mounting structure of the thrust bearing of the water feed pump steam turbine is characterized by comprising a temperature measuring element (4) mounted on a thrust bearing (1), wherein a temperature measuring line (7) is led out from the upper end of the temperature measuring element (4), the temperature measuring line (7) is led out from a sealing joint (5), penetrates through an upper bearing cover (3) and enters a gap between a bearing box cover (2) and the upper bearing cover (3), the sealing joint (5) is arranged on the upper bearing cover (3) at the leading-out part of the temperature measuring line (7) of the temperature measuring element (4), and the temperature measuring line (7) is led out from an L-shaped pipe (6) mounted at the joint of the bearing box cover (2) and the bearing box along the gap between the bearing box cover (2) and the upper bearing cover (3).

2. The temperature measuring element mounting structure of the thrust bearing of the feed water pump steam turbine according to claim 1, wherein the sealing joint (5) comprises a first joint (51) and a second joint (52), the second joint (52) is arranged in a threaded hole on the upper bearing cover (3) so that the temperature measuring wire (7) passes through the second joint (52), the upper end of the second joint (52) is connected with the first joint (51) through threads, and a part of the first joint (51) extends into the upper bearing cover (3) to be connected with the second joint (52) and a part of the first joint is arranged in a gap between the bearing cover (2) and the upper bearing cover (3).

3. The structure for mounting a temperature measuring element of a thrust bearing of a water feed pump steam turbine according to claim 1, wherein the L-shaped pipe (6) comprises a transverse portion (61) connecting the inner and outer portions of the bearing housing cover (2) and a longitudinal portion (62) located in the bearing housing cover (2) and aligning a gap between the bearing housing cover (2) and the upper bearing housing (3), one end of the transverse portion (61) is connected to the upper end of the longitudinal portion (62), the temperature measuring wire (7) enters the L-shaped pipe (6) from the lower end of the longitudinal portion (62) and passes out from the other end of the transverse portion (61) of the L-shaped pipe (6), and the other end of the transverse portion (61) is provided with the sealing joint (5).

4. The structure for mounting a temperature measuring element for a thrust bearing of a feed pump steam turbine as claimed in claim 1, wherein said temperature measuring elements (4) are four in number.

5. The structure for mounting a temperature measuring element of a thrust bearing of a feed pump steam turbine as claimed in claim 1, wherein the outlet end of the L-shaped pipe (6) is sealed with a sealant by a sealing joint (5).

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