Generator set bearing bush temperature detection structure

Abstract

The utility model discloses a generator set bearing bush temperature detection structure, and relates to the field of steam turbine detection equipment, and the generator set bearing bush temperature detection structure comprises a bearing bush fixing seat, the inner wall of the bearing bush fixing seat is provided with a mounting hole, the end face of the bearing bush fixing seat is provided with a temperature measurement hole, and the temperature measurement hole is formed along the axial direction of the bearing bush fixing seat and is communicated with the mounting hole. A thermocouple signal transmission line penetrates through the temperature measuring hole, one end of the thermocouple signal transmission line extends out of the bearing bush fixing seat, the other end of the thermocouple signal transmission line extends into the mounting hole and is connected with a thermocouple probe, and an elastic piece sleeves the thermocouple signal transmission line and is positioned in the mounting hole; the elastic piece comprises a small gasket, a pressure spring and a large gasket which are sequentially sleeved on the thermocouple signal transmission line, the inner diameter of the small gasket is smaller than the outer diameter of the thermocouple probe, and the small gasket is positioned between the thermocouple probe and the pressure spring. The thermocouple probe can be prevented from being damaged in the steam turbine overhauling process.

Description

Technical Field

[0001] This application relates to the field of steam turbine detection equipment, and in particular to a bearing temperature detection structure for a generator set. Background Art

[0002] Due to friction between the high-speed rotating shaft of the small machine and the bearing, a large amount of heat is generated. Once the temperature of the bearing is too high, it will cause the phenomenon of bearing burning, and ultimately lead to bearing damage. The damaged bearing cannot provide good support and guiding functions, and thus it is difficult for the shaft of the small machine to maintain high-speed and stable rotation. Measuring the temperature of the bearing of the small machine and understanding its working conditions are beneficial to the stable operation of the steam turbine.

[0003] The currently commonly used bearing temperature detection structure is as follows: drill holes in the side wall of the bearing fixing seat, place the thermocouple in the hole and make it contact with the inner wall of the hole, then inject resin into the hole. After the resin solidifies, the thermocouple is relatively fixed to the bearing fixing seat. During use, the steam turbine shaft rotates at a high speed, frictions with the bearing and generates heat. The temperature of the bearing will be transmitted to the bearing fixing seat, and the thermocouple contacts the bearing fixing seat to detect the temperature of the bearing.

[0004] After the bearing is used for a long time, the wear intensifies and it needs to be replaced and overhauled. Among them, for the overhaul of the thermocouple, only the violent removal method can be adopted, which is extremely easy to cause damage to the thermocouple. Utility Model Content

[0005] In order to avoid damage to the thermocouple during the overhaul of the steam turbine, this application provides a bearing temperature detection structure for a generator set.

[0006] The bearing temperature detection structure for a generator set provided by this application adopts the following technical solution:

[0007] A bearing temperature detection structure for a generator set includes a bearing fixing seat. An installation hole is provided in the inner wall of the bearing fixing seat, and a temperature measurement hole is provided in the end face of the bearing fixing seat. The temperature measurement hole is axially provided along the bearing fixing seat, and the temperature measurement hole communicates with the installation hole. A thermocouple signal transmission line is penetrated in the temperature measurement hole. One end of the thermocouple signal transmission line extends out of the bearing fixing seat, and the other end extends into the installation hole and is connected with a thermocouple probe. An elastic member for pressing the thermocouple probe against the inner wall of the installation hole is sleeved on the thermocouple signal transmission line, and the elastic member is located in the installation hole; the elastic member includes a small washer, a compression spring and a large washer which are sequentially sleeved on the thermocouple signal transmission line. The inner diameter of the small washer is smaller than the outer diameter of the thermocouple probe, and the small washer is located between the thermocouple probe and the compression spring.

[0008] By adopting the above technical solution, during installation, put a small washer, a compression spring and a large washer on the thermocouple signal transmission line. Then insert the end of the thermocouple signal transmission line far from the thermocouple probe into the temperature measurement hole through the installation hole. After the end of the thermocouple signal transmission line far from the thermocouple probe passes through the temperature measurement hole, pull it out. Pull the thermocouple signal transmission line outwards, and the length of the compression spring is compressed. Then insert the head of the thermocouple probe into the retention hole. Finally, install a wire clamp on the end face of the bearing housing fixing seat to fix the thermocouple signal transmission line. During disassembly, just operate in the reverse direction. The thermocouple probe is detachably arranged to avoid damaging the thermocouple probe during the overhaul of the steam turbine.

[0009] Preferably, a retention hole is provided on the inner wall of the installation hole on the bearing housing fixing seat. The retention hole is coaxially arranged relative to the temperature measurement hole, and the end of the thermocouple probe far from the thermocouple signal transmission line is inserted into the retention hole.

[0010] By adopting the above technical solution, the installation stability of the thermocouple probe is improved.

[0011] Preferably, a braided shielding wire sleeve is sleeved outside the thermocouple signal transmission line.

[0012] By adopting the above technical solution, signal interference is reduced.

[0013] Preferably, the installation hole is a round hole or a straight slot.

[0014] By adopting the above technical solution, the installation hole is a round hole or a straight slot, and the original hole of the bearing housing fixing seat can be used for operation, thus reducing the secondary processing of the bearing housing fixing seat.

[0015] Preferably, the bearing housing fixing seat is provided with an inclined slot at the opening of the retention hole to facilitate the removal of the thermocouple probe.

[0016] By adopting the above technical solution, the inclined slot is used to guide the thermocouple probe to slide out of the installation hole, improving the convenience of disassembly.

[0017] Preferably, the installation hole is a blind hole, and a metal spring piece for pushing the thermocouple probe towards the inclined slot is fixed in the installation hole.

[0018] By adopting the above technical solution, the metal spring piece is used to push out the thermocouple probe, further improving the convenience of disassembly.

[0019] Preferably, a wire clamp for fixing the thermocouple signal transmission line is threadedly connected to the end face of the bearing housing fixing seat.

[0020] By adopting the above technical solution, the thermocouple signal transmission line is fixed by the wire clamp, avoiding the problem that the thermocouple probe has poor contact due to the thermocouple signal transmission line being pulled.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. The thermocouple probe is detachably arranged to avoid damaging the thermocouple probe during the overhaul of the steam turbine;

[0023] 2. The thermocouple signal transmission line is fixed by a wire clamp to avoid the problem that the thermocouple signal transmission line is pulled, resulting in poor contact of the thermocouple probe;

[0024] 3. The installation hole is a round hole or a straight slot, and the hole originally provided by the bearing pedestal can be used for operation, thereby reducing the secondary processing of the bearing pedestal;

[0025] 4. With the help of the inclined slot and the metal spring piece, the thermocouple probe can be taken out only by pulling out the thermocouple signal transmission line externally, further improving the convenience of disassembly. Description of the Drawings

[0026] Figure 1 It is a schematic diagram of the overall structure of a bearing temperature detection structure of a generator set according to Embodiment 1 of the present application;

[0027] Figure 2 It is a partial cross-sectional view at the installation hole in Embodiment 1 of the present application;

[0028] Figure 3 It is a schematic diagram of the overall structure of a bearing temperature detection structure of a generator set according to Embodiment 2 of the present application;

[0029] Figure 4 It is a partial cross-sectional view at the installation hole in Embodiment 2 of the present application;

[0030] Reference numerals: 1, bearing pedestal; 2, installation hole; 3, temperature measurement hole; 4, thermocouple signal transmission line; 5, thermocouple probe; 6, compression spring; 7, small washer; 8, large washer; 9, retention hole; 10, inclined slot; 11, wire clamp; 12, bearing slot; 13, metal spring piece; 14, braided shield wire sleeve. Detailed Description of the Embodiments

[0031] The following will further describe the present application in detail with reference to the attached Figures 1 - 4 drawings.

[0032] Embodiment 1 of the present application discloses a bearing temperature detection structure of a generator set.

[0033] Embodiment 1

[0034] Refer to Figure 1 and Figure 2A bearing temperature detection structure for a generator set includes a bearing fixing seat 1, the bearing fixing seat 1 is C-shaped, a bearing groove 12 for installing a bearing is opened on the inner wall of the bearing fixing seat 1, and a mounting hole 2 is also opened on the inner wall of the bearing fixing seat 1. The mounting hole 2 is located on one side of the bearing groove 12. The mounting hole 2 is a round hole or a straight slot. The mounting hole 2 passes through the bearing fixing seat 1 along the radial direction of the bearing fixing seat 1. A temperature measuring hole 3 is opened on the end surface of the bearing fixing seat 1. The temperature measuring hole 3 is a round hole. The temperature measuring hole 3 is opened along the axial direction of the bearing fixing seat 1. The temperature measuring hole 3 and the mounting hole 2 is connected, a thermocouple signal transmission line 4 is passed through the temperature measuring hole 3, one end of the thermocouple signal transmission line 4 extends out of the bearing fixing seat 1, and the other end extends into the mounting hole 2 and is connected with a thermocouple probe 5, an outer sleeve of the thermocouple signal transmission line 4 is provided with a braided shielding wire sleeve 14, and the end face of the bearing fixing seat 1 is threadedly connected with a wire clamp 11 for fixing the thermocouple signal transmission line 4, and the wire clamp 11 is a U-shaped metal sheet, and an elastic member for abutting the thermocouple probe 5 against the inner wall of the mounting hole 2 is sleeved on the thermocouple signal transmission line 4, and the elastic member is located in the mounting hole 2.

[0035] Reference Figure 1 and Figure 2 The elastic member includes a small washer 7, a compression spring 6 and a large washer 8 which are sequentially sleeved on the thermocouple signal transmission line 4. The inner diameter of the small washer 7 is smaller than the outer diameter of the thermocouple probe 5. The small washer 7 is located between the thermocouple probe 5 and the compression spring 6.

[0036] A retaining hole 9 is opened on the inner wall of the mounting hole 2 on the bearing fixing seat 1. The retaining hole 9 is coaxially arranged relative to the temperature measuring hole 3. One end of the thermocouple probe 5 away from the thermocouple signal transmission line 4 is inserted into the retaining hole 9.

[0037] The implementation principle of the bearing temperature detection structure of a generator set in the embodiment of the present application is as follows: first, the bearing is installed in the bearing groove 12, and then the two bearing fixing seats 1 are relatively locked, the turbine shaft rotates at a high speed, rubs against the bearing and generates heat, and the heat is transferred to the bearing fixing seat 1, the thermocouple probe 5 abuts against the inner wall of the mounting hole 2, detects the temperature of the bearing fixing seat 1, and outputs the temperature information through the thermocouple signal transmission line 4;

[0038] During installation, a small washer 7, a compression spring 6 and a large washer 8 are put on the thermocouple signal transmission line 4, and then the end of the thermocouple signal transmission line 4 away from the thermocouple probe 5 is inserted from the installation hole 2 into the temperature measuring hole 3, and the end of the thermocouple signal transmission line 4 away from the thermocouple probe 5 is pulled out after passing through the temperature measuring hole 3, and the thermocouple signal transmission line 4 is pulled outward, the length of the compression spring 6 is compressed, and then the head of the thermocouple probe 5 is inserted into the retaining hole 9, and finally the wire clamp 11 is installed on the end face of the bearing fixing seat 1 to fix the thermocouple signal transmission line 4.

[0039] The generator set bearing temperature detection structure according to the embodiment of the present application has at least the following beneficial effects:

[0040] First, the thermocouple probe 5 is detachably arranged to avoid damaging the thermocouple probe 5 during the maintenance of the steam turbine.

[0041] Second, the thermocouple signal transmission line 4 is fixed by the wire clamp 11 to avoid the problem that the thermocouple signal transmission line 4 is pulled, resulting in poor contact of the thermocouple probe 5.

[0042] Third, the installation hole 2 is a round hole or a straight groove, and the hole originally provided by the bearing pedestal 1 can be used for operation, thereby reducing the secondary processing of the bearing pedestal 1.

[0043] Embodiment 2

[0044] Refer to Figure 3 and Figure 4 A temperature detection structure for the bearing bush of a generator set. The difference between this embodiment and Embodiment 1 is that the installation hole 2 is a blind hole, and the bearing pedestal 1 is provided with an inclined groove 10 at the opening of the retention hole 9 for facilitating the removal of the thermocouple probe 5. A metal elastic sheet 13 for pushing the thermocouple probe 5 towards the inclined groove 10 is fixed in the installation hole 2. The metal elastic sheet 13 is in a V shape. One side of the metal elastic sheet 13 is fixed to the bottom of the installation hole 2, and the other side abuts against the side wall of the thermocouple probe 5.

[0045] The temperature detection structure for the bearing bush of a generator set in the embodiment of the present application has at least the following beneficial effects: it is convenient to disassemble the thermocouple probe 5; during disassembly, when pulling the thermocouple signal transmission line 4, the thermocouple signal transmission line 4 drives the thermocouple probe 5 to leave the retention hole 9. Then, under the action of the metal elastic sheet 13, the thermocouple probe 5 is pushed towards the opening of the installation hole 2. Then, release the thermocouple signal transmission line 4, and the compression spring 6 extends, pushing the thermocouple probe 5 to slide out of the installation hole 2 along the inclined groove 10, facilitating the removal of the thermocouple probe 5.

[0046] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A generator set bearing temperature detection structure, characterized in that: The invention comprises a bearing bush fixing seat (1), wherein the inner wall of the bearing bush fixing seat (1) is provided with a mounting hole (2), and the end surface of the bearing bush fixing seat (1) is provided with a temperature measuring hole (3), wherein the temperature measuring hole (3) is provided along the axial direction of the bearing bush fixing seat (1), the temperature measuring hole (3) is communicated with the mounting hole (2), and a thermocouple signal transmission line (4) is passed through the temperature measuring hole (3), wherein one end of the thermocouple signal transmission line (4) extends out of the bearing bush fixing seat (1), and the other end extends into the mounting hole (2) and is connected to a thermocouple signal transmission line (4). The thermocouple probe (5) is provided with an elastic member on the thermocouple signal transmission line (4) for abutting the thermocouple probe (5) against the inner wall of the mounting hole (2), and the elastic member is located in the mounting hole (2); the elastic member comprises a small washer (7), a compression spring (6) and a large washer (8) which are sequentially mounted on the thermocouple signal transmission line (4), the inner diameter of the small washer (7) is smaller than the outer diameter of the thermocouple probe (5), and the small washer (7) is located between the thermocouple probe (5) and the compression spring (6).

2. A generator set bearing temperature detection structure according to claim 1, characterized in that: The bearing fixing seat (1) is provided with a retaining hole (9) on the inner wall of the mounting hole (2); the retaining hole (9) is coaxially arranged relative to the temperature measuring hole (3); and the end of the thermocouple probe (5) away from the thermocouple signal transmission line (4) is inserted into the retaining hole (9).

3. A generator set bearing temperature detection structure according to claim 1, characterized in that: The outer jacket of the thermocouple signal transmission line (4) is provided with a braided shielding wire sleeve (14).

4. A generator set bearing temperature detection structure according to claim 1, characterized in that: The mounting hole (2) is a round hole or a straight slot.

5. A generator set bearing temperature detection structure according to claim 2, characterized in that: The bearing bush fixing seat (1) is provided with an inclined groove (10) at the opening of the retaining hole (9) for facilitating the removal of the thermocouple probe (5).

6. A generator set bearing temperature detection structure according to claim 5, characterized in that: The mounting hole (2) is a blind hole, and a metal spring (13) is fixed in the mounting hole (2) for pushing the thermocouple probe (5) toward the inclined groove (10).

7. A generator set bearing temperature detection structure according to claim 1 or 6, characterized in that: The end surface of the bearing bush fixing seat (1) is threadedly connected with a wire clamp (11) for fixing the thermocouple signal transmission wire (4).

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