Method for mounting ggh heat exchanger support bearing

Abstract

The application provides a kind of installation method of GGH heat exchanger support bearing, belongs to metallurgical construction technical field, by first fixing base plate in the position of support bearing of base, placing support pad in the center of base plate, then hoisting and placing bearing box on base plate, and by making the center of bearing box coincide with support pad, the position installation precision of bearing box can be ensured, by the structural design of lug, adjusting nut and adjusting bolt on bearing box, by adjusting the length of bottom end of adjusting bolt, the levelness of bearing box is adjusted, the levelness adjustment is more easily operated, and the efficiency of levelness adjustment in bearing installation process is improved.The application can effectively solve the problem of high adjustment precision requirement of support bearing, greatly improve the construction efficiency, and ensure the construction quality, ensure the safe operation of support bearing.

Description

Technical Field

[0001] This invention relates to the field of metallurgical construction technology, and more specifically, to a method for installing a support bearing for a GGH heat exchanger. Background Technology

[0002] The GGH flue gas heat exchanger is the core equipment of the SCR denitrification unit. It is usually composed of components such as support bearings, heat exchange elements and heat exchange element boxes, rotor supporting heat exchange elements and rotor housing, end columns, top structure, bottom structure, sealing device, and drive device.

[0003] The support bearing is installed inside the bearing housing and sealed at the top by the bearing housing cover. Its structure is complex and its weight is relatively heavy. Due to the heavy pressure and the fact that it is in a rotating state, the adjustment requirements of the support bearing are high. If the traditional method of setting a shim on the base to adjust the bearing housing and grouting is used, the adjustment efficiency of the support bearing is low, and it is easy for the support bearing to shift due to insufficient precision, thereby affecting the operational safety of the support bearing. Summary of the Invention

[0004] In view of the above problems, the purpose of this invention is to provide an installation method for the support bearing of a GGH heat exchanger, so as to solve the problem that in the prior art, the traditional method of setting a pad on the base to adjust the bearing housing and grouting is inefficient in adjusting the precision of the support bearing, and is prone to the problem that the support bearing will shift due to insufficient precision, thereby affecting the operational safety of the support bearing.

[0005] The installation method for the GGH heat exchanger support bearing provided by this invention includes the following steps:

[0006] According to the design drawings, locate the position of the support bearing on the base, and fix the circular base plate at the position of the support bearing;

[0007] A circular support pad is placed at the center of the base plate, and the level of the support pad is adjusted to meet the preset level requirements.

[0008] The bearing housing is hoisted onto the base plate, and the center of the bearing housing coincides with the support pad; wherein, the bearing housing includes a housing body; two lifting lugs are symmetrically arranged on the outer side wall of the housing body, and at least four ear plates are fixedly provided on the lower part of the outer side wall of the housing body. The ear plates are evenly arranged around the perimeter of the housing body, and an adjusting nut is fixedly provided on the lower part of the outer side of the ear plate. An adjusting bolt is vertically inserted into the adjusting nut.

[0009] The levelness of the bearing housing is adjusted by adjusting the extension length of the bottom end of the adjusting bolt, so that the bearing housing meets the preset bearing housing levelness requirements;

[0010] The bearing is lifted and placed inside the bearing housing. The bearing housing is leveled by adjusting the extension length of the bottom end of the adjusting bolt so that the bearing meets the preset bearing level requirements. The bearing cover is then placed on top of the bearing.

[0011] Sealant is applied to the gaps between the base plate and the support pad, the gap between the base plate and the bearing housing, and the gap between the support pad and the bearing housing.

[0012] After the sealant has dried completely, lubricating oil is injected into the designated location inside the bearing housing, and the plug of the oil temperature measuring device is installed at the designated location in the bearing housing to complete the installation of the support bearing.

[0013] Furthermore, a preferred embodiment includes, before positioning the support bearing on the base according to the design drawings and fixing the circular base plate at the position of the support bearing, the following steps are also included:

[0014] The levelness, dimensions, and surface cleanliness of the base are inspected.

[0015] Furthermore, a preferred embodiment is that, during the process of locating the support bearing position on the base according to the design drawings and fixing the circular base plate at the support bearing position,

[0016] The base plate is fixed to the position of the support bearing by welding.

[0017] Furthermore, a preferred embodiment includes placing a support pad at the center of the base plate, comprising:

[0018] Determine the center of the base plate and mark the center of the base plate;

[0019] Place the support pad at the marked location.

[0020] Furthermore, a preferred embodiment is that the circumferential gap between the support pad and the base plate is within 2.5 mm.

[0021] Furthermore, a preferred embodiment is that the levelness requirement of the preset support pad is less than 0.5mm / 1000mm.

[0022] Furthermore, a preferred embodiment is that the preset bearing housing levelness requirement is 0.5mm / 1000mm.

[0023] Furthermore, a preferred embodiment is that the bearing levelness requirement is 0.5mm / 1000mm.

[0024] Furthermore, in a preferred embodiment, after filling the gaps between the base plate and the support pad, the base plate and the bearing housing, and the support pad and the bearing housing with sealant, the method further includes:

[0025] Remove the adjusting bolt from the bearing housing.

[0026] Furthermore, a preferred embodiment is that during the process of injecting lubricating oil into the designated location within the bearing housing,

[0027] Lubricating oil is injected into a designated location within the bearing housing using an oiler and an oil level gauge.

[0028] As can be seen from the above technical solution, the installation method of the GGH heat exchanger support bearing provided by this invention involves first fixing the base plate at the support bearing position on the base, placing a support pad at the center of the base plate, and then hoisting the bearing housing onto the base plate. By aligning the center of the bearing housing with the support pad, the installation accuracy of the bearing housing can be ensured. The structural design of the ear plates, adjusting nuts, and adjusting bolts on the bearing housing allows for leveling the bearing housing by adjusting the extension length of the bottom end of the adjusting bolts, making leveling accuracy adjustment easier and improving the efficiency of leveling accuracy adjustment during bearing installation. By filling the gaps between the base plate and the support pad, the gap between the base plate and the bearing housing, and the gap between the support pad and the bearing housing with sealant, the support bearing that meets the accuracy requirements can be fixed on the base. This invention effectively solves the problem of high accuracy requirements for support bearing adjustment, greatly improves construction efficiency, ensures construction quality, and guarantees the safe operation of the support bearing.

[0029] To achieve the foregoing and related objectives, one or more aspects of the invention include the features that will be described in detail below. The following description and accompanying drawings illustrate certain exemplary aspects of the invention. However, these aspects indicate only a few of the various ways in which the principles of the invention can be used. Furthermore, the invention is intended to encompass all such aspects and their equivalents. Attached Figure Description

[0030] Other objects and results of the invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings, and with a more complete understanding of the invention.

[0031] Figure 1 A flowchart illustrating the installation method of the GGH heat exchanger support bearing according to an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the support bearing assembly installation according to an embodiment of the present invention;

[0033] Figure 3This is a schematic diagram of the support bearing assembly process according to an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of the support bearing assembly according to an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the lifting device used for bearing hoisting according to an embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of a bearing hoisting structure according to an embodiment of the present invention;

[0037] Figure 7 This is a schematic cross-sectional view of the support bearing assembly according to an embodiment of the present invention.

[0038] In the attached diagram, 1-base, 2-base plate, 3-support pad, 4-bearing box, 41-box body, 42-lifting lug, 43-ear plate, 44-adjusting nut, 45-adjusting bolt, 5-bearing, 6-bearing cover, 7-lifting device, 71-lifting beam, 72-bracket, 73-fixing pin, 74-lifting lug.

[0039] In all the accompanying drawings, the same reference numerals indicate similar or corresponding features or functions. Detailed Implementation

[0040] In response to the aforementioned issue that the existing technology uses the traditional method of setting a pad on the base to adjust the bearing housing and then grouting, which has low efficiency in adjusting the precision of the support bearing and is prone to causing the support bearing to shift due to insufficient precision, thereby affecting the operational safety of the support bearing, a new installation method for the support bearing of the GGH heat exchanger is proposed.

[0041] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0042] To illustrate the installation method of the GGH heat exchanger support bearing provided by the present invention, Figure 1 The flowchart illustrates the installation method of the GGH heat exchanger support bearing according to an embodiment of the present invention; Figure 2 The mounting of the support bearing assembly according to an embodiment of the present invention is shown; Figure 3 The structure of the support bearing assembly process according to an embodiment of the present invention is shown; Figure 4 The structure of the support bearing assembly according to an embodiment of the present invention is shown; Figure 5 The lifting device structure used for bearing hoisting according to an embodiment of the present invention is shown; Figure 6 A bearing hoisting structure according to an embodiment of the present invention is shown; Figure 7 A cross-sectional structure of the support bearing assembly according to an embodiment of the present invention is shown.

[0043] like Figures 1 to 7 As shown in the figure, the installation method of the GGH heat exchanger support bearing provided by the present invention includes the following steps:

[0044] Step S1: According to the design drawings, locate the position of the support bearing on the base 1, and fix the circular base plate 2 at the position of the support bearing;

[0045] Step S2: Place a circular support pad 3 at the center of the base plate 2 and adjust the level of the support pad 3 to meet the preset level requirements of the support pad.

[0046] Step S3: Hoist the bearing housing 4 onto the base plate 1 and make the center of the bearing housing 4 coincide with the support pad 3; wherein, the bearing housing 4 includes a housing 41; two lifting lugs 42 are symmetrically arranged on the outer side wall of the housing 41, and at least four ear plates 43 are fixedly provided on the lower part of the outer side wall of the housing 41. The ear plates 43 are evenly arranged around the periphery of the housing 41, and an adjusting nut 44 is fixedly provided on the lower part of the outer side end of the ear plate 43. An adjusting bolt 45 is vertically inserted into the adjusting nut 44.

[0047] Step S4: Adjust the level of the bearing housing 4 by adjusting the extension length of the bottom end of the adjusting bolt 45 so that the bearing housing 4 meets the preset bearing housing level requirements.

[0048] Step S5: Lift the bearing 5 and place it in the bearing housing 4. Adjust the level of the bearing housing 4 with the bearing 5 placed in it by adjusting the bottom extension length of the adjusting bolt 45 so that the bearing 5 meets the preset bearing level requirements. Then, cover the top of the bearing 5 with the bearing cover 6.

[0049] Step S6: Fill the gaps between the base plate 2 and the support pad 3, the base plate 2 and the bearing housing 4, and the support pad 3 and the bearing housing 4 with sealant.

[0050] Step S7: After the sealant has dried completely, inject lubricating oil into the designated position inside the bearing housing 4, and install the plug of the oil temperature measuring device at the designated position in the bearing housing 4 to complete the installation of the support bearing.

[0051] It should be noted that the above steps are used to install a single support bearing. There are generally four support bearings. The other three support bearings can be installed using the same steps as described above.

[0052] By first fixing the base plate 2 at the support bearing position on the base, placing the support pad 3 at the center of the base plate 2, and then hoisting the bearing housing 4 onto the base plate 2, and ensuring that the center of the bearing housing 4 coincides with the support pad 3, the installation accuracy of the bearing housing 4 can be guaranteed. Through the structural design of the ear plate 43, adjusting nut 44, and adjusting bolt 45 on the bearing housing 4, the horizontality of the bearing housing 4 can be adjusted by adjusting the extension length of the bottom end of the adjusting bolt 45, making horizontal accuracy adjustment easier and improving the efficiency of horizontal accuracy adjustment during bearing installation. By filling the gaps between the base plate 2 and the support pad 3, the gap between the base plate 2 and the bearing housing 4, and the gap between the support pad 3 and the bearing housing 4 with sealant, the support bearing that meets the accuracy requirements can be fixed on the base 1. This invention effectively solves the problem of high accuracy requirements for support bearing adjustment, greatly improves construction efficiency, ensures construction quality, and guarantees the safe operation of the support bearing.

[0053] In step S5, the bearing 5 can be lifted using the lifting device for the supporting bearing provided in the previously filed utility model patent CN 222063864 U. For example... Figures 5 to 7 As shown, the lifting device 7 consists of two lifting beams 71 arranged at 90° angles. Each lifting beam 71 has two strip-shaped holes and two brackets 72 are installed, connected and fixed by fixing pins 73. The brackets 72 are L-shaped, and lifting lugs 74 are installed in the middle of the lifting device 7. The length of the lifting beams 71 of the lifting device 7 is 2 / 3 to 4 / 5 of the top diameter of the bearing 5. Using this lifting device 7 can ensure the accurate and safe lifting of the bearing 5 without lifting lugs. All contact surfaces should be protected with soft insulation such as polytetrafluoroethylene gaskets.

[0054] As a preferred embodiment of the present invention, before positioning the support bearing on the base 1 according to the design drawings and fixing the circular base plate 2 at the position of the support bearing, the method further includes:

[0055] The levelness, dimensions, and surface cleanliness of base 1 are inspected.

[0056] Specifically, such as Figure 2 As shown, four support bearings are generally required to be installed on the base 1. In order to ensure the stable operation of the support bearings, the level of the base 1 needs to be adjusted, the dimensions need to be designed, and the base needs to be cleaned until it meets the acceptance requirements.

[0057] As a preferred embodiment of the present invention, during the process of positioning the support bearing on the base 1 according to the design drawings, and fixing the circular base plate 2 at the position of the support bearing,

[0058] The base plate 2 is fixed to the position of the supporting bearing by welding.

[0059] It should be noted that fixing the base plate 2 to the support bearing position by welding is the preferred solution, but other fixing methods can also be used, such as adhesive bonding, etc. The present invention does not particularly limit this.

[0060] As a preferred embodiment of the present invention, a support pad 3 is placed at the center of the base plate 2, including:

[0061] Determine the center of base plate 2 and mark the center of base plate 2;

[0062] Place support pad 3 at the marked position.

[0063] Specifically, draw and mark the center line of each base plate 2, and place the support pad 3 at the center line position.

[0064] As a preferred embodiment of the present invention, the circumferential gap between the support pad 3 and the base plate 2 is within 2.5 mm.

[0065] As a preferred embodiment of the present invention, the preset support pad levelness requirement is less than 0.5mm / 1000mm.

[0066] As a preferred embodiment of the present invention, the preset bearing housing levelness requirement is 0.5mm / 1000mm.

[0067] As a preferred embodiment of the present invention, the bearing levelness requirement is set to 0.5mm / 1000mm.

[0068] It should be noted that the above-mentioned level requirements can be set according to actual needs, and this invention does not impose any special limitations on them.

[0069] As a preferred embodiment of the present invention, after filling the gaps between the base plate 2 and the support pad 3, the base plate 2 and the bearing housing 4, and the support pad 3 and the bearing housing 4 with sealant, the method further includes:

[0070] Remove the adjusting bolt 5 from the bearing housing 4.

[0071] As a preferred embodiment of the present invention, during the process of injecting lubricating oil into a designated position within the bearing housing 4...

[0072] Lubricating oil is injected into the designated position inside the bearing housing using an oiler and an oil level gauge.

[0073] As can be seen from the above specific embodiments, the installation method of the GGH heat exchanger support bearing provided by the present invention first fixes the base plate at the support bearing position on the base, places the support pad in the center of the base plate, and then hoists the bearing housing onto the base plate. By aligning the center of the bearing housing with the support pad, the installation accuracy of the bearing housing position can be ensured. The structural design of the ear plate, adjusting nut, and adjusting bolt on the bearing housing, along with adjusting the extension length of the bottom end of the adjusting bolt, allows for leveling of the bearing housing, making leveling accuracy adjustment easier and improving the efficiency of leveling accuracy adjustment during bearing installation. By filling the gaps between the base plate and the support pad, the gap between the base plate and the bearing housing, and the gap between the support pad and the bearing housing with sealant, the support bearing that meets the accuracy requirements can be fixed on the base. The present invention effectively solves the problem of high adjustment accuracy requirements for support bearings, greatly improves construction efficiency, ensures construction quality, and ensures the safe operation of the support bearing.

[0074] The installation method of the GGH heat exchanger support bearing according to the present invention has been described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various modifications can be made to the installation method of the GGH heat exchanger support bearing according to the present invention without departing from the scope of the invention. Therefore, the scope of protection of the present invention should be determined by the contents of the appended claims.

Claims

1. A method for installing a support bearing in a GGH heat exchanger, characterized in that, Includes the following steps: According to the design drawings, locate the position of the support bearing on the base, and fix the circular base plate at the position of the support bearing; A circular support pad is placed at the center of the base plate, and the level of the support pad is adjusted to meet the preset level requirements. The bearing housing is hoisted onto the base plate, and the center of the bearing housing coincides with the support pad; wherein, the bearing housing includes a housing body; two lifting lugs are symmetrically arranged on the outer side wall of the housing body, and at least four ear plates are fixedly provided on the lower part of the outer side wall of the housing body. The ear plates are evenly arranged around the perimeter of the housing body, and an adjusting nut is fixedly provided on the lower part of the outer side of the ear plate. An adjusting bolt is vertically inserted into the adjusting nut. The levelness of the bearing housing is adjusted by adjusting the extension length of the bottom end of the adjusting bolt, so that the bearing housing meets the preset bearing housing levelness requirements; The bearing is lifted and placed inside the bearing housing. The bearing housing is leveled by adjusting the extension length of the bottom end of the adjusting bolt so that the bearing meets the preset bearing level requirements. The bearing cover is then placed on top of the bearing. Sealant is applied to the gaps between the base plate and the support pad, the gap between the base plate and the bearing housing, and the gap between the support pad and the bearing housing; then the adjusting bolt is removed from the bearing housing. After the sealant has dried completely, lubricating oil is injected into the designated location inside the bearing housing, and the plug of the oil temperature measuring device is installed at the designated location in the bearing housing to complete the installation of the support bearing.

2. The installation method of the GGH heat exchanger support bearing according to claim 1, characterized in that, Before positioning the support bearing on the base according to the design drawings and fixing the circular base plate at the position of the support bearing, the method further includes: The levelness, dimensions, and surface cleanliness of the base are inspected.

3. The installation method of the GGH heat exchanger support bearing according to claim 1, characterized in that, During the process of locating the support bearing position on the base according to the design drawings, and fixing the circular base plate at the support bearing position, The base plate is fixed to the position of the support bearing by welding.

4. The installation method of the GGH heat exchanger support bearing according to claim 1, characterized in that, A support pad is placed at the center of the base plate, including: Determine the center of the base plate and mark the center of the base plate; Place the support pad at the marked location.

5. The installation method of the GGH heat exchanger support bearing according to claim 1, characterized in that, The circumferential gap between the support pad and the base plate is within 2.5 mm.

6. The installation method of the GGH heat exchanger support bearing according to claim 1, characterized in that, The required levelness of the preset support pad is less than 0.5mm / 1000mm.

7. The installation method of the GGH heat exchanger support bearing according to claim 1, characterized in that, The preset bearing box levelness requirement is 0.5mm / 1000mm.

8. The installation method of the GGH heat exchanger support bearing according to claim 1, characterized in that, The preset bearing levelness requirement is 0.5mm / 1000mm.

9. The installation method of the GGH heat exchanger support bearing according to claim 1, characterized in that, During the process of injecting lubricating oil into a designated location within the bearing housing Lubricating oil is injected into a designated location within the bearing housing using an oiler and an oil level gauge.

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