Hand-cranking quick dismounting device for steam turbine barring

Abstract

The utility model discloses a hand-cranking quick dismounting device for a steam turbine barring gear, which comprises a cover plate, the surface of which is provided with a screw hole; the threaded blocking plate is screwed into the screw hole of the cover plate, and the horizontal projection of the threaded blocking plate is located at the position of the steam turbine barring crank; a lubricating assembly is arranged on the outer surface of the cover plate and comprises an oil storage tank, the oil storage tank and the screw hole are formed in the cover plate in a concentric circle shape, and oil penetrating holes communicated with the screw hole are formed in the inner wall of the oil storage tank at equal angles; according to the design of the utility model, the special hole is arranged on the cover plate corresponding to the operating position of the crank, so that the whole cover plate does not need to be completely disassembled, and the crank can be immediately inserted through the hole to carry out manual turning operation only by quickly removing the simple threaded blocking plate positioned at the hole, thereby greatly simplifying the operation process and improving the working efficiency. The fault response time is shortened, precious processing time is gained for technicians, and the hot bending risk caused by long-time static of the rotor is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of steam turbines, and particularly relates to a hand-cranked quick disassembly device for a steam turbine turning gear. Background Art

[0002] During the critical startup and shutdown phases of a steam turbine generator set, continuous use of the turning gear is crucial to ensure a smooth transition and avoid potential damage. This device maintains the rotor at a low speed, effectively preventing thermal bending caused by uneven heat distribution, thereby protecting the unit's overall structural integrity and operational stability.

[0003] However, in practice, the turning mechanism doesn't always operate flawlessly. If a problem occurs during the turning process, a quick and effective response becomes imperative. Technicians are required to remove the side cover of the turning mechanism, a step accomplished by using specialized tools like wrenches to individually loosen the 16 bolts securing the cover to the main body. The technician then manually turns the rotor using a crank to maintain the necessary mobility. Operating specifications dictate that the rotor be turned at least 180° every 30 minutes, achieving a flip. This minimizes the risk of deformation caused by prolonged inactivity.

[0004] The problem is that the side cover is tightly connected with up to 16 bolts. This means that in an emergency, it takes a considerable amount of time to contact professionals, find and prepare the necessary disassembly tools, and loosen these bolts one by one. In addition, the long rotor standstill time caused by a cranking failure, coupled with the time delay during the disassembly process, significantly increases the risk of thermal bending and mechanical stress concentration on the rotor, posing a major safety hazard. Utility Model Content

[0005] The purpose of the utility model is to provide a hand-cranked quick disassembly device for a steam turbine turning gear, so as to solve the problem in the above background technology that the disassembly of the turning gear side cover plate is time-consuming and inconvenient to operate.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a quick disassembly device for hand-cranking a turbine crank, comprising a cover plate with a screw hole provided on the surface; a threaded plugging plate screwed into the screw hole of the cover plate, the horizontal projection of the threaded plugging plate being at the position of the turbine cranking handle, so that during maintenance, the threaded plugging plate can be directly separated from the screw hole to insert the cranking handle into the cranking gear for subsequent operations; a lubrication assembly is provided on the outer surface of the cover plate, the lubrication assembly comprising: an oil storage tank, which is provided on the cover plate in a concentric circle with the screw hole, the inner wall of the oil storage tank is provided with oil holes connected to the screw hole at equal angles, and an oil filling hole is provided on the top inner wall of the oil storage tank, the end of the oil filling hole extends through to the front surface of the cover plate At this time, the oil filling hole, the oil storage tank and the oil penetration hole form a channel; the sealing part is composed of a closing part and a blocking part, wherein the closing part is embedded in the opening position of the oil storage tank, and forms an annular cavity between the closing part and the oil storage tank, and the cavity is injected with lubricating oil. During the frequent disassembly of the threaded plugging plate, the lubricating oil in the cavity can be discharged to achieve lubrication of the connection between the screw hole and the threaded plugging plate, avoiding the phenomenon of difficulty in rotation, and the blocking part and the oil storage tank are concentrically arranged and cover all the oil penetration holes; the adjusting part is installed at the top position of the oil filling hole, and the adjusting part pushes the sealing part open through the pressure generated by pressing, so that the lubricating oil is discharged from the oil penetration hole to the connection between the threaded plugging plate and the screw hole for lubrication.

[0007] Preferably, the closing portion is a sealing rubber ring, the width of which is greater than the inner width of the oil storage tank, so that the sealing rubber ring can be stuck into the oil storage tank by deformation to achieve sealing with the oil storage tank.

[0008] Preferably, the blocking portion is a barrier ring, on which cross cuts are formed by cutting at equal angles, and each of the cross cuts corresponds to a single oil hole. Under normal circumstances, the cross cuts are in a closed state, thereby sealing the lubricating oil in the annular cavity to prevent it from flowing into the oil hole. Under the pressure of the adjusting part, the gas pressure inside the annular cavity increases, pushing the cross cut open. At this time, the lubricating oil is transmitted through the oil hole to the connection between the threaded plug and the screw hole. When the adjusting part is no longer pressed, the cross cut continues to close to achieve sealing.

[0009] Preferably, the oil filling hole is formed with a threaded hole at the opening on the front surface of the cover plate, and the adjusting part includes a threaded sleeve screwed into the threaded hole, and a pressing sleeve installed at the outer end of the threaded sleeve. The pressing of the pressing sleeve enables the gas inside the oil filling hole to flow into the oil storage tank, thereby pushing open the cross cut.

[0010] Preferably, the contact end faces of the barrier ring and the sealing rubber ring are in abutment with each other, so the sealing rubber ring can be used to limit the installation position of the barrier ring, and the thickness of the barrier ring is smaller than that of the sealing rubber ring.

[0011] Preferably, the front surface of the threaded plug is symmetrically provided with an operating groove, which is a semicircular structure. Through the provision of the operating groove, the threaded plug can be easily rotated to avoid disassembly.

[0012] Preferably, the inner diameter of the threaded sleeve is larger than the inner diameter of the oil filling hole, so as to achieve greater gas flow and bring greater gas pressure. The threaded sleeve and the pressing sleeve are hot-melt connected to achieve an integrated connection and avoid the occurrence of connection gaps.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] Through the design of the utility model, a special opening is opened on the cover plate corresponding to the crank operation position, so that in an emergency, there is no need to completely disassemble the entire cover plate. It is only necessary to quickly remove the simple threaded plug at the opening, and then the crank can be immediately inserted through the hole for manual cranking operation. This change greatly simplifies the operating process, shortens the fault response time, and gains valuable processing time for technicians, effectively reducing the risk of thermal bending caused by long-term static rotor. At the same time, the added lubrication component can quickly lubricate when the thread is difficult to rotate, ensuring that the normal disassembly progress is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 It is a cross-sectional view of the utility model;

[0017] Figure 3 For this utility model Figure 2 A magnified schematic diagram of area A in the middle;

[0018] Figure 4 This is a schematic structural diagram of the barrier ring of the utility model.

[0019] In the picture:

[0020] 100, cover plate; 101, pressing sleeve; 102, sealing rubber ring; 103, threaded sleeve; 104, oil filling hole; 105, oil storage tank; 106, barrier ring; 107, oil hole; 108, cross cut;

[0021] 200. Threaded plug; 201. Operating slot. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figures 1 to 4 The utility model provides a technical solution: a hand-cranked quick disassembly device for a steam turbine turning gear, comprising:

[0024] The cover plate 100 has a screw hole on its surface;

[0025] The threaded plug 200 is screwed into the screw hole of the cover plate 100. The horizontal projection of the threaded plug 200 is at the position of the turbine crank handle. Therefore, during maintenance, the threaded plug 200 can be directly separated from the screw hole to insert the crank handle into the turbine for subsequent operations.

[0026] The outer surface of the cover plate 100 is provided with a lubrication assembly, which includes:

[0027] An oil reservoir 105 is provided on the cover plate 100 in a concentric circle with the screw hole. Oil holes 107 communicating with the screw hole are provided on the inner wall of the oil reservoir 105 at equal angles. An oil filling hole 104 is provided on the top inner wall of the oil reservoir 105. The end of the oil filling hole 104 extends through to the front surface of the cover plate 100. The oil filling hole 104, the oil reservoir 105, and the oil filling hole 107 form a channel.

[0028] The blocking member is composed of a closing portion and a blocking portion. The closing portion is embedded in the opening of the oil reservoir 105 and forms an annular cavity with the oil reservoir 105. Lubricating oil is injected into the cavity. When the threaded plug 200 is frequently disassembled, the lubricating oil in the cavity can be discharged to lubricate the connection between the screw hole and the threaded plug 200, thereby avoiding the phenomenon of difficulty in rotation. The blocking portion and the oil reservoir 105 are arranged concentrically and cover all the oil holes 107.

[0029] The adjusting part is installed at the top of the oil filling hole 104. The adjusting part pushes the sealing member open by the pressure generated by pressing, so that the lubricating oil is discharged from the oil hole 107 to the connection between the threaded plug 200 and the screw hole for lubrication.

[0030] In this embodiment, preferably, the closing portion is a sealing rubber ring 102 , the width of which is greater than the inner width of the oil storage tank 105 , so that the sealing rubber ring 102 can be stuck into the oil storage tank 105 by deformation to achieve sealing with the oil storage tank 105 .

[0031] In this embodiment, preferably, the blocking portion is a barrier ring 106, and a cross cut 108 is formed on the barrier ring 106 by cutting at equal angles. Each cross cut 108 corresponds to a single oil hole 107. Under normal circumstances, the cross cut 108 is in a closed state, thereby blocking the lubricating oil in the annular cavity and preventing it from flowing into the oil hole 107. Under the pressure of the adjusting part, the gas pressure inside the annular cavity increases, pushing the cross cut 108 open. At this time, the lubricating oil is transmitted through the oil hole 107 to the connection between the threaded plug 200 and the screw hole. When the adjusting part is no longer pressed, the cross cut 108 continues to close to achieve sealing.

[0032] In this embodiment, preferably, the oil filling hole 104 is formed with a threaded hole at the opening on the front surface of the cover plate 100, and the adjustment part includes a threaded sleeve 103 screwed into the threaded hole, and a pressing sleeve 101 installed at the outer end of the threaded sleeve 103. The pressing sleeve 101 is pressed to enable the internal gas of the oil filling hole 104 to flow into the oil storage tank 105, thereby pushing open the cross cut 108.

[0033] In this embodiment, preferably, the contact end faces of the barrier ring 106 and the sealing rubber ring 102 are in abutment with each other, so the sealing rubber ring 102 can be used to limit the installation position of the barrier ring 106 , and the thickness of the barrier ring 106 is less than the thickness of the sealing rubber ring 102 .

[0034] In this embodiment, preferably, an operating groove 201 is symmetrically provided on the front surface of the threaded plug 200. The operating groove 201 is a semicircular structure. Through the setting of the operating groove 201, the threaded plug 200 can be easily rotated to avoid disassembly.

[0035] In this embodiment, preferably, the inner diameter of the threaded sleeve 103 is larger than the inner diameter of the oil filling hole 104, so as to achieve greater gas flow and bring greater gas pressure. The threaded sleeve 103 and the pressing sleeve 101 are hot-melt connected to achieve an integrated connection and avoid the occurrence of connection gaps.

[0036] Although embodiments of the present invention have been shown and described (see the detailed description above for details), it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The hand-cranked quick disassembly device for the steam turbine cranking is characterized by: include: The cover plate (100) has a screw hole formed on its surface; A threaded plug (200) is screwed into a screw hole of the cover plate (100), and a horizontal projection of the threaded plug (200) is located at the position of the turbine crank handle; The outer surface of the cover plate (100) is provided with a lubrication assembly, which comprises: An oil storage tank (105) is provided on the cover plate (100) in a concentric circle with the screw hole. An oil hole (107) communicating with the screw hole is provided on the inner wall of the oil storage tank (105) at an equal angle. An oil filling hole (104) is provided on the top inner wall of the oil storage tank (105). The end of the oil filling hole (104) extends through to the front surface of the cover plate (100). The blocking member is composed of a closing portion and a blocking portion, wherein the closing portion is embedded in the opening of the oil storage tank (105) and forms an annular cavity with the oil storage tank (105), wherein lubricating oil is injected into the cavity, and the blocking portion and the oil storage tank (105) are arranged concentrically and cover all the oil holes (107); The regulating part is installed at the top of the oil filling hole (104), and the regulating part pushes the blocking piece open by the pressure generated by pressing.

2. The hand-cranked quick disassembly device for a steam turbine turning gear according to claim 1 is characterized in that: The closing portion is a sealing rubber ring (102), and the width of the sealing rubber ring (102) is greater than the inner width of the oil storage tank (105).

3. The hand-cranked quick disassembly device for a steam turbine turning gear according to claim 2, characterized in that: The blocking portion is a barrier ring (106), and cross cuts (108) are formed on the barrier ring (106) by cutting at equal angles, and each cross cut (108) corresponds to a single oil hole (107).

4. The hand-cranked quick disassembly device for a steam turbine turning gear according to claim 3 is characterized in that: The oil filling hole (104) is formed with a threaded hole at the opening of the front surface of the cover plate (100), and the adjustment part includes a threaded sleeve (103) screwed into the threaded hole, and a pressing sleeve (101) installed on the outer end of the threaded sleeve (103).

5. The hand-cranked quick disassembly device for a steam turbine turning gear according to claim 3 is characterized in that: The contact end faces of the barrier ring (106) and the sealing rubber ring (102) are in abutment with each other, and the thickness of the barrier ring (106) is smaller than the thickness of the sealing rubber ring (102).

6. The hand-cranked quick disassembly device for a steam turbine turning gear according to claim 1 is characterized in that: The front surface of the threaded plug (200) is symmetrically provided with an operating groove (201), and the operating groove (201) is in a semicircular structure.

7. The hand-cranked quick disassembly device for a steam turbine turning gear according to claim 4, characterized in that: The inner diameter of the threaded sleeve (103) is larger than the inner diameter of the oil injection hole (104), and the threaded sleeve (103) and the pressing sleeve (101) are connected by hot melt.

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