Turning tool with collecting ring for pumped storage power station unit

Abstract

The utility model discloses a turning tool with a collecting ring for a pumped storage power station unit, and relates to the technical field of water-turbine generator sets. Comprising a collecting ring support arranged on an upper end shaft, a plurality of collecting rings arranged on the collecting ring support in a sleeving mode, a turning support arranged on the top of the collecting ring support and a fixing support arranged on one side of the collecting ring support, and a plurality of dial indicators used for correspondingly measuring the concentricity of the collecting rings are arranged on the fixing support. The number of the dial indicators is the same as that of the collecting rings, and the dial indicators and the collecting rings are in one-to-one correspondence; and pointers of the dial indicators are in contact with the corresponding collecting rings. According to the utility model, the design is reasonable, the reading of the corresponding collecting ring is measured through the jigger frame and the arranged dial indicator, and the throw (also can be called concentricity) of the reading is calculated through the least square method. One-time turning with a collecting ring can be achieved, monitoring and collecting of throw data of all parts needing to be monitored are achieved, the labor cost is saved, and the construction period is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of hydro-generating units, and more specifically to the technical field of a turning gear tool with a slip ring for a pumped storage power station unit. Background Art

[0002] As of the end of September 2023, the total installed capacity of pumped storage power stations built in China has reached more than 50 million kW, ranking first in the world. Pumped storage units are responsible for frequency modulation, peak shaving, valley filling, and emergency standby in the power grid, and are the safety guards of the power grid. The safe and stable operation of the units is extremely important. During the installation process, the inspection and adjustment of the unit's axis are key tasks affecting the safe and stable operation of the unit, and the inspection and adjustment of the axis are achieved through turning gear, so turning gear is particularly important during the unit installation process. The slip ring and carbon brush are prone to heat generation due to friction. Considering the excitation capacity and heat generation situation, spiral grooves are generally opened on the slip ring for ventilation to enhance the cooling effect, but this brings inconvenience to turning gear.

[0003] At present, the turning gear of pumped storage power station units generally adopts the method of manual turning gear. Manual turning gear is a method of using bolts to couple a turning gear tool to the end of the upper shaft and manually pushing the unit to rotate for turning gear. A dial indicator is installed at the slip ring to monitor the data of the slip ring. The specific steps are as follows:

[0004] Prepare for turning gear, uniformly number each measurement part, and debug the high-pressure oil jacking equipment.

[0005] Lift and install the turning gear support and place it at the end of the upper shaft.

[0006] Connect the turning gear support and the upper shaft by bolting.

[0007] Install the turning gear push rod.

[0008] Install dial indicators at each measurement part.

[0009] Start the high-pressure oil jacking device, manually push the unit to rotate for turning gear, and stop to read the data at each measurement point. For the monitoring of the slip ring with spiral grooves, the dial indicator cannot directly monitor and read the data. Only the pointer of the dial indicator can be pulled by hand. When the turning gear stops at the measurement position, then release the pointer to read the data.

[0010] This method is relatively simple and has good economy. However, since the turning gear tool is bolted to the shaft head, it occupies the installation position of the slip ring, and turning gear with the slip ring cannot be realized, and the swing and concentricity of the slip ring cannot be checked. There is no fixation between the push rod and the turning gear support, and there is a risk of the push rod falling off and causing injury. If the force of pulling the pointer of the dial indicator by hand is too large, it is easy to cause large measurement errors.

[0011] After the collector ring is installed, if you want to perform the turning inspection of the collector ring, the existing turning tools can no longer be used. You must find a way to rotate the unit from another place and perform the turning again, which is time-consuming and laborious. Summary of the Utility Model

[0012] The purpose of the present utility model is to provide a turning tool for a pumped-storage power station unit with a collector ring in order to solve the above technical problems. It realizes the turning of the pumped-storage power station unit with a collector ring and synchronously and conveniently checks the swing and concentricity of the collector ring.

[0013] The present utility model specifically adopts the following technical solutions to achieve the above purpose:

[0014] The present utility model provides a turning tool for a pumped-storage power station unit with a collector ring, including a collector ring support arranged on the upper end shaft, a plurality of collector rings sleeved on the collector ring support, a turning support arranged on the top of the collector ring support, and a fixed support arranged on one side of the collector ring support. A plurality of dial indicators for correspondingly measuring the concentricity of the plurality of collector rings are arranged on the fixed support. The number of the dial indicators is the same as the number of the collector rings and corresponds one by one. The pointers of the dial indicators are in contact with the corresponding collector rings.

[0015] Specifically, the readings of the corresponding collector rings are measured through the turning frame and the arranged dial indicators, and the swing (which can also be called concentricity) is calculated by the least squares method. It can realize one-time turning with a collector ring, monitor and collect the swing data of all parts to be monitored, save labor costs and shorten the construction period.

[0016] In one embodiment, the turning support is installed above the collector ring support, and the edge of the turning support is installed in a plurality of the collector rings through a locking mechanism. The locking mechanism includes wedge plates symmetrically arranged in the rotor lead copper bar mounting holes of the plurality of collector rings, and an adjusting screw and an adjusting nut passing through the turning support for locking the corresponding wedge plates.

[0017] Specifically, the turning support is placed above the collector ring support, and the wedge plates on both sides are to be inserted into the rotor lead copper bar mounting holes; the corresponding wedge plates are tightened through the adjusting screw and the adjusting nut to fix the turning frame.

[0018] Utilize the collector ring support to fix the turning tool through two pairs of adjustable wedge plates, manually turn the machine, and realize the inspection of the concentricity and roundness of the collector ring. The structure is simple, the operation is convenient, and the economy is good.

[0019] In one embodiment, sleeves are sleeved on the ends of the pointers of the dial indicators, and grease is applied at the positions where the sleeves are in contact with the corresponding collector rings.

[0020] Specifically, a method is creatively proposed to horizontally sleeved a small section of PVC casing on the pointer of the dial indicator to achieve the inspection of the concentricity and roundness of the slip ring with spiral grooves. The structure is simple, the operation is convenient, and the economy is good.

[0021] In one embodiment, a plurality of measuring parts are sequentially arranged on the fixed bracket from top to bottom, and corresponding dial indicators are detachably connected to each of the measuring parts through fastening bolt assemblies.

[0022] In one embodiment, spiral grooves are provided on each of the slip rings.

[0023] Specifically, at each measuring part, the fixed bracket is erected with a dial indicator through a fastening bolt assembly. For the measurement of the slip ring with spiral grooves, a PVC casing needs to be horizontally sleeved on the pointer of the dial indicator, and a small amount of lubricant is applied at the position where the casing contacts the slip ring to prevent the pointer of the dial indicator from jumping into the spiral grooves. Accurate acquisition of the data of the slip ring with spiral grooves during barring can be realized.

[0024] In one embodiment, the number of the slip rings is two, namely an upper slip ring and a lower slip ring.

[0025] In one embodiment, the barring bracket includes a support sleeve detachably connected to the slip ring bracket through screws, and a plurality of connecting rods evenly distributed in a circumferential direction on the top side wall of the support sleeve. Push rods are sleeved at the free ends of the connecting rods, and each push rod is locked with the corresponding connecting rod through a locking assembly.

[0026] In one embodiment, the locking assembly is a positioning pin.

[0027] In one embodiment, the number of the connecting rods is four evenly distributed in a circumferential direction on the top side wall of the support sleeve.

[0028] In one embodiment, the fixed bracket is L-shaped, and the bottom of the fixed bracket is arranged on the upper frame through a fixing bolt.

[0029] A method for using a barring tool for a pumped-storage power station unit with a slip ring is as follows:

[0030] S1. Barring preparation: uniformly number each measuring part (including the upper and lower rings of the slip ring), and debug and complete the high-pressure oil jacking equipment;

[0031] S2. Lift and install the barring frame, place it above the slip ring bracket, and insert the wedge plates on both sides into the installation holes of the rotor lead copper bars;

[0032] S3. Tighten the wedge plates by adjusting the screw and the adjusting nut to fix the barring frame;

[0033] S4. Install the push rods. Insert each push rod into the connecting rod of the barring gear support, and install a positioning pin for fixation.

[0034] S5. Use fixing bolts to mount the dial indicator on the fixed support at each measurement position. For the measurement of the slip ring with spiral grooves, a PVC sleeve needs to be horizontally sleeved on the pointer of the dial indicator, and a small amount of grease is applied at the position where the sleeve contacts the slip ring.

[0035] S6. Push the unit to rotate, turn on the high-pressure oil jacking device, and manually push the unit to rotate through the barring tooling. Stop and take readings at each measurement point to check the concentricity and roundness of the slip ring.

[0036] The beneficial effects of the present utility model are as follows:

[0037] 1. The design of the present utility model is reasonable, realizing synchronous barring of the slip ring, facilitating synchronous inspection of the concentricity and roundness of the slip ring. The structure is simple and the operation is convenient. After the slip ring is installed, the barring tool is fixed by using the slip ring support and two pairs of adjustable wedge plates to prevent the barring gear support from moving, and the push rod is fixed to the barring gear support by a positioning pin to prevent the push rod from falling off.

[0038] 2. For the slip ring with spiral grooves, it is creatively proposed to horizontally sleeve a small section of PVC sleeve on the pointer of the dial indicator. The sleeve is light in weight and does not affect the measurement accuracy of the dial indicator. A small amount of grease is applied at the position where the sleeve contacts the slip ring to reduce the friction between the sleeve and the slip ring and minimize the impact on the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0040] Figure 1 is the schematic cross-sectional structure diagram of the present utility model;

[0041] Figure 2 is Figure 1 the P-direction view of

[0042] Figure 3 is Figure 1 the K-direction view of

[0043] Reference numerals: 1 - barring gear support, 2 - wedge plate, 3 - adjusting screw, 4 - adjusting nut, 5 - push rod, 6 - positioning pin, 7 - dial indicator, 8 - sleeve, 9 - fixed support, 10 - fixing bolt. Detailed implementation manners

[0044] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. Components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0045] Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0046] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0047] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "inner", "outer", "upper", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0048] Embodiment 1

[0049] As Figures 1 to 3 shown, this embodiment provides a barring gear tool for a pumped-storage power station unit with a slip ring, which includes a slip ring bracket arranged on the upper end shaft, a plurality of slip rings sleeved on the slip ring bracket, a barring gear bracket 1 arranged on the top of the slip ring bracket, and a fixed bracket 9 arranged on one side of the slip ring bracket. A plurality of dial indicators 7 for correspondingly measuring the concentricity of the plurality of slip rings are arranged on the fixed bracket 9. The number of the dial indicators 7 is the same as the number of the slip rings and they correspond one by one. The pointers of the respective dial indicators 7 are in contact with the corresponding slip rings.

[0050] Specifically, the readings of the corresponding slip rings are measured through the turning gear frame and the installed dial indicator 7, and the deflection (also called concentricity) is calculated by the least square method. It can realize the first turning with the slip ring, monitor and collect the deflection data of all parts to be monitored, save labor costs and construction period.

[0051] Embodiment 2

[0052] As Figures 1 to 3 shown, this embodiment provides a turning tool for a pumped-storage power station unit with a slip ring, including a slip ring support arranged on the upper end shaft, a plurality of slip rings sleeved on the slip ring support, a turning gear frame 1 arranged on the top of the slip ring support, and a fixed support 9 arranged on one side of the slip ring support. A plurality of dial indicators 7 for correspondingly measuring the concentricity of the plurality of slip rings are arranged on the fixed support 9. The number of the dial indicators 7 is the same as that of the slip rings and corresponds one by one. The pointers of the dial indicators 7 are in contact with the corresponding slip rings.

[0053] The turning gear frame 1 is installed above the slip ring support. The edge of the turning gear frame 1 is installed in the plurality of slip rings through a locking mechanism. The locking mechanism includes wedge plates 2 symmetrically arranged in the rotor lead copper bar mounting holes of the plurality of slip rings, and an adjusting screw 3 and an adjusting nut 4 passing through the turning gear frame 1 for locking the corresponding wedge plates 2.

[0054] Specifically, the turning gear frame 1 is placed above the slip ring support, and the wedge plates 2 on both sides are to be inserted into the rotor lead copper bar mounting holes; by adjusting the screw 3 and the adjusting nut 4, the corresponding wedge plates 2 are tightened to fix the turning gear frame.

[0055] Using the slip ring support, the turning tool is fixed by two pairs of adjustable wedge plates 2, and the concentricity and roundness of the slip ring are checked by manual turning. The structure is simple, the operation is convenient, and the economy is good.

[0056] Embodiment 3

[0057] As Figures 1 to 3 shown, this embodiment provides a turning tool for a pumped-storage power station unit with a slip ring, including a slip ring support arranged on the upper end shaft, a plurality of slip rings sleeved on the slip ring support, a turning gear frame 1 arranged on the top of the slip ring support, and a fixed support 9 arranged on one side of the slip ring support. A plurality of dial indicators 7 for correspondingly measuring the concentricity of the plurality of slip rings are arranged on the fixed support 9. The number of the dial indicators 7 is the same as that of the slip rings and corresponds one by one. The pointers of the dial indicators 7 are in contact with the corresponding slip rings.

[0058] The barring gear support 1 is installed above the slip ring support. The edge of the barring gear support 1 is installed in a plurality of slip rings through a locking mechanism. The locking mechanism includes wedge plates 2 symmetrically arranged in the rotor lead copper bar mounting holes of the plurality of slip rings, and adjusting screws 3 and adjusting nuts 4 passing through the barring gear support 1 for locking the corresponding wedge plates 2.

[0059] A sleeve 8 is sleeved at the end of the pointer of each dial indicator 7, and grease is applied at the position where the sleeve 8 contacts the corresponding slip ring.

[0060] Specifically, a method of horizontally sleeving a small section of polyvinyl chloride sleeve 8 on the pointer of the dial indicator 7 is creatively proposed to realize the inspection of the concentricity and roundness of the slip ring with spiral grooves. The structure is simple, the operation is convenient, and the economy is good.

[0061] Embodiment 4

[0062] This embodiment is further optimized on the basis of any one of Embodiments 1 to 3. Specifically:

[0063] A plurality of measuring parts are sequentially arranged on the fixed support 9 from top to bottom, and the corresponding dial indicators 7 are detachably connected through fastening bolt assemblies at each measuring part.

[0064] Spiral grooves are provided on each slip ring.

[0065] Specifically, at each measuring part, the fixed support 9 is erected with a dial indicator 7 through a fastening bolt assembly. For the measurement of the slip ring with spiral grooves, a polyvinyl chloride sleeve 8 needs to be horizontally sleeved on the pointer of the dial indicator 7, and a small amount of lubricant is applied at the position where the sleeve 8 contacts the slip ring to prevent the pointer of the dial indicator 7 from jumping into the spiral grooves. The accurate acquisition of the barring data of the slip ring with spiral grooves can be realized.

[0066] Embodiment 5

[0067] This embodiment is further optimized on the basis of any one of Embodiments 1 to 4. Specifically:

[0068] The number of slip rings is two, namely an upper slip ring and a lower slip ring.

[0069] The barring gear support 1 includes a support sleeve detachably connected to the slip ring support by screws, and a plurality of connecting rods circumferentially distributed on the top side wall of the support sleeve. A push rod 5 is sleeved at the free end of each connecting rod, and each push rod 5 is locked with the corresponding connecting rod through a locking component.

[0070] The locking component is a positioning pin 6.

[0071] The number of connecting rods is four circumferentially distributed on the top side wall of the support sleeve.

[0072] The fixed support 9 is L-shaped, and the bottom of the fixed support 9 is arranged on the upper frame through the fixing bolts 10.

[0073] Embodiment 6

[0074] The present embodiment provides a method for using a barring tool for a pumped-storage power station unit with a slip ring as follows:

[0075] S1. Barring preparation: uniformly number each measurement part (including the upper and lower rings of the slip ring), and debug the high-pressure oil jacking equipment to completion;

[0076] S2. Lift and install the barring frame, place it above the slip ring support, and insert the wedge plates 2 on both sides into the installation holes of the rotor lead copper bars;

[0077] S3. By adjusting the screw 3 and the adjusting nut 4, tighten the wedge plate 2 to fix the barring frame;

[0078] S4. Install the push rod 5, insert each push rod 5 into the connecting rod of the barring support 1, and install the positioning pin 6 for fixation;

[0079] S5. Use the fixing bolts 10 to mount the dial indicators 7 on the fixed support 9 at each measurement part. For the measurement of the slip ring with spiral grooves, a PVC sleeve 8 needs to be horizontally sleeved on the pointer of the dial indicator 7, and a small amount of grease is applied at the position where the sleeve 8 contacts the slip ring;

[0080] S6. Push the unit to rotate, start the high-pressure oil jacking device, and manually push the unit to rotate for barring through the barring tool. Stop and take readings at each measurement point to check the concentricity and roundness of the slip ring.

Claims

1. A turning tool with a collector ring for a pumped storage power station unit, characterized in that: It comprises a collector ring bracket arranged on the upper end shaft, a plurality of collector rings sleeved on the collector ring bracket, a turning bracket (1) arranged on the top of the collector ring bracket, and a fixed bracket (9) arranged on one side of the collector ring bracket, wherein each of the fixed brackets (9) is provided with a plurality of dial indicators (7) for correspondingly measuring the concentricity of the plurality of collector rings, the number of the dial indicators (7) is the same as the number of the collector rings and corresponds one to one, and the pointer of each dial indicator (7) contacts the corresponding collector ring.

2. A turning tool with a collector ring for a pumped storage power station unit according to claim 1, characterized in that: The turning gear bracket (1) is installed above the collector ring bracket, and the edge of the turning gear bracket (1) is installed in the multiple collector rings through a locking mechanism. The locking mechanism includes a wedge plate (2) symmetrically arranged in the rotor lead copper bar mounting holes of the multiple collector rings, and an adjustment screw (3) and an adjustment nut (4) passing through the turning gear bracket (1) for locking the corresponding wedge plate (2).

3. The turning tool with collector ring of a pumped storage power station unit according to claim 1, characterized in that: The end of the pointer of each dial gauge (7) is sleeved with a sleeve (8), and grease is applied to the position where the sleeve (8) contacts the corresponding collector ring.

4. A turning tool with a collector ring for a pumped storage power station unit according to claim 3, characterized in that: The fixed bracket (9) is provided with a plurality of measuring parts in sequence from top to bottom, and each measuring part is detachably connected to a corresponding dial gauge (7) via a fastening bolt assembly.

5. The turning tool with collector ring for pumped storage power station unit according to claim 3, characterized in that: Each of the collector rings is provided with a spiral groove.

6. A turning tool with a collector ring for a pumped storage power station unit according to claim 1, characterized in that: The number of the collector rings is two, namely an upper collector ring and a lower collector ring.

7. The turning tool with collector ring for pumped storage power station unit according to claim 1, characterized in that: The turning gear support (1) comprises a support sleeve detachably connected to the collector ring support via screws, and a plurality of connecting rods evenly distributed on the top side wall of the support sleeve along a circumference, wherein a push rod (5) is sleeved on the free end of each connecting rod, and each push rod (5) is locked with the corresponding connecting rod via a locking assembly.

8. A turning tool with a collector ring for a pumped storage power station unit according to claim 7, characterized in that: The locking component is a positioning pin (6).

9. A turning tool with a collector ring for a pumped storage power station unit according to claim 7, characterized in that: The connecting rods are four evenly distributed on the top side wall of the supporting sleeve along the circumference.

10. A turning tool with a collector ring for a pumped storage power station unit according to claim 4, characterized in that: The fixing bracket (9) is L-shaped, and the bottom of the fixing bracket (9) is arranged on the upper frame via fixing bolts (10).

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