Mechanical hydraulic overload protection device
By using a mechanical hydraulic overload protection device, which combines a centrifugal detector and a mechanical trip unit with a counterweight assembly to balance the eccentric force, the safety hazards caused by turbine speed signal failure are resolved. This enables the safe shutdown of the turbine generator unit and prevents runaway, providing excellent protection.
Patent Information
- Application Number
- CN202420970111.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-07
Smart Images
Figure CN222315281U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydraulic systems, in particular to a mechanical hydraulic overload protection device. Background Art
[0002] When the speed of the turbine generator set increases to the overspeed protection set value, and at this time the speed signal device or power supply system and speed control system of the hydropower station fail, the speed regulation and shutdown of the turbine generator set cannot be achieved, which poses certain safety hazards. There is room for optimization in limiting the overspeed rotation of the main shaft and preventing the occurrence of runaway.
[0003] To this end, we propose a mechanical hydraulic overload protection device. Utility Model Content
[0004] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides a mechanical hydraulic overload protection device.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a mechanical hydraulic overload protection device, comprising a mounting ring, a centrifugal detector being detachably mounted on the wall of the mounting ring, a mounting plate fixedly mounted to the equipment being provided on the side of the mounting ring, a mechanical overspeed release facing the centrifugal detector being installed on the top of the mounting plate, the mounting ring being detachably mounted on the wall of the main shaft, the centrifugal detector and the mechanical overspeed release cooperating with each other to suppress the main shaft from rotating too fast and flying away, and a counterweight assembly for balancing being detachably mounted on the wall of the mounting ring.
[0006] As a preferred embodiment of the utility model, the mounting ring includes two half rings, which together form a circular ring adapted to the main shaft, and the cross-sections of the two half rings are fixedly connected with ear plates, and the wall surfaces of the ear plates are provided with mounting holes, and the two ear plates in relative positions are fastened by bolts to close the half rings.
[0007] As a preferred embodiment of the present invention, the centerline height of the centrifugal detector is at the same horizontal position as the mechanical overspeed release, and one side of the mechanical overspeed release coincides with the centerline of the centrifugal detector.
[0008] As a preferred embodiment of the utility model, the counterweight assembly includes a counterweight block, an extension body, a first clamping plate and a second clamping plate, the wall surface of the second clamping plate is provided with an adjustment groove, the extension body passes through the adjustment groove and is fixedly connected to the counterweight block, the second clamping plate is locked with the mounting ring by bolts, and the extension body and the second clamping plate can adjust the installation position of the counterweight block by cross-displacement along the extension body.
[0009] As a preferred embodiment of the utility model, the first clamping plate and the second clamping plate are rectangular rods with the same horizontal cross-section, the top surface of the mounting ring is provided with a rectangular groove adapted to the first clamping plate, the first clamping plate is embedded in the rectangular groove and extends to the top of the mounting ring, the wall surfaces of the first clamping plate and the second clamping plate are penetrated with an adjustment channel, the top surface of the mounting ring is provided with a threaded hole, and the bolt passes through the adjustment channel and is connected to the threaded hole of the mounting ring to press the first clamping plate and the second clamping plate together.
[0010] As a preferred embodiment of the present invention, the extension body is integrally formed with the counterweight block, and the length of the extension body is greater than the width of the second clamping plate and extends to the side of the second clamping plate.
[0011] As a preferred embodiment of the utility model, a plurality of latching teeth are provided on the bottom surface of the second clamping plate, and the latching teeth are cross-distributed. The top surfaces of the first clamping plate and the extension body are provided with recesses. The latching teeth of the second clamping plate can engage with the recesses of the extension body and the first clamping plate to lock the position of the counterweight block.
[0012] Beneficial Effects
[0013] The utility model provides a mechanical hydraulic overload protection device, which has the following beneficial effects:
[0014] 1. This mechanical hydraulic overload protection device controls the hydraulic system through a mechanical overspeed release, thereby closing the guide vane mechanism of an axial flow, mixed flow, or cross-flow type hydro-turbine generator set or the deflector of an impulse type hydro-turbine generator set, thereby shutting down the unit, preventing the unit from running away, ensuring the safe operation of the hydro-turbine generator, and having a better protection effect.
[0015] 2. This mechanical hydraulic overload protection device pulls the counterweight block to drive the extension body to adjust the X-axis installation position and the Z-axis installation position of the counterweight block before the second clamping plate is fitted with the first clamping plate, aligns the adjustment groove of the second clamping plate with the extension body and falls, and the locking teeth on the bottom surface of the second clamping plate along the X-axis and Z-axis directions are respectively engaged with the recesses on the top surface of the first clamping plate and the extension body, and the position of the counterweight block is locked by passing the bolt through the adjustment channel and locking it with the mounting ring. The counterweight block can adjust the installation position within a certain range, thereby balancing the eccentric force caused by the rotation of the centrifugal detector installed on the mounting ring, so that the mounting ring maintains a more stable circular motion, which is easy to install and debug. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is the main plan view of the utility model;
[0017] Figure 2 This is a top plan view of the utility model;
[0018] Figure 3 It is a stereogram of the installation ring of the utility model;
[0019] Figure 4 This is a three-dimensional diagram of the counterweight assembly of the utility model;
[0020] Figure 5 It is a stereoscopic diagram of the counterweight block, the extension body and the first clamping plate 22 of the utility model.
[0021] Legend: 10. Mounting ring; 11. Centrifugal detector; 12. Mechanical overspeed release; 13. Mounting plate; 20. Counterweight; 21. Extension body; 22. First clamping plate; 23. Second clamping plate; 24. Adjustment channel. DETAILED DESCRIPTION
[0022] A mechanical hydraulic overload protection device, such as Figure 1 and Figure 2As shown, it includes a mounting ring 10, a centrifugal detector 11 is detachably mounted on the wall of the mounting ring 10, a mounting plate 13 fixedly mounted to the equipment is provided on the side of the mounting ring 10, a mechanical overspeed release 12 facing the centrifugal detector 11 is installed on the top of the mounting plate 13, the mounting ring 10 is detachably mounted on the wall of the spindle, the centrifugal detector 11 and the mechanical overspeed release 12 cooperate with each other to suppress the spindle from rotating too fast and flying away, a counterweight assembly for balancing is detachably mounted on the wall of the mounting ring 10, and the mounting ring 10 includes two half rings, which together form a circular ring adapted to the spindle, and the two half rings are connected to the spindle. The cross-section of the half ring is fixedly connected with an ear plate, and the wall of the ear plate is provided with a mounting hole. The two ear plates at opposite positions are locked by bolts to close the half ring. The centerline height of the centrifugal detector 11 is at the same horizontal position as the mechanical overspeed release 12. One side of the mechanical overspeed release 12 coincides with the centerline of the centrifugal detector 11. Before installation, it must be ensured that the mounting ring 10 installed on the main shaft is perpendicular to the main shaft of the turbine. If the main shaft of the unit is not processed with a stop, it should be ensured that the plane of the mounting ring 10 is perpendicular to the main shaft of the turbine by drawing a line on the main shaft before installation. Before installation, the mounting ring 10 must be installed on the main shaft. 0. Clean the anti-rust protective oil on the inner surface (the surface that matches the main shaft) of the mounting ring 10, then install the counterweight assembly and the centrifugal detector 11 on the corresponding two semicircular rings of the mounting ring 10 respectively, and then vertically install the two semicircular rings on the selected position on the main shaft of the turbine. Note that the sides with the same serial number on the two semicircular rings of the mounting ring 10 must be combined together, and the side with the serial number must face upward; the mounting bolts of the mechanical overspeed release 12 (installed by the owner according to the on-site conditions, and there should be enough space for the protector to complete manual reset) cannot be fully tightened to facilitate subsequent adjustments. During installation, the center height of the hydraulic valve of the centrifugal detector 11 is required to be at the same height as the mechanical overspeed release 12, and at the same time, one side of the mechanical overspeed release 12 coincides with the center line of the main shaft, and then the bolts are tightened; the installation of the mounting ring 10, the centrifugal detector 11 and the mechanical overspeed release 12 is realized, and the hydraulic system is controlled by the mechanical overspeed release 12, so as to close the guide vane mechanism of the axial flow, mixed flow, cross-flow type hydro-turbine generator set or the deflector of the impulse type hydro-turbine generator set, realize the unit shutdown, prevent the unit from running away, ensure the safe operation of the hydro-turbine generator, and have a better protection effect.
[0023] like Figure 3 , Figure 4 and Figure 5As shown, the counterweight assembly includes a counterweight block 20, an extension body 21, a first clamping plate 22 and a second clamping plate 23. The wall surface of the second clamping plate 23 is provided with an adjustment groove. The extension body 21 passes through the adjustment groove and is fixedly connected to the counterweight block 20. The second clamping plate 23 is locked with the mounting ring 10 by bolts. The extension body 21 and the second clamping plate 23 can realize cross-displacement adjustment of the installation position of the counterweight block 20 along the extension body 21. The first clamping plate 22 and the second clamping plate 23 are rectangular rods with the same horizontal cross-section. The top surface of the mounting ring 10 is provided with a There is a rectangular groove adapted for the first clamping plate 22, the first clamping plate 22 is embedded in the rectangular groove and extends to the top of the mounting ring 10, the wall surface of the first clamping plate 22 and the second clamping plate 23 is penetrated with an adjustment channel 24, the top surface of the mounting ring 10 is provided with a threaded hole, the bolt passes through the adjustment channel 24 and is connected with the threaded hole of the mounting ring 10 to press the first clamping plate 22 and the second clamping plate 23, the extension body 21 is integrally formed with the counterweight 20, the length of the extension body 21 is greater than the width of the second clamping plate 23 and extends to the side of the second clamping plate 23, The bottom surface of the second clamping plate 23 is provided with a plurality of latching teeth, which are arranged in a cross shape. The top surfaces of the first clamping plate 22 and the extension body 21 are both provided with notches. The latching teeth of the second clamping plate 23 can engage with the notches of the extension body 21 and the first clamping plate 22 to lock the position of the counterweight block 20. In this solution, before the second clamping plate 23 is attached to the first clamping plate 22, the counterweight block 20 is pulled to drive the extension body 21 to adjust the installation position of the counterweight block 20 in the X-axis direction and the installation position in the Z-axis direction, and the adjustment groove of the second clamping plate 23 is aligned with the extension body 21. The body 21 falls, and the teeth on the bottom surface of the second clamping plate 23 along the X-axis and Z-axis directions are respectively engaged with the recesses on the top surface of the first clamping plate 22 and the extension body 21. The bolts are passed through the adjustment channel 24 and locked with the mounting ring 10 to lock the position of the counterweight 20. The counterweight 20 can adjust the installation position within a certain range, thereby balancing the eccentric force caused by the rotation of the centrifugal detector 11 installed on the mounting ring 10, so that the mounting ring 10 maintains a more stable circular motion, which is easy to install and debug.
[0024] The working principle of the utility model is as follows: before the second clamping plate 23 is fitted with the first clamping plate 22, the counterweight 20 is pulled to drive the extension body 21 to adjust the installation position of the counterweight 20 in the X-axis direction and the installation position in the Z-axis direction, the adjustment groove of the second clamping plate 23 is aligned with the extension body 21 and dropped, and the bottom surface of the second clamping plate 23 is respectively engaged with the first clamping plate 22 and the recess of the top surface of the extension body 21 along the X-axis and Z-axis directions, and the bolt is passed through the adjustment channel 24 and locked with one of the half rings of the mounting ring 10 to achieve the position locking of the counterweight 20. The installation position of the counterweight 20 can be adjusted within a certain range, and then the centrifugal detector 11 is installed on the other half of the mounting ring 10. The installation bolts of the mechanical overspeed release 12 (installed by the owner according to the on-site conditions, and there should be enough space for the protector to complete manual reset) cannot be completely tightened;
[0025] When tightening the bolts, the torque wrench and other tools must be used for strict control, and the tightening torque must not be less than or exceed the following: 120 Newton meters (120 N.M) ±2%. The model of the centrifugal detector 11 is the detector TCQ, and the model of the mechanical overspeed release 12 is the overspeed protector BHQ.
[0026] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A mechanical hydraulic overload protection device, characterized in that: The invention comprises a mounting ring (10), a centrifugal detector (11) being detachably mounted on the wall surface of the mounting ring (10), a mounting plate (13) being fixedly mounted on the device being provided on the side of the mounting ring (10), a mechanical overspeed release (12) being mounted on the top of the mounting plate (13) facing the centrifugal detector (11), the mounting ring (10) being detachably mounted on the wall surface of the main shaft, the centrifugal detector (11) and the mechanical overspeed release (12) cooperating with each other to suppress the main shaft from rotating too fast and thus flying away, and a counterweight assembly for balancing being detachably mounted on the wall surface of the mounting ring (10).
2. The mechanical hydraulic overload protection device according to claim 1, characterized in that: The mounting ring (10) comprises two half rings, which together form a circular ring adapted to the main shaft, and the sections of the two half rings are fixedly connected with ear plates, and the wall surfaces of the ear plates are provided with mounting holes, and the two ear plates at relative positions are locked by bolts so that the half rings are closed.
3. The mechanical hydraulic overload protection device according to claim 1, characterized in that: The centerline height of the centrifugal detector (11) is at the same horizontal position as the mechanical overspeed release (12), and one side of the mechanical overspeed release (12) coincides with the centerline of the centrifugal detector (11).
4. The mechanical hydraulic overload protection device according to claim 1, characterized in that: The counterweight assembly comprises a counterweight block (20), an extension body (21), a first clamping plate (22) and a second clamping plate (23); an adjustment groove is provided on the wall surface of the second clamping plate (23); the extension body (21) passes through the adjustment groove and is fixedly connected to the counterweight block (20); the second clamping plate (23) is locked with the mounting ring (10) by bolts; the extension body (21) and the second clamping plate (23) can realize cross displacement adjustment of the mounting position of the counterweight block (20) along the extension body (21).
5. The mechanical hydraulic overload protection device according to claim 4, characterized in that: The first clamping plate (22) and the second clamping plate (23) are rectangular rods with the same horizontal cross-section. The top surface of the mounting ring (10) is provided with a rectangular groove adapted to the first clamping plate (22). The first clamping plate (22) is embedded in the rectangular groove and extends above the mounting ring (10). The wall surfaces of the first clamping plate (22) and the second clamping plate (23) are penetrated by an adjustment channel (24). The top surface of the mounting ring (10) is provided with a threaded hole. Bolts pass through the adjustment channel (24) and are connected to the threaded hole of the mounting ring (10) to press the first clamping plate (22) and the second clamping plate (23) tightly.
6. The mechanical hydraulic overload protection device according to claim 4, characterized in that: The extension body (21) and the counterweight block (20) are integrally formed, and the length of the extension body (21) is greater than the width of the second clamping plate (23) and extends to the side of the second clamping plate (23).
7. The mechanical hydraulic overload protection device according to claim 4, characterized in that: The bottom surface of the second clamping plate (23) is provided with a plurality of latching teeth, which are arranged in a cross pattern. The top surfaces of the first clamping plate (22) and the extension body (21) are both provided with notches. The latching teeth of the second clamping plate (23) can engage with the notches of the extension body (21) and the first clamping plate (22) to lock the position of the counterweight (20).