A multifunctional flywheel energy storage and braking system for a low-speed engine bearing test platform

Abstract

The purpose of the present invention is to provide a multifunctional flywheel energy storage and braking system for a low-speed engine bearing test platform, including a transmission shaft, a multifunctional flywheel, a left seat support bearing, a right seat support bearing, a safety brake, and a wedge-shaped base. A flywheel shear positioning key is installed on the transmission shaft, and the flywheel shear positioning key is locked by a flywheel locking bolt. The transmission shaft and the multifunctional flywheel are assembled by a thermal assembly process to form a flywheel module; the left seat support bearing is installed on the left bearing support base, and the right seat support bearing is installed on the right bearing support base, and are locked by bolts respectively; the safety brake is connected to the wedge-shaped base to form a safety module, and the safety module is installed on the left side of the flywheel module. The present invention absorbs system energy at high torque and releases torque energy at low torque, thereby improving the uniformity of torque balance on the shaft system of the low-speed engine bearing transmission system.

Description

Technical Field

[0001] The invention relates to a bearing bush testing machine, in particular to a flywheel energy storage braking system for bearing bush testing. Background Art

[0002] The crank-connecting rod mechanism in a high-power marine low-speed diesel engine is the core moving part of the diesel engine. During the rotation of the diesel engine, the main bearing and connecting rod bearing are the most important rotating friction pairs in the diesel engine. The friction loss of these two bearings accounts for more than 5% of the friction loss of the entire diesel engine. Therefore, the bearing is often listed as one of the key parts in the low-speed engine. Due to the complex structure of the low-speed engine, the large size of the parts, and the bearing in the structural design, product processing, parts installation and commissioning, maintenance and inspection, etc., will have a great impact on the performance of the bearing, which will cause the equipment to vibrate during operation, increase the local oil film pressure, increase the friction, and flash the lubricating oil. The intense flash impact pressure can easily cause fatigue pitting and peeling of the bearing alloy layer, and even cause major accidents. Therefore, personnel from various countries have invested a lot of time and experience in research in this field. The main way and method is to build a similar load simulation test bench and calculate the bearing performance through the simulation calculation software platform, and predict and evaluate the operating performance, fatigue damage performance and other indicators of the bearing.

[0003] At present, the solutions for eliminating imbalance in large rotating systems are mainly divided into: 1. Find the imbalance point of the rotating equipment in the transmission system, and in the opposite direction of the imbalance point, add unbalanced blocks and other means, and install and use it after the dynamic balance check of the transmission system; 2. Another method is to install flywheels and shock absorbers at the input or output end of the equipment, absorb system energy at high torque, release torque energy at low torque, improve the stability of the torque load of the transmission system, and eliminate small and messy unbalanced torques on the transmission system. Because the flywheel has a simple structural design, easy installation, significantly improves the stability of the system torque, and can also absorb and store energy, flywheels are often the first choice for rotating machinery balancing systems. Summary of the invention

[0004] The purpose of the present invention is to provide a multifunctional flywheel energy storage and braking system for a low-speed engine bearing test platform, which absorbs system energy at high torque, releases torque energy at low torque, and improves the uniformity of torque balance on the shaft system of the low-speed engine bearing transmission system.

[0005] The object of the present invention is achieved in that:

[0006] The present invention discloses a multifunctional flywheel energy storage and braking system for a low-speed engine bearing test platform, which is characterized in that it includes a transmission shaft, a multifunctional flywheel, a left-side seat support bearing, a right-side seat support bearing, a safety brake, and a wedge-shaped base. A flywheel shear locating key is installed on the transmission shaft, and the flywheel shear locating key is locked by a flywheel locking bolt. The transmission shaft and the multifunctional flywheel are assembled by a thermal assembly process to form a flywheel module; the left-side seat support bearing is installed on the left-side bearing support base, and the right-side seat support bearing is installed on the right-side bearing support base, and they are locked by bolts respectively; the safety brake is connected to the wedge-shaped base to form a safety module, and the safety module is installed on the left side of the flywheel module.

[0007] The present invention may also include:

[0008] 1. A position sensor for detecting whether the jaws are closed is installed on the jaws of the safety brake.

[0009] 2. The jaws of the safety brake are provided with adjusting bolts for adjusting the distance between the jaw wear-resistant plate and the safety brake wing plate.

[0010] 3. The left-side seat support bearing and the right-side seat support bearing are self-aligning bearings.

[0011] The advantages of the present invention are:

[0012] 1. As this set of tools adopts modular manufacturing and assembly technology, after the components of each tool are assembled externally, they are transported to the installation base and assembled one by one, which is convenient for personnel operation and torque application.

[0013] 2. This flywheel balancing system absorbs system energy at high torque and releases torque energy at low torque, thereby improving the uniformity of torque balance on the shaft system of the low-speed engine bearing transmission system; at the same time, a brake wing plate is designed on the flywheel, which cooperates with the hydraulic brake jaws to close the jaws to safely shut down the system in the event of an abnormal situation, thereby ensuring safe operation of the system.

[0014] 3. In the flywheel balancing system, the flywheel drive shaft module is installed in the seat bearing module, and the supporting bearing adopts a self-aligning bearing to ensure the stability of the flywheel system axis, reduce system vibration, and ensure safe and stable operation of the system.

[0015] 4. The brake caliper in this system adopts hydraulic braking, and there is a displacement sensor at the brake caliper, which can identify whether the caliper is in the braking state, and has the function of marking the brake state of the caliper. At the same time, there is a crowbar hole on the multi-functional flywheel, and the crowbar can be inserted into the hole to manually drive the system for turning. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a positive attempt of the present invention;

[0017] Figure 2 A top view of the present invention;

[0018] Figure 3 is a side view of the present invention;

[0019] Figure 4 It is AA view;

[0020] Figure 5 This is the flywheel module view;

[0021] Figure 6 This is the view of the bearing support module;

[0022] Figure 7 A view of the flywheel module with the support seat assembled;

[0023] Figure 8 A positive attempt for the security module;

[0024] Fig. 9 This is a top view of the safety module;

[0025] Fig.10 This is a side view of the safety module. DETAILED DESCRIPTION

[0026] The present invention is described in more detail below with reference to the accompanying drawings:

[0027] Combination Figure 1-10 The main purpose of the present invention is to provide a multifunctional flywheel energy storage and braking system for a low-speed engine bearing test platform. Through the inventive device, a torque balancing system can be provided for the low-speed engine bearing test platform transmission system. The flywheel balancing system absorbs system energy at high torque and releases torque energy at low torque, thereby improving the uniformity of torque balance on the shaft system of the low-speed engine bearing transmission system. At the same time, a brake wing plate is designed on the flywheel. Through the cooperation of the wing plate and the hydraulic brake jaws, the jaws can be closed to shut down the system safely when an abnormal situation occurs, thereby ensuring the safe operation of the system.

[0028] The multifunctional flywheel energy storage and braking system of a low-speed engine bearing test platform of the present invention mainly comprises: a transmission shaft 1, a left-side seat support bearing 2, a multifunctional flywheel 3, a right-side seat support bearing 4, a right-side bearing support base 5, a right-side bearing support base 6, a base connecting bolt 7, a safety brake wedge base 8, a safety brake module connecting nut 9, a safety brake module connecting bolt 10, a safety brake module base mounting bolt 11, a seat bearing seat mounting bolt 12, a safety brake 13, a flywheel shear positioning key 14, and a flywheel locking bolt 15.

[0029] First, the flywheel shear positioning key 14 is installed on the transmission shaft 1 and locked with a bolt. Then, the transmission shaft 1 and the multifunctional flywheel 3 are assembled by a hot assembly process in a heating furnace preheated at 120° to form a flywheel module.

[0030] The left and right bearing support bases 6 and 5 are first installed in the fixed position of the base according to the position of the positioning pin, and are locked on the base with bolts. Then the left and right seat support bearings 2 and 4 are installed on the bearing support bases 6 and 5 on both sides, and the two seat bearings are locked with bolts. When the flywheel module is hoisted, the upper cover of the seat bearing seat is first removed. After the flywheel module is hoisted, the upper cover of the seat bearing is reinstalled to support the entire flywheel module.

[0031] The safety brake 13 is first connected to the wedge-shaped base to form a safety module, and then installed on the left side of the flywheel module according to the predetermined position, so that the safety brake can be well stressed. At the same time, a position sensor is installed on the jaws of the safety brake to detect whether the jaws are closed and give an indication of the jaws actuation status.

[0032] The flywheel module is provided with lifting screw holes, which are located on both sides of the flywheel, so that both sides of the flywheel system are balanced during lifting, ensuring the safety of the flywheel drive shaft module lifting.

[0033] The jaws on the safety brake 13 are provided with an adjusting bolt for adjusting the distance between the jaw wear-resistant plate and the safety brake wing plate. The distance between the jaw wear-resistant plates can be adjusted by the adjusting bolt to ensure that the jaws on both sides contact the safety brake wing plate at the same time when the jaws are actuated, thereby reducing the axial load of the flywheel system and ensuring safe and stable operation of the system.

[0034] The system mainly adopts the modular design method. Its assembly is also to first divide the module into three small assemblies, which are assembled separately and then transported to the installation base for assembly. 1. First install the flywheel shear positioning key 14 on the transmission shaft 1 and lock the key with bolts. Then assemble the transmission shaft 1 and the multifunctional flywheel 3 through the hot assembly process to assemble into a flywheel module. The assembled structure is as follows: Figure 5 As shown; 2. The left and right bearing support bases 6 and 5 are first installed in the fixed position with the base according to the position of the positioning pin, and are locked on the base with bolts. Then the left and right seat support bearings 2 and 4 are installed on the bearing support bases on both sides, and the two seat bearings are locked with bolts. The assembled structure is as shown Figure 6 3. When the flywheel module is hoisted, first remove the upper cover of the bearing seat. After the flywheel module is hoisted, reinstall the upper cover of the bearing seat to support the entire flywheel module. The assembled structure is as follows Figure 74. The safety brake 8 is first connected to the wedge-shaped base to form a safety module, and then installed on the left side of the flywheel module according to the predetermined position, so that the safety brake can be well stressed, and finally the hydraulic brake module is installed. Figure 8 As shown, the overall system is completed with the joints as shown Figure 1-4 shown.

[0035] This system combines the flywheel and the brake system into one. While the flywheel balances the system torque, the brake pads set on the edge of the flywheel cooperate with the brake caliper. When the system detects abnormal operation, the brake caliper can be released to start the system braking to ensure the safe operation of the equipment. The flywheel module in this system is supported by a self-aligning bearing. The real-time self-alignment of the self-aligning bearing can greatly balance the impact caused by the uneven rotation of the system due to uneven mass during system rotation, ensuring that the axis rotates evenly when the flywheel rotates; the multifunctional flywheel 3 and the transmission shaft 1 are connected by a key positioning connection. The key connection can improve the torsional stiffness between the flywheel and the transmission shaft, ensuring that all the safety braking torque can be actuated to all the transmission shafts of the transmission system during the safe braking time; the multifunctional flywheel 3 is forged by an integrated steel plate die blank. The die blank has good uniformity and no defects such as slag inclusions and internal cracks. The flywheel system has excellent dynamic balancing performance, and the comprehensive mechanical strength meets the system use requirements, which can fully achieve the system rapid shutdown under rated speed and load conditions.

[0036] Since the actuation load end of this system is similar to a single-cylinder diesel engine system, the torque of the transmission shaft system is extremely unbalanced. First, during the design, at the bearing load test end, the eccentric shaft is subjected to bidirectional actuation to balance its torque as much as possible; secondly, the flywheel system is designed at the front end of the core module input, and the flywheel system absorbs system energy at high torque and releases torque energy at low torque, thereby improving the uniformity of torque balance on the shaft system of the low-speed bearing transmission system; finally, in addition to being used as a system stabilizing torque, the flywheel system can also be equipped with a brake pad device on the edge of the flywheel. Through such modification, the flywheel can be used as a brake device. When a safety failure occurs in the system, the speed can be gradually reduced according to the program settings and the safety shutdown sequence. When the speed drops to 50r / min, the safety brake is released and stopped. Emergency braking can also be performed in the event of a major safety failure to ensure the safe operation of the system.

Claims

1. A multifunctional flywheel energy storage and braking system for a low-speed engine bearing test platform. Its characteristics are: It includes a transmission shaft, a multifunctional flywheel, a left-side seat support bearing, a right-side seat support bearing, a safety brake, and a wedge-shaped base. A flywheel shear locating key is installed on the transmission shaft, and the flywheel shear locating key is locked by a flywheel locking bolt. The transmission shaft and the multifunctional flywheel are assembled by a thermal assembly process to form a flywheel module; the left-side seat support bearing is installed on the left-side bearing support base, and the right-side seat support bearing is installed on the right-side bearing support base, and are locked by bolts respectively; the safety brake is connected to the wedge-shaped base to form a safety module, and the safety module is installed on the left side of the flywheel module; a position sensor for detecting whether the jaws are closed is installed on the jaws of the safety brake; an adjustment bolt for adjusting the distance between the jaw wear-resistant plate and the safety brake wing plate is provided on the jaws of the safety brake; the left-side seat support bearing and the right-side seat support bearing are self-aligning bearings.

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