CN205483529U - A hydraulic pressure loader that is used for novel constant speed drive shaft to twist reverse fatigue test platform - Google Patents

Abstract

The utility model relates to a hydraulic pressure loader that is used for novel constant speed drive shaft to twist reverse fatigue test platform, including the cylinder, be equipped with the piston rod in the cylinder, be equipped with moving plate and still on the cylinder, be equipped with the jar room between cylinder and the piston rod, cylinder one side is equipped with preceding cylinder cap, and the opposite side is equipped with back cylinder cover, the cylinder upper end is equipped with branch oil clot and electro hydraulic servo valve, divide the oil clot to be located between electro hydraulic servo valve and the back cylinder cover, the cylinder lower extreme is equipped with lets out oil pipe, be equipped with the sealing washer between cylinder and preceding cylinder cap, the back cylinder cover, piston rod one end is equipped with angle sensor, lower end of the piston rod is equipped with deep groove ball bearing, the utility model discloses a hydraulic pressure loader of test bench can be used to the symmetry circulation and the non -symmetrical cycle twists reverse the moment of torsion loading among the fatigue test.

Description

Hydraulic loader for a new constant velocity drive shaft torsional fatigue test rig

technical field

The utility model relates to the field of fatigue test benches, in particular to a hydraulic loader used for a novel constant-velocity drive shaft torsion fatigue test bench.

Background technique

With the gradual development and expansion of the automobile industry, the testing and testing of auto parts has been raised to a considerable height. If there is no corresponding testing method and qualified test report for the production of any kind of auto parts, it will definitely affect the whole The driving safety of the car has caused irreparable losses, not to mention that in addition to domestic sales, many of the current products are sold to foreign countries for export, which requires strict inspection and testing. The research and development of this equipment is to provide testing methods and verification reports for automobile constant velocity drive shaft products, so that manufacturers can produce a large number of high-quality and qualified products, which are sold well all over the world. The research and development of this machine will play a very important role in the development and growth of the manufacturer, facing the world, and at the same time, the economic benefits brought are also very considerable.

The constant velocity drive shaft of a car is a key component in the driving process of the car. Its quality and performance directly affect the driving safety. This loader can be used for dynamic torsional fatigue tests on various shafts and rods. It is suitable for the torsional fatigue performance test of automobile transmission shaft assembly, constant velocity universal joint, ball cage, automobile half shaft, torsion bar, automobile drive axle housing and other components composed of short handle (or long handle) moving joint and fixed joint .

Utility model content

In view of the above-mentioned shortcomings in the prior art, the utility model provides a hydraulic loader for a new constant-velocity drive shaft torsional fatigue test bench, which can be used for torque loading in the torsional fatigue test of a constant-velocity drive shaft.

In order to achieve the above object, the utility model adopts the following technical solutions:

A hydraulic loader for a new type of constant velocity drive shaft torsional fatigue test bench, including a cylinder, a piston rod is arranged inside the cylinder, a moving plate and a static plate are arranged on the cylinder, and the cylinder and the piston rod There is a cylinder chamber between them; one side of the cylinder is provided with a front cylinder cover, the other side is provided with a rear cylinder cover, the upper end of the cylinder is provided with an oil distribution block and an electro-hydraulic servo valve, and the oil distribution block is located at Between the electro-hydraulic servo valve and the rear cylinder head, a drain pipe is provided at the lower end of the cylinder; a sealing ring is provided between the cylinder, the front cylinder head and the rear cylinder head, and an angle is provided at one end of the piston rod. sensor, the lower end of the piston rod is provided with a deep groove ball bearing.

As a preferred technical solution of the present utility model, multiple sets of moving plates and multiple sets of static plates are provided on the cylinder.

As a preferred technical solution of the present utility model, two sets of moving plates and two sets of static plates are provided on the cylinder, the two sets of stationary plates are arranged oppositely, and the two groups of moving plates are arranged oppositely.

As a preferred technical solution of the present utility model, the cylinder chamber is connected with an oil tank, and a filter is provided between the cylinder chamber and the oil tank, and the pore diameter of the filter is less than 6 μm.

As a preferred technical solution of the utility model, the cylinder chamber is connected with an accumulator.

The hydraulic loader of the utility model for the torsional fatigue test bench of the new constant-velocity drive shaft includes a cylinder, a piston rod is arranged inside the cylinder, a moving piece and a static piece are arranged on the cylinder, and the cylinder A cylinder chamber is provided between the barrel and the piston rod; the front cylinder cover is provided on one side of the cylinder barrel, the rear cylinder cover is arranged on the other side, and an oil separator block and an electro-hydraulic servo valve are arranged on the upper end of the cylinder barrel. The oil distribution block is located between the electro-hydraulic servo valve and the rear cylinder head, and the lower end of the cylinder barrel is provided with an oil drain pipe; a sealing ring is arranged between the cylinder barrel, the front cylinder head, and the rear cylinder head, and the piston rod An angle sensor is provided at one end, and a deep groove ball bearing is provided at the lower end of the piston rod. The loader of the utility model can be used for torque loading in a torsional fatigue test of a constant speed drive shaft.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the utility model more clearly, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the utility model , for those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative work.

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic cross-sectional view of the utility model.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figures 1 to 2, the utility model provides a hydraulic loader for a new type of constant-velocity drive shaft torsional fatigue test bench, including a cylinder 1, a piston rod 2 is provided in the cylinder 1, and a moving piece is provided on the cylinder 1 3 and static piece 4, a cylinder chamber 5 is provided between the cylinder 1 and the piston rod 2; a front cylinder cover 6 is provided on one side of the cylinder 1, a rear cylinder cover 7 is provided on the other side, and a branch is provided at the upper end of the cylinder 1. The oil block 8 and the electro-hydraulic servo valve 9, the oil distribution block 8 is located between the electro-hydraulic servo valve 9 and the rear cylinder head 7, and the lower end of the cylinder barrel 1 is provided with an oil drain pipe 10; the cylinder barrel 1 and the front cylinder head 6 and the rear cylinder head 7 is provided with a sealing ring, one end of the piston rod 2 is provided with an angle sensor 11, and the lower end of the piston rod 2 is provided with a deep groove ball bearing 12. Torque loading is realized by driving the piston rod 2 to rotate through the moving plate 3 .

In this embodiment, the cylinder 1 is provided with multiple groups of moving plates 3 and multiple groups of static plates 4, further, the cylinder 1 is provided with two groups of moving plates 3 and two groups of static plates 4, and the two groups of static plates 4 are opposite to each other. Set, two groups of moving pieces 3 are relatively set.

In this embodiment, the cylinder chamber 5 is connected with an oil tank, and a filter is provided between the cylinder chamber 5 and the oil tank, and the filter has a pore size less than 6 μm, which can ensure the safe and reliable operation of the servo valve. The oil is filtered to ensure the cleanliness of the hydraulic oil in the oil tank.

In this embodiment, the cylinder chamber 5 is connected with an accumulator, specifically, an accumulator is installed on the main inlet and outlet pipeline of the hydraulic oil to reduce the impact of pressure and flow pulsation, and on the oil circuit delivered to the actuator, An accumulator is installed on the oil inlet and outlet to reduce the impact of hydraulic shock on the test. In order to prevent the oil temperature of the hydraulic system from being too high and not work normally, we have equipped the user with a counter-flow drying water tower to cool the hydraulic oil through circulating water cooling to ensure normal operation.

In this embodiment, the test bench is also connected with a servo control system, the servo control system is a PMAC servo control system, the servo control system includes a torque amplifier and a torque controller board, and the torque amplifier is connected to the torque controller board and the torque controller board respectively. The torque sensor is connected, and the dynamic electro-hydraulic servo control technology is used to realize the full digital closed-loop control. The main measurement channel adopts the AC amplifier, wide range, no classification, continuous whole-process measurement, and the large-scale programmable gate array (FPGA) hardware is used in real time. The principle of tracking and integral accumulation (Σ-Δ) adopts synchronous acquisition and data preprocessing, and more specifically, it adopts the main control device of PMAC company in the United States. PMAC servo control system is a multifunctional comprehensive test system. Combined with our newly developed and currently advanced servo control system, the functions of each unit can be strengthened, and each unit is independent. The burden of the main control computer is reduced, and the speed of the main control computer is improved. In addition, the computer is used as the human-machine interface, which makes the operation very intuitive and convenient. In addition to some basic cards necessary for the control system, other function cards can be flexibly selected according to user needs, and the installation is convenient. The system can realize multiple closed-loop controls such as torque and rotation angle. The computer can automatically collect, process, display, and print data and test results, and has alarm and interlock functions.

In this embodiment, the working principle of the servo control system: a differential closed-loop servo control system is used. The control instruction signal output by the signal source and the controlled feedback signal selected by the "control state" generate an error signal in the comparator. The error signal is sent to the servo valve driver after being adjusted by P, I, and D, and the servo valve is controlled to push the oil cylinder to move in the direction required by the command to reduce the error and tend to the target of the control command. The whole control process is that the regulator continuously adjusts the output of the driver to minimize the error between the corresponding feedback signal and the set signal. The feedback signal (that is, the control object) can be selected from load and displacement.

In this embodiment, a strong current control system is also included. The strong current control system is connected to the test bench, the hydraulic system and the servo control system respectively. Further, the strong current control system includes a motor start control circuit, an oil source alarm circuit, and a status display circuit. and a PLC programmable controller, the PLC programmable controller is respectively connected with the motor start control circuit, the oil source alarm circuit, and the status display circuit, specifically the strong current control system has a motor start control circuit, an oil source alarm circuit, Status display circuit. The motor start control circuit is composed of start, stop, emergency stop and other circuits; the oil source alarm circuit is composed of temperature overrun alarm, oil filter clogging alarm, pressure alarm circuit, etc. All logical relationships are realized through the industrial computer.

In this embodiment, a computer data processing system is also included, the computer data processing system includes an industrial control computer and a printer, the computer data processing system is connected to the strong current control system, specifically, the computer system is composed of an industrial control computer and a management , application software, printers, etc. The electronic control system of the testing machine is used to control start, stop and various actions. The computer system is mainly responsible for the collection and processing of test data. Complete data processing and automatically draw test curve charts. Display the measured value, and at the same time, it can automatically judge whether the measured parameters are qualified or unqualified, automatically judge the symmetry of the curve and the correctness of the main indicators, etc., and can print a test report at the same time.

In summary, the hydraulic loader of the utility model for the torsional fatigue test bench of the new constant-velocity drive shaft includes a cylinder, a piston rod is arranged inside the cylinder, a moving piece and a static plate are arranged on the cylinder. There is a cylinder chamber between the cylinder and the piston rod; a front cylinder cover is provided on one side of the cylinder, a rear cylinder cover is provided on the other side, an oil distribution block and an electro-hydraulic Servo valve, the oil distribution block is located between the electro-hydraulic servo valve and the rear cylinder head, the lower end of the cylinder is provided with a drain pipe; the cylinder is provided with a sealing ring between the front cylinder head and the rear cylinder head An angle sensor is provided at one end of the piston rod, and a deep groove ball bearing is provided at the lower end of the piston rod. The loader of the present invention can be used for torque loading in a torsional fatigue test of a constant velocity drive shaft.

The above is only a specific embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any skilled person familiar with the technology in the art can easily think of changes within the technical scope disclosed in the utility model Or replacement, all should be covered within the scope of protection of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (5)

1., for the hydraulic pressure loading device of novel constant velocity driving shaft torsional fatigue test platform, its feature exists In, including cylinder barrel, in described cylinder barrel, it being provided with piston rod, described cylinder barrel is provided with moving plate and still, It is provided with cylinder chamber between described cylinder barrel and piston rod；Described cylinder barrel side is provided with front end housing, opposite side Being provided with back cylinder cover, described cylinder barrel upper end is provided with point oil clot and electrohydraulic servo valve, and described point of oil clot is positioned at Between described electrohydraulic servo valve and back cylinder cover, described cylinder barrel lower end is provided with drain mast；Described cylinder barrel with Being provided with sealing ring between front end housing, back cylinder cover, described piston rod one end is provided with angular transducer, Described piston-rod lower end is provided with deep groove ball bearing.

The most according to claim 1 for novel constant velocity driving shaft torsional fatigue test platform Hydraulic pressure loading device, it is characterised in that described cylinder barrel is provided with many group moving plates and organizes still more.

The most according to claim 2 for novel constant velocity driving shaft torsional fatigue test platform Hydraulic pressure loading device, it is characterised in that described cylinder barrel is provided with two groups of moving plates and two groups of stills, described Two groups of stills are oppositely arranged, and described two groups of moving plates are oppositely arranged.

4. according to arbitrary described the trying for novel constant velocity driving shaft torsional fatigue of claim 1-3 Test the hydraulic pressure loading device of platform, it is characterised in that described cylinder chamber connects a fuel tank, described cylinder chamber with Being provided with filter between fuel tank, the aperture of described filter is less than 6 μm.

The most according to claim 4 for novel constant velocity driving shaft torsional fatigue test platform Hydraulic pressure loading device, it is characterised in that described cylinder chamber is also associated with accumulator.