CN111665029A

CN111665029A - Large-load high-frequency hydraulic dynamic test bed

Info

Publication number: CN111665029A
Application number: CN202010493359.2A
Authority: CN
Inventors: 孙剑; 朱庆来; 曹黎俊
Original assignee: Jiangsu Xuanrui Vibration Damping Equipment Co ltd
Current assignee: Jiangsu Xuanrui Vibration Damping Equipment Co ltd
Priority date: 2020-06-03
Filing date: 2020-06-03
Publication date: 2020-09-15

Abstract

The invention relates to the technical field of hydraulic test beds, in particular to a large-load high-frequency hydraulic dynamic test bed.

Description

Large-load high-frequency hydraulic dynamic test bed

Technical Field

Background

The evaporator and the main pump of key equipment for energy output in a reactor of a pressurized water reactor nuclear power plant generate spatial position changes such as expansion and contraction due to temperature changes of a coolant system, the hydraulic damper for supporting the two main equipment in the horizontal direction has small damping on the spatial position changes, once a pipe break or a strong earthquake occurs, a locking valve of the damper is closed rapidly, oil flow between a front cavity and a rear cavity of a piston in a damping hydraulic cylinder is stopped, so that the hydraulic damper becomes a hydraulic spring instantly, the impact force of the pipe break or the earthquake is buffered by the rigidity of a cylinder body and the elasticity of the damper, and the steam generator and the main pump are protected safely.

Through strict theoretical calculation and model tests, the accident load which the hydraulic damper should bear under the accident working condition is determined, whether the hydraulic damper which is designed and manufactured according to the theories of machinery, hydraulic pressure and the like can really bear the responsibility of shock resistance and shock resistance is determined, and the hydraulic damper needs to be tested, so that a test bed which can meet the index requirement is needed.

The invention provides a hydraulic dynamic test bed, which is characterized in that a vibration oil cylinder is arranged to provide vibration force with specified frequency, the offset displacement of a piston rod of a hydraulic damper is measured, whether the hydraulic damper can protect main equipment is judged, and the vibration oil cylinder adopts a double-rod hydraulic cylinder structure with piston rods at two ends having the same diameter, so that the tensile load and the pressure load in the test process can be conveniently adjusted to be equal, the measurement accuracy is high, the practicability is high, and the hydraulic dynamic test bed is worthy of popularization.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to solve the problems of low measurement accuracy, low practicability and inconvenient popularization of the conventional dynamic test bed, the invention provides a large-load high-frequency hydraulic dynamic test bed which comprises a dynamic test bed, a damper, a rotating part and a sensor assembly, is convenient for adjusting the equal tensile load and the equal compressive load in the test process, has high measurement accuracy and strong practicability, is worthy of popularization, and effectively solves the problems.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a high-load high-frequency hydraulic dynamic test stand comprises

A dynamic test bed is arranged on the base,

the damper comprises a damper body and a front connecting piece arranged on the damper body,

one side of the damper body is rotationally connected with the rotating piece through the rear connecting piece, the other side of the damper body is fixedly connected with the front connecting piece,

the sensor assembly is a sensor for measuring force and recording displacement, and comprises a force measuring sensor and a displacement sensor.

Further, the dynamic test bed comprises a rear wall plate, a front wall plate and a long stay bar.

Furthermore, the rotating piece is a U-shaped seat, the front connecting piece is a front pin head, and the rear connecting piece is a rear pin shaft.

Furthermore, the front pin head is rotatably connected with a fork-shaped connecting piece through a front pin shaft, the fork-shaped connecting piece is connected with the length adjusting head, the force measuring sensor is positioned in the middle of the fork-shaped connecting piece and the length adjusting head, and the displacement sensor is positioned at the front pin head; the damper body is arranged on the dynamic test bed through the U-shaped seat and the length adjusting head,

furthermore, the outer side end of the front wall plate is fixedly provided with a vibration applying oil cylinder through a second screw and a third nut.

Further, the both ends of long stay bar all are provided with flange and screw thread, long stay bar runs through the setting and is in the back wallboard with the circular through-hole of four angles departments of preceding wallboard is fixed through the first nut that is equipped with.

Furthermore, the side end, far away from the damper body, of the U-shaped seat is fixed to the inner side end of the rear wallboard through a first screw and a second nut, and the length adjusting head is fixedly connected with the inner side end of the front wallboard.

Furthermore, the vibration applying oil cylinder adopts a double-rod hydraulic cylinder structure with piston rods at two ends equal in diameter

Furthermore, a sliding base plate with low friction resistance is arranged at the supporting bottom of the rear wallboard.

Furthermore, the back wallboard and the front wallboard are vertically placed, and the long stay bars are four stay bars horizontally arranged.

The invention has the beneficial effects that: the invention provides a large-load high-frequency hydraulic dynamic test bed which comprises a dynamic test bed, a damper, a rotating part and a sensor assembly, wherein the tensile load and the compressive load are equal in the test process and are convenient to adjust; the shock-applying oil cylinder adopts a double-rod hydraulic cylinder structure with piston rods at two ends of the cylinder having the same diameter, so that the equal tensile load and the equal compressive load in the test process can be conveniently adjusted; the support bottom of the rear wallboard is provided with a sliding base plate with low friction resistance, so that the influence of temperature change and tension and compression load on structural deformation can be effectively reduced.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural diagram of the present invention.

In the figure: 1. the damper comprises a damper body, 2, a U-shaped seat, 3, a long stay bar, 4, a rear pin shaft, 5, a flange, 6, threads, 7, a rear wall surface, 8, a first nut, 9, a first screw rod, 10, a second nut, 11, a sliding base plate, 12, a front pin shaft, 13, a fork-shaped connecting piece, 14, a force measuring sensor, 15, a length adjusting head, 16, a front wall plate, 17, a second screw rod, 18, a third nut, 19, a vibration applying oil cylinder and 20, a front pin head.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

A high-load high-frequency hydraulic dynamic test stand comprises

A dynamic test bed is arranged on the base,

the damper comprises a damper body and a front connecting piece arranged on the damper body 1,

one side of the damper body 1 is rotationally connected with the rotating piece through a rear connecting piece, the other side of the damper body 1 is fixedly connected with a front connecting piece,

sensor assemblies, sensors for measuring force and recording displacement, include a load cell 14 and a displacement sensor.

The dynamic test bed comprises a rear wall plate 7, a front wall plate 16 and a long stay bar 3, a rotating piece is a U-shaped seat 2, a front connecting piece is a front pin head 20, a rear connecting piece is a rear pin shaft 4, the front pin head 20 is rotatably connected with a fork-shaped connecting piece 13 through the front pin shaft 4, the fork-shaped connecting piece 13 is connected with a length adjusting head 15, a force measuring sensor 14 is positioned in the middle position of the fork-shaped connecting piece 13 and the length adjusting head 15, and a displacement sensor is positioned at the front pin head 20; damper body 1 is installed on the dynamic test platform through U type seat 2 and length adjustment head 15, there is the hydro-cylinder 19 of executing a shake through second screw rod 17 and the third nut 18 fixed mounting that are equipped with at the outside end of preceding wallboard 16, the both ends of long stay bar 3 all are provided with flange 5 and screw thread 6, long stay bar 3 runs through the circular through-hole that sets up in four angles departments of back wallboard 7 and preceding wallboard 16 and fixes through the first nut 8 that is equipped with, the side that damper body 1 was kept away from to U type seat 2 is fixed at the medial extremity of back wallboard 7 through the first screw rod 9 and the second nut 10 that are equipped with, length adjustment head 15 and the medial extremity fixed connection of preceding wallboard 16.

In a specific embodiment, the vibration applying cylinder 19 is a double-rod hydraulic cylinder structure with piston rods at two ends of the same diameter, the bottom of the support of the rear wall plate 7 is provided with a sliding base plate 11 with low friction resistance, the rear wall plate 7 and the front wall plate 16 are vertically arranged, and the long stay rods 3 are four stay rods horizontally arranged.

In the embodiment of the invention, the large-load high-frequency hydraulic dynamic test bed comprises a damper body 1, a vibration applying oil cylinder 19 and a dynamic test bed; one side of the damper body 1 is rotatably connected with the U-shaped seat 2 through a rear pin shaft 4, the other side of the damper body 1 is fixedly connected with a front pin head 20, the front pin head 20 is rotatably connected with a fork-shaped connecting piece 13 through a front pin shaft 12, the fork-shaped connecting piece 13 is connected with a length adjusting head 15, a force measuring sensor 14 is arranged in the middle position between the fork-shaped connecting piece 13 and the length adjusting head 15, a displacement sensor is arranged on the front pin head 20, and the arranged force measuring sensor 14 and the displacement sensor are used for recording the changes of load and displacement in the vibration process under the synergistic effect, so that a curve graph of the load and the displacement is drawn.

The damper body 1 is installed on a dynamic test bed through a U-shaped seat 2 and a length adjusting head 15, the dynamic test bed comprises a rear wall plate 7, a front wall plate 16 and four horizontally arranged long stay rods 3, flanges 5 and threads 6 are arranged at two ends of each long stay rod 3, the long stay rods 3 penetrate through circular through holes arranged at four corners of the rear wall plate 7 and the front wall plate 16 and are fixed through first nuts 8, the long stay rods 3 are pulled through the arranged threads 6 and the first nuts 8, the flanges 5 transmit pressure loads to the long stay rods 3, the side end, far away from the damper body 1, of the U-shaped seat 2 is fixed at the inner side end of the rear wall plate 7 through first screw rods 9 and second nuts 10, the length adjusting head 15 is fixedly connected with the inner side end of the front wall plate 16, a vibration applying oil cylinder 19 is fixedly installed at the outer side end of the front wall plate 16 through a second screw rod 17 and a third nut 18, the vibration applying load of the vibration applying oil cylinder 19 drives a front damping pin head 20 connected with a piston in the hydraulic damper 1 to vibrate, the vibration application oil cylinder 19 adopts a double-rod hydraulic cylinder structure with piston rods at two ends of the same diameter, so that the tensile load and the compressive load are equal in the test process, and the sliding base plate 11 with low friction resistance is arranged at the supporting bottom of the rear wall plate 7, so that the influence of temperature change and the tensile and compressive loads on structural deformation can be effectively reduced.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a heavy load high frequency hydraulic pressure dynamic test platform which characterized in that: comprises that

A dynamic test bed is arranged on the base,

2. A heavy-load high-frequency hydraulic dynamic test rig as claimed in claim 1, wherein: the dynamic test bed comprises a rear wall plate, a front wall plate and a long stay bar.

3. A heavy-load high-frequency hydraulic dynamic test rig as claimed in claim 2, wherein: the rotating piece is a U-shaped seat, the front connecting piece is a front pin head, and the rear connecting piece is a rear pin shaft.

4. A heavy-load high-frequency hydraulic dynamic test rig as claimed in claim 3, wherein: the front pin head is rotatably connected with a fork-shaped connecting piece through a front pin shaft, the fork-shaped connecting piece is connected with the length adjusting head, the force measuring sensor is positioned in the middle of the fork-shaped connecting piece and the length adjusting head, and the displacement sensor is positioned at the front pin head; the damper body is installed on the dynamic test bed through the U-shaped seat and the length adjusting head.

5. A heavy-load high-frequency hydraulic dynamic test bench as defined in claim 4, wherein: and the outer side end of the front wallboard is fixedly provided with a vibration oil cylinder through a second screw and a third nut.

6. A heavy-load high-frequency hydraulic dynamic test bench as claimed in claim 5, wherein: the both ends of long stay bar all are provided with flange and screw thread, long stay bar runs through the setting and is in the back wallboard with the circular through-hole of four angles departments of preceding wallboard is fixed through the first nut that is equipped with.

7. A heavy-load high-frequency hydraulic dynamic test rig as claimed in claim 6, wherein: the side end of the U-shaped seat far away from the damper body is fixed to the inner side end of the rear wallboard through a first screw and a second nut, and the length adjusting head is fixedly connected with the inner side end of the front wallboard.

8. A heavy-load high-frequency hydraulic dynamic test rig as claimed in claim 7, wherein: the vibration applying oil cylinder is of a double-rod hydraulic cylinder structure with piston rods at two ends being equal in diameter.

9. A heavy-load high-frequency hydraulic dynamic test rig as claimed in claim 8, wherein: and a sliding base plate with low friction resistance is arranged at the supporting bottom of the rear wallboard.

10. A high load high frequency hydraulic dynamic test bed as claimed in claim 9, wherein said back wall panel and said front wall panel are vertically disposed and said long tension braces are four horizontally disposed braces.