CN112781898A - Test bed for railway freight car parking brake cylinder and test method thereof - Google Patents
Test bed for railway freight car parking brake cylinder and test method thereof Download PDFInfo
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- CN112781898A CN112781898A CN202011599687.7A CN202011599687A CN112781898A CN 112781898 A CN112781898 A CN 112781898A CN 202011599687 A CN202011599687 A CN 202011599687A CN 112781898 A CN112781898 A CN 112781898A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/08—Railway vehicles
Abstract
The invention relates to the technical field of mechanical detection, aims to solve the problems that the requirements of a parking brake test, parking brake force detection and a manual release test cannot be met, the operation is not smooth, jamming is easy to occur and the detection is inaccurate in the prior art, and provides a test bed for a railway freight car parking brake cylinder, which comprises a bed frame; the rack is provided with a first vertical plate, a second vertical plate, a sliding column, an elastic piece and a sleeve; a movable mechanism is arranged on the sliding columns and is provided with a movable plate, a first through hole, a second through hole, a push rod, a sensor connecting rod and a joint bearing; the other end of the push rod is provided with a holding plate, a brake cylinder, a piston rod (not shown in the figure) and a piston; the outer side of the brake cylinder is provided with a manual release mechanism and a pull ring, and the outer side of the manual release mechanism is provided with a hand-slow test mechanism. The invention has the advantages of meeting the requirements of parking brake test, parking brake force detection and manual release test, along with smooth motion of the test bed, no clamping stagnation and more accurate detection.
Description
Technical Field
The invention relates to the technical field of mechanical detection, in particular to a test bed for a railway freight car parking brake cylinder and a test method thereof.
Background
The brake system of the railway freight car is generally configured with a set of brake cylinders and a set of hand brake, wherein the brake cylinders complete service braking or automatic braking, and the hand brake completes parking braking or manual braking. In order to realize the automation of parking brake, the brake parking cylinder of the railway freight car is produced at the same time, the test requirements of the brake parking cylinder are different from those of the original brake cylinder, except the performance test of the original brake cylinder, the test of parking brake force, the detection of parking brake force and the manual release test are required, the test bed in the prior art can not meet the requirements of the parking brake test, the detection of parking brake force and the manual release test, and the existing test bed has the defects of unsmooth operation, easy occurrence of jamming and low detection precision.
Disclosure of Invention
The invention aims to provide a test bed for a railway freight car parking brake cylinder and a test method thereof, and aims to solve the problems that the requirements of a parking brake test, parking brake force detection and manual release test cannot be met, the operation is not smooth, jamming is easy to occur and the detection is inaccurate in the prior art.
The embodiment of the invention is realized by the following steps:
the embodiment of the invention provides a test bed for a railway freight car parking brake cylinder, which comprises a rack; a first vertical plate and a second vertical plate are arranged on the rack, a plurality of sliding columns are arranged between the first vertical plate and the second vertical plate, one ends of the plurality of sliding columns are fixedly connected to the first vertical plate, and the other ends of the plurality of sliding columns are detachably connected to the second vertical plate;
a plurality of elastic pieces and a plurality of sleeves are respectively arranged at one end of the plurality of sliding columns, the plurality of elastic pieces are sleeved on one end of the plurality of sliding columns, the plurality of sleeves are fixedly connected to one side of the first vertical plate, and the plurality of elastic pieces are respectively positioned in the plurality of sleeves;
a movable mechanism is arranged on the plurality of sliding columns, the movable mechanism is provided with a movable plate, the movable plate is slidably connected onto the plurality of sliding columns, a first through hole is formed in the movable plate, a second through hole is formed in the second vertical plate, the first through hole and the second through hole are located on the same axis, a push rod is arranged in the second through hole, a sensor is arranged at one end of the push rod, one end of the push rod is connected with one end of the sensor, the other end of the sensor is connected with a sensor connecting rod, a joint bearing is arranged on the outer peripheral surface of the sensor connecting rod, the sensor connecting rod is arranged in the joint bearing in an interference fit mode, and the joint bearing is arranged in the first through hole in the interference fit mode;
a holding plate is arranged at the other end of the push rod and detachably connected to the rack, a brake cylinder is arranged on the holding plate, a piston rod (not shown) is arranged in the brake cylinder, a piston is arranged at one end of the piston rod, and the piston is connected to the other end of the push rod;
the outside surface of above-mentioned checking cylinder has the manual mechanism of alleviating, and above-mentioned manual mechanism of alleviating has the pull ring, and the outside that above-mentioned manual mechanism of alleviating is equipped with hand slow test mechanism, and above-mentioned hand slow test mechanism has the cylinder, and the one end of above-mentioned cylinder has the telescopic link, and the outer end detachable of above-mentioned telescopic link connects in above-mentioned pull ring.
So set up, can satisfy the experimental requirement of parking brake test, parking brake force detection, manual release, test bench motion smoothness, no jamming and detect more accurately.
Optionally: the movable plate is provided with a plurality of holes which are matched with the plurality of sliding columns, and the other ends of the plurality of sliding columns penetrate through the holes and are detachably connected to the plate surface of the second vertical plate; self-lubricating bearings are arranged in the holes, the self-lubricating bearings are sleeved on the sliding columns in a sliding mode, and the outer peripheral surfaces of the self-lubricating bearings are attached to the hole walls of the holes in an interference fit mode.
So set up, the wearing and tearing of above-mentioned sliding column and fly leaf are effectually reduced to the setting of above-mentioned self-lubricating bearing, make the motion smooth, do not have the jamming, so, the detection of parking brake force can be more accurate.
Optionally: the rack is provided with a table frame, one side of the table frame is provided with a plurality of supporting legs, the supporting legs are fixedly connected to one side of the table frame, the first vertical plate and the second vertical plate are perpendicularly connected to the other side of the table frame, and the cost is saved due to the arrangement mode.
Optionally: the outside of above-mentioned first riser is equipped with the backing plate, and above-mentioned backing plate fixed connection is equipped with a plurality of support piece on above-mentioned backing plate on the above-mentioned platform frame, and a plurality of above-mentioned support piece's a horizontal end fixed connection is in above-mentioned backing plate, and a plurality of above-mentioned support piece's a vertical end fixed connection is in the outside of above-mentioned first riser.
So set up, the effectual effect that plays the support to first riser of above-mentioned support piece for first riser is more firm.
Optionally: the other ends of the sliding columns are located on the outer side of the second vertical plate, nuts are arranged at the other ends of the sliding columns, the nuts are rotatably connected to the other ends of the sliding columns, and a gasket is arranged between the nuts and the second vertical plate.
So set up, the movable mechanism and the slip post of convenient to detach or change are favorable to the maintenance and the maintenance in later stage.
Optionally: the first through hole is located at the center of the movable plate, the outer circumferential surface of the joint bearing is attached to the hole wall of the first through hole, and the outer circumferential surface of the sensor link is attached to the inner circumferential surface of the joint bearing.
Therefore, the joint bearing is additionally arranged in the center of the movable plate, so that the influence of the center height error on the movement of the movable plate is reduced.
Optionally: one end of the sensor is detachably connected to one end of the push rod, and the other end of the sensor is detachably connected to one end of the sensor connecting rod.
So set up, be convenient for change sensor and push rod to be applicable to the test of various model brake cylinders.
Optionally: above-mentioned hand test mechanism of slowing down has the reinforcing plate, the vertical limit fixed connection of above-mentioned reinforcing plate in the lateral surface of above-mentioned frame, the horizontal edge of above-mentioned reinforcing plate is connected with the mounting panel, above-mentioned mounting panel is on a parallel with the top surface of above-mentioned frame, be equipped with a plurality of erection columns on the above-mentioned mounting panel, a plurality of above-mentioned erection columns are parallel to each other, and the one end fixed connection of a plurality of above-mentioned erection columns is in above-mentioned mounting panel, the other end of a plurality of above-mentioned erection columns is equipped with the holder of adaptation in above-mentioned cylinder, one side of above-mentioned holder is.
Optionally: the outer end of the telescopic rod is provided with a connecting hole, and the pull ring is detachably connected in the connecting hole.
In one implementation of this embodiment: the test method of the test bed for the railway freight car parking brake cylinder is also provided, and the performance test of the conventional brake cylinder comprises the following steps: the brake cylinder is charged first, the piston of the brake cylinder extends out to push the push rod to move forwards along with the piston, the push rod pushes the movable plate to move forwards, when the movable plate abuts against the elastic piece, the elastic piece begins to be compressed, when the brake cylinder is exhausted, the piston retracts, and the elastic piece pushes the movable mechanism back.
Parking brake test and parking brake force detection: when parking braking is carried out, although the brake cylinder is exhausted, the piston rod in the brake cylinder is locked, the piston cannot retract, at the moment, the movable mechanism stops moving, the sensor displays parking braking force values, and when parking braking is relieved, the elastic piece pushes the movable mechanism back.
Manual mitigation test: when the function is not required to be manually released, the telescopic rod of the air cylinder keeps in an extending state, when the function is required to be manually released, the air cylinder is inflated, the telescopic rod of the air cylinder is retracted, the telescopic rod pulls the pull ring, and the manual release of the brake cylinder is realized.
In summary, the test bed for the railway freight car parking brake cylinder and the test method thereof disclosed by the invention have the beneficial effects of capability of meeting the requirements of parking brake tests, parking brake force detection and manual release tests, smooth movement, no clamping stagnation and more accurate detection.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of a test bed for a railway freight car parking brake cylinder in an embodiment of the invention;
FIG. 2 is a side view of a test stand for a railway freight car parking brake cylinder in an embodiment of the present invention.
Icon: 1-a gantry; 2-a first vertical plate; 3-a second vertical plate; 4-a sliding column; 5-an elastic member; 6-a sleeve; 7-a moving mechanism; 8-a movable plate; 9-a first via; 10-a second via; 11-a push rod; 12-a sensor; 13-a sensor connection rod; 14-knuckle bearing; 15-holding plate; 16-a brake cylinder; 17-a piston; 18-a manual mitigation mechanism; 19-a pull ring; 20-hand slow test mechanism; 21-cylinder; 22-a telescopic rod; 23-holes; 24-self-lubricating bearings; 25-a frame; 26-support legs; 27-a backing plate; 28-a support; 29-a nut; 30-a gasket; 31-a reinforcing plate; 32-a mounting plate; 33-mounting posts; 34-a clamp; 35-connecting hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the terms are only used for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms "first," "second," and the like in the description of the present invention are only used for distinguishing between the descriptions and are not intended to indicate or imply relative importance.
Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present invention do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
Referring to fig. 1 and fig. 2, the present embodiment provides a test bed for a parking brake cylinder of a railway freight car, comprising a stand 1; a first vertical plate 2 and a second vertical plate 3 are arranged on the rack 1, a plurality of sliding columns 4 are arranged between the first vertical plate 2 and the second vertical plate 3, one ends of the plurality of sliding columns 4 are fixedly connected to the first vertical plate 2, and the other ends of the plurality of sliding columns 4 are detachably connected to the second vertical plate 3;
a plurality of elastic pieces 5 and a plurality of sleeves 6 are respectively arranged at one end of the plurality of sliding columns 4, the plurality of elastic pieces 5 are sleeved at one end of the plurality of sliding columns 4, the plurality of sleeves 6 are fixedly connected to one side of the first vertical plate 2, and the plurality of elastic pieces 5 are respectively positioned in the plurality of sleeves 6;
a movable mechanism 7 is arranged on the plurality of sliding columns 4, the movable mechanism 7 has a movable plate 8, the movable plate 8 is slidably connected to the plurality of sliding columns 4, a first through hole 9 is arranged on the movable plate 8, a second through hole 10 is arranged on the second vertical plate 3, the first through hole 9 and the second through hole 10 are all located on the same axis, a push rod 11 is arranged in the second through hole 10, a sensor 12 is arranged at one end of the push rod 11, one end of the push rod 11 is connected with one end of the sensor 12, the other end of the sensor 12 is connected with a sensor connecting rod 13, a joint bearing 14 is arranged on the outer peripheral surface of the sensor connecting rod 13, the sensor connecting rod 13 is arranged in the joint bearing 14 through interference fit, and the joint bearing 14 is arranged in the first through hole 9 through interference fit;
a holding plate 15 is provided at the other end of the push rod 11, the holding plate 15 is detachably connected to the platform 1, a brake cylinder 16 is provided on the holding plate 15, a piston rod (not shown) is provided in the brake cylinder 16, a piston 17 is provided at one end of the piston rod, and the piston 17 is connected to the other end of the push rod 11;
the brake cylinder 16 has a manual release mechanism 18 on an outer surface thereof, the manual release mechanism 18 has a pull ring 19, a manual release testing mechanism 20 is provided on an outer side of the manual release mechanism 18, the manual release testing mechanism 20 has a cylinder 21, an expansion link 22 is provided at one end of the cylinder 21, and an outer end of the expansion link 22 is detachably connected to the pull ring 19.
When the brake device is used, the brake cylinder 16 is arranged on the containing plate 15 on the rack 1, the brake cylinder 16 is inflated, so that a piston rod in the brake cylinder 16 extends, at the moment, a piston 17 at one end of the piston rod pushes a push rod 11 of the movable mechanism 7, the movable plate 8 is pushed by the push rod 11 to slide forwards on the sliding column 4 between the first vertical plate 2 and the second vertical plate 3, when the movable plate 8 abuts against the elastic part 5, the movable plate 8 compresses the elastic part 5, the movable mechanism 7 stops moving, the sensor 12 displays a parking brake force value, and when parking brake is relieved, the elastic part 5 pushes the movable mechanism 7 back.
The test bed for the railway freight car parking brake cylinder disclosed by the embodiment has the beneficial effects that the requirements of a parking brake test, parking brake force detection and a manual release test can be met, the test bed moves smoothly, no clamping stagnation exists, and the detection is more accurate.
Referring to fig. 1 and 2, the movable plate 8 has a plurality of holes 23 adapted to the plurality of sliding columns 4, and the other ends of the plurality of sliding columns 4 pass through the holes 23 and are detachably connected to the plate surface of the second vertical plate 3; self-lubricating bearings 24 are arranged in the holes 23, each self-lubricating bearing 24 is slidably sleeved on the sliding columns 4, and the outer peripheral surfaces of the self-lubricating bearings 24 are attached to the hole walls of the holes 23 in an interference fit mode.
With such an arrangement, the self-lubricating bearing 24 effectively reduces the wear of the sliding column 4 and the movable plate 8, so that the movement is smooth without any clamping stagnation, and the detection of the parking brake force is more accurate.
Above-mentioned rack 1 has a frame 23, and one side of above-mentioned frame 25 has a plurality of supporting legs 26, and a plurality of above-mentioned supporting legs 26 fixed connection is on one side of above-mentioned frame 25, and above-mentioned first riser 2 and second riser 3 all connect perpendicularly in the opposite side of above-mentioned frame 25, and the cost is convenient for practice thrift to the above-mentioned mode of setting.
A backing plate 27 is arranged on the outer side of the first vertical plate 2, the backing plate 27 is fixedly connected to the platform frame 25, a plurality of supporting pieces 28 are arranged on the backing plate 27, one horizontal ends of the plurality of supporting pieces 28 are fixedly connected to the backing plate 27, and one vertical end of the plurality of supporting pieces 28 is fixedly connected to the outer side of the first vertical plate 2.
So set up, the effectual effect that plays support to first riser 2 of above-mentioned support piece 28 for first riser 2 is more firm.
The other ends of the sliding columns 4 are located at the outer side of the second vertical plate 2, nuts 29 are arranged at the other ends of the sliding columns 4, the nuts 29 are rotatably connected to the other ends of the sliding columns 4, and a gasket 30 is arranged between the nuts 29 and the second vertical plate 3.
So set up, movable mechanism 7 and sliding column 4 are convenient for dismantle or change, are favorable to the maintenance and the maintenance in later stage.
The first through hole 9 is located at the center of the movable plate 8, the outer circumferential surface of the joint bearing 14 is fitted to the hole wall of the first through hole 9, and the outer circumferential surface of the sensor link 13 is fitted to the inner circumferential surface of the joint bearing 14.
In this way, the knuckle bearing 14 is installed at the center of the movable plate 8 to reduce the influence of the center height error on the movement of the movable plate.
One end of the sensor 12 is detachably coupled to one end of the push rod 11, and the other end of the sensor 12 is detachably coupled to one end of the sensor coupling rod 13.
The arrangement is convenient for replacing the sensor 12 and the push rod 11 so as to be suitable for testing various brake cylinders 16.
The sensor 12 is connected with the push rod 11 and the sensor connecting rod 13 by screw threads.
The hand relaxation test mechanism 20 has a reinforcing plate 31, a vertical side of the reinforcing plate 31 is fixedly connected to an outer side surface of the table frame 25, a mounting plate 32 is connected to a horizontal side of the reinforcing plate 31, the mounting plate 32 is parallel to a top surface of the table frame 25, a plurality of mounting posts 33 are arranged on the mounting plate 32, the mounting posts 33 are parallel to each other, one ends of the mounting posts 33 are fixedly connected to the mounting plate 32, the other ends of the mounting posts 33 are provided with clamping pieces 34 adapted to the air cylinders 21, one side of each clamping piece 34 is connected to the air cylinder 21, and the other side of each clamping piece 34 is connected to the other ends of the mounting posts 33.
The outer end of the telescopic rod 22 is provided with a connecting hole 35, and the pull ring 19 is detachably connected in the connecting hole 35.
Referring to fig. 1 and 2, in one embodiment of the present embodiment: the test method of the test bed for the railway freight car parking brake cylinder is also provided, and the performance test of the conventional brake cylinder comprises the following steps: when the brake cylinder 16 is charged first, the piston 17 of the brake cylinder 16 extends to push the push rod 11 to move forward, the push rod 11 pushes the movable plate 8 to move forward, the movable plate 8 abuts against the elastic member 5 to start compressing the elastic member 5, and when the brake cylinder 16 is exhausted, the piston 17 retracts and the elastic member 5 pushes the movable mechanism 7 back.
Parking brake test and parking brake force detection: when parking brake is applied, although the brake cylinder 16 is exhausted, the piston rod in the brake cylinder 16 is locked, the piston 17 cannot retract, the movable mechanism 7 stops moving, the sensor 12 displays the parking brake force value, and when parking brake is released, the movable mechanism 7 is pushed back by the elastic piece 5.
Manual mitigation test: when the manual release function is not needed, the expansion link 22 of the cylinder 21 is kept in an extended state, and when the manual release function is needed, the cylinder 21 is inflated to retract the expansion link 22 of the cylinder 21, and the expansion link 22 pulls the pull ring 19, so that the brake cylinder 16 is manually released.
In the embodiment, the installation of various railway truck parking brake cylinders 16 with the diameters of 6-12 inches can be met by replacing the containing plates 15 of the parking brake cylinders 16, and the stroke requirements of different types of parking brake cylinders 16 can be met by replacing the push rods 11, so that the test bed can be suitable for various railway truck parking brake cylinders 16.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a railway freight train parking test bench for brake cylinder which characterized in that:
comprises a rack;
a first vertical plate and a second vertical plate are arranged on the rack, a plurality of sliding columns are arranged between the first vertical plate and the second vertical plate, one ends of the plurality of sliding columns are fixedly connected to the first vertical plate, and the other ends of the plurality of sliding columns are detachably connected to the second vertical plate;
a plurality of elastic pieces and a plurality of sleeves are respectively arranged at one end of the sliding columns, the elastic pieces are sleeved at one end of the sliding columns in a sleeving manner, the sleeves are fixedly connected to one side of the first vertical plate, and the elastic pieces are respectively positioned in the sleeves;
the movable mechanisms are arranged on the sliding columns and provided with movable plates, the movable plates are slidably connected onto the sliding columns, first through holes are formed in the movable plates, second through holes are formed in the second vertical plates and are located on the same axis, push rods are arranged in the second through holes, sensors are arranged at one ends of the push rods, one ends of the push rods are connected with one ends of the sensors, the other ends of the sensors are connected with sensor connecting rods, joint bearings are arranged on the outer peripheral surfaces of the sensor connecting rods and are arranged in the joint bearings in an interference fit mode, and the joint bearings are arranged in the first through holes in the interference fit mode;
a containing plate is arranged at the other end of the push rod and detachably connected to the rack, a brake cylinder is arranged on the containing plate, a piston rod is arranged in the brake cylinder, a piston is arranged at one end of the piston rod, and the piston is connected to the other end of the push rod;
the lateral surface of checking cylinder has manual release mechanism, manual release mechanism has the pull ring, manual release mechanism's the outside is equipped with the slow test mechanism of hand, the slow test mechanism of hand has the cylinder, the one end of cylinder has the telescopic link, the outer end detachable of telescopic link connect in the pull ring.
2. The test bed for the parking brake cylinder of a railway freight car according to claim 1, characterized in that:
the movable plate is provided with a plurality of holes which are matched with the plurality of sliding columns, and the other ends of the plurality of sliding columns penetrate through the holes to be detachably connected to the plate surface of the second vertical plate;
and self-lubricating bearings are arranged in the holes, each self-lubricating bearing can be sleeved on the sliding columns in a sliding mode, and the peripheral surfaces of the self-lubricating bearings are attached to the hole walls of the holes in an interference fit mode.
3. The test bed for the parking brake cylinder of a railway freight car according to claim 1, characterized in that:
the rack is provided with a table frame, one side of the table frame is provided with a plurality of supporting legs, the supporting legs are fixedly connected to one side of the table frame, and the first vertical plate and the second vertical plate are vertically connected to the other side of the table frame.
4. The test bed for the parking brake cylinder of a railway freight car according to claim 1, characterized in that:
the outer side of the first vertical plate is provided with a base plate, the base plate is fixedly connected to the table frame, the base plate is provided with a plurality of supporting pieces, one horizontal ends of the plurality of supporting pieces are fixedly connected to the base plate, and one vertical ends of the plurality of supporting pieces are fixedly connected to the outer side of the first vertical plate.
5. The test bed for the parking brake cylinder of a railway freight car according to claim 1, characterized in that:
the other ends of the sliding columns are located on the outer side of the second vertical plate, nuts are arranged at the other ends of the sliding columns, the nuts are rotatably connected to the other ends of the sliding columns, and a gasket is arranged between the nuts and the second vertical plate.
6. The test bed for the parking brake cylinder of a railway freight car according to claim 1, characterized in that:
the first through hole is located in the center of the movable plate, the outer peripheral surface of the joint bearing is attached to the hole wall of the first through hole, and the outer peripheral surface of the sensor connecting rod is attached to the inner peripheral surface of the joint bearing.
7. The test bed for the parking brake cylinder of a railway freight car according to claim 1, characterized in that:
one end of the sensor is detachably connected to one end of the push rod, and the other end of the sensor is detachably connected to one end of the sensor connecting rod.
8. The test bed for the parking brake cylinder of a railway freight car according to claim 3, characterized in that:
the hand is slow test mechanism has the reinforcing plate, the vertical limit fixed connection of reinforcing plate in the lateral surface of platform frame, the horizontal edge of reinforcing plate is connected with the mounting panel, the mounting panel is on a parallel with the top surface of platform frame, be equipped with a plurality of erection columns on the mounting panel, it is a plurality of the erection column is parallel to each other, and a plurality of the one end fixed connection of erection column in the mounting panel, a plurality of the other end of erection column be equipped with the adaptation in the holder of cylinder, one side of holder connect in the cylinder, the another side of holder connect in a plurality of the other end of erection column.
9. The test bed for the parking brake cylinder of a railway freight car according to claim 1, characterized in that:
the outer end of the telescopic rod is provided with a connecting hole, and the pull ring is detachably connected in the connecting hole.
10. A method of testing a railway freight car parking brake cylinder test stand according to any one of claims 1 to 9, characterized in that:
testing the performance of a conventional brake cylinder: the brake cylinder is inflated firstly, a piston of the brake cylinder extends out to push the push rod to move forwards along with the piston, the push rod pushes the movable plate to move forwards, when the movable plate abuts against the elastic piece, the elastic piece begins to be compressed, when the brake cylinder exhausts, the piston retracts, and the elastic piece pushes the movable mechanism back.
Parking brake test and parking brake force detection: when parking braking is carried out, although the brake cylinder is exhausted, a piston rod in the brake cylinder is locked, the piston cannot retract, at the moment, the movable mechanism stops moving, the sensor displays the parking braking force value, and when parking braking is relieved, the spring force pushes the movable mechanism back.
Manual mitigation test: when the manual relieving function is not needed, the telescopic rod of the air cylinder keeps in an extending state, when the manual relieving function is needed, the air cylinder is inflated, the telescopic rod of the air cylinder is retracted, and the telescopic rod pulls the pull ring to achieve manual relieving of the brake cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011599687.7A CN112781898B (en) | 2020-12-29 | 2020-12-29 | Test bed for railway wagon parking brake cylinder and test method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011599687.7A CN112781898B (en) | 2020-12-29 | 2020-12-29 | Test bed for railway wagon parking brake cylinder and test method thereof |
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| CN112781898A true CN112781898A (en) | 2021-05-11 |
| CN112781898B CN112781898B (en) | 2023-08-18 |
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