CN206683807U - Low speed shaft brake efficiency test static brake force test device bottom slipway mechanism - Google Patents

Abstract

A kind of low speed shaft brake efficiency test static brake force test device bottom slipway mechanism, including door frame column, the top of the door frame column is portal frame entablature, is provided with bottom slipway mechanism positioned at the bottom of door frame column, its structure is：Including main table top, it is secondary table top on the outside of the main table top, platform is installed at the top of the main table top and secondary table top, interval is provided with track pad on the platform, and the top of the track pad is rail plate, and the outside of the rail plate and track pad is cased with protective cover, protective cover is installed on the rail plate, the protective cover covers the rail plate exposed, and one end of protective cover is fixed on slide unit, and protective cover is as the movement of slide unit is shunk or is extended.The utility model is compact-sized, reasonable, easy to operate, passes through the mating reaction of oil cylinder at the top of portal frame and bottom slide unit, in that context it may be convenient to completes the test job of static brake power, integrated operation is easy, and functional reliability is good, and operating efficiency is high.

Description

Low-speed axle brake energy efficiency test Static braking force test device Bottom slide mechanism

technical field

The utility model relates to the technical field of hoisting machinery, in particular to a bottom slide mechanism of a static braking force test device for low-speed shaft brake energy efficiency test.

Background technique

The low-speed shaft brake refers to the brake arranged after the transmission system reducer, which is relative to the high-speed shaft brake. Due to the reduced speed and increased torque through deceleration, the rotational speed of the transmission system is low, while the torque of the transmission system is very large. Therefore, the braking initial speed of the low-speed shaft brake is low, the initial speed is close to zero during normal braking, and it is only a few tenths of the speed of the high-speed shaft during emergency braking, or less; the braking force of the low-speed shaft brake is relatively large. Generally more than 63000N, high structural strength, large volume and self-weight, the most common use as a safety brake, directly brake the drum flange.

Since the initial braking speed of the low-speed shaft brake is low, and some are even close to zero, the static braking force of the low-speed shaft brake is mainly assessed; in addition, due to the large braking force and braking power of the low-speed shaft brake, if the dynamic inertia test is carried out, the test is relatively Danger, high degree of damage to the test device, and a large test workload; moreover, the national standard GB/T30221 "Industrial Brake Energy Efficiency Test Method" also clearly stipulates that the static braking force can be measured during the energy efficiency test of the brake with a braking force greater than 63000N. Braking force is not required. Therefore, this patent researches a kind of device that is suitable for testing the static braking force of low-speed axle brake specially.

Low-speed shaft brakes mainly include hydraulic caliper disc brakes, electromagnetic caliper disc brakes, etc.

The testing device in the prior art is used to test the braking torque of the high-speed shaft brake, and the static braking torque tested is relatively small, generally not greater than 30000Nm. Low-speed shaft brakes with low braking force can also be tested on such a device, but the braking torque of low-speed shaft brakes generally exceeds its test range, so the static braking force of low-speed shaft brakes cannot generally be tested. This device also has the following disadvantages:

(1) Brake discs are not suitable for all brakes. The width of the brake jaw of the brake is large or small, and the thickness of the brake disc is required to be consistent with the width of the brake jaw; the diameter of the brake disc must be consistent with the structure and center height of the brake. So different brakes require different discs.

(2) The test braking force is not strong. Limited by the structure and leverage ratio, generally the test capability of this device is not large, and the test range of the static braking torque is below 30000Nm.

(3) It takes up a lot of space. The device requires a lot of space due to the large diameter of the brake disc and the long lever, combined with the space required for hydraulic lever and brake installation.

(4) The structure is complex. The device has a complex structure, many parts, high transmission requirements, and high processing precision requirements.

(5) The brake installation is inconvenient. Because the brake is based on the theoretical friction radius and the center line of the brake jaw passes through the center of the brake disc, the installation of the brake is very complicated. In most cases, tooling needs to be designed separately, which is time-consuming, laborious and expensive.

(6) The precision is not high. Due to high installation requirements, friction radius, and inaccurate centerline of the jaws, it is easy to cause low test accuracy.

(7) The test stroke is short. If the linear motion of the hydraulic cylinder is transformed into the rotational motion of the brake disc, the stroke of the hydraulic cylinder itself is short, and when it is transformed into the rotational motion of the brake disc, the arc it turns is also short, which is not conducive to averaging.

(8) The cost is high. The structure is complex, the volume is large, and high precision is required. The hydraulic push rod, lever support, brake disc support, and brake installation base all need to reinforce the foundation, so the cost is high.

(9) Brake discs of multiple specifications are required.

(10) It is inconvenient to change the brake disc. The low-speed shaft brake has a large braking force, a large brake disc, and a large weight, so it is very inconvenient to disassemble the brake disc.

(11) The comprehensive error is large. The test is the braking torque, which needs to be converted into braking force after the theoretical friction diameter and leverage ratio. After many calculations, the comprehensive error is large.

Utility model content

Aiming at the shortcomings in the above-mentioned existing production technology, the applicant provides a bottom sliding platform mechanism and testing method of the static braking force test device for energy efficiency testing of low-speed shaft brakes, so that the static braking force of low-speed shaft brakes in the energy efficiency test of industrial brakes can be conveniently solved Test questions, greatly improving the reliability of the work, improve work efficiency.

The technical scheme adopted in the utility model is as follows:

A bottom sliding table mechanism of a static braking force test device for energy efficiency testing of low-speed shaft brakes, including a mast column. It includes a main platform, the outside of the main platform is a secondary platform, a platform is installed on the top of the main platform and the secondary platform, track backing plates are installed at intervals on the platform, and the upper part of the track backing plate is a sliding guide rail, The outside of the sliding guide rail and the track backing plate is covered with a protective cover, and a protective cover is installed on the sliding guide rail. The protective cover covers the exposed sliding guide rail, and one end of the protective cover is fixed on the slide table. Shrink or extend with the movement of the slide table.

As a further improvement of the above technical solution:

The surface of the slide table is provided with T-shaped anchor bolts.

An oil cylinder support is arranged at the rear of the slide table, an oil cylinder is installed on the oil cylinder support, and its output end is connected with the slide table through a push-pull rod.

One side of the slide table is also extended with a stroke bumper, and a stroke limit base is installed on the outside of one side of the slide table, and a stroke limit switch and a stroke limit roller are respectively installed at both ends of the stroke limit base.

The beneficial effects of the utility model are as follows:

The utility model has a compact and reasonable structure and is easy to operate. Through the cooperation of the oil cylinder on the top of the gantry frame and the slide table at the bottom, the test of the static braking force can be easily completed. The installation of the brake can be easily completed through the hoisting device on the top of the beam on the gantry frame. And disassembly, the overall operation is simple, the work reliability is good, and the work efficiency is high.

The utility model mainly solves the problem of the static braking force test of the low-speed shaft brake in the energy efficiency test of the industrial brake.

The braking force of the utility model braking force test is large, generally up to 1,000,000N, or even larger, which is dozens of times of the test capacity introduced in the technical background; the device does not need a special foundation; the hydraulic cylinder and the brake are installed in the vertical direction, occupying The floor area is small; the tested brake is large in size, and the large-sized brake is also easy to install; the comprehensive measurement error is small, the braking force can be directly tested, and the pressure sensor can directly measure the braking force; it is convenient to adapt to different brake tests. For different brakes, only need Just replace the appropriate friction plate; the structure is simple, mainly composed of a hydraulic cylinder, a pressure sensor and a door frame; the brake is easy to install, and the brake base can move back and forth for easy installation and disassembly. Since it is only pressure, the brake base does not need to be strictly fixed, only The pad needs to be adjusted to make the jaws vertical; the test accuracy is high, the pressure sensor directly tests the pressure, and the test progress directly depends on the sensor accuracy; the test stroke is long, the friction plate runs up and down in a straight line, the test stroke is long, and the average value is more accurate; the cost Low cost, simple structure, small volume, low processing precision required, so the cost is low; it is not allowed to replace the expensive brake disc, just replace the small friction plate; the friction plate is easy to replace, because the friction plate is only under pressure, Therefore, no special fixing is required. Considering the unloading of pressure, the friction plate rises, so it is only necessary to connect the friction plate with a pin shaft to carry the self-weight of the friction plate.

In addition to the above advantages, the utility model also has the following advantages: safe and reliable, with multiple safety protection devices, telescopic oil cylinder piston rod has up and down limit limit, brake base has front and rear limit limit, emergency stop switch on electrical, testing software There is also a stop button; it can be moved as a whole, the device has an integrated structure and can be moved as a whole; it has multiple functions, in addition to testing the static braking force of the brake, it can also be used as a pressure and tension test for structural parts, slings and other components; Easy maintenance, due to the simple structure, there is almost no need for maintenance; the sensor is convenient for measurement, the sensor is screwed on the piston rod of the hydraulic lever, and it only needs to be unscrewed when measuring, and there is no need to disassemble the system; it is equipped with a lifting mechanism, which can be convenient The installation of the brake can also facilitate the installation, disassembly and later maintenance of the test bench itself.

Description of drawings

Fig. 1 is the application drawing of the present utility model.

Fig. 2 is a side view of the sliding platform part at the bottom of the utility model.

Fig. 3 is a top view of the sliding platform part at the bottom of the utility model.

Among them: 1. Hoisting device; 2. Downward oil cylinder; 3. Guide rod; 4. Buzzer; 5. Gantry upper beam; 6. Upward oil cylinder; 7. Horizontal connecting plate; platform; 10, sliding guide rail; 11, track backing plate; 12, main table; 13, auxiliary table; 14, threading pipe; 15, lower limit collision head; 16, proximity switch; 17, displacement sensor; 18, upper limit collision 19, displacement guide rod; 20, oil cylinder seal; 21, displacement connecting plate; 22, pressure piston rod; 23, pressure sensor; 24, pressure head; 25, friction plate connecting hole; 26, friction plate; 27, pressure Combined oil cylinder body; 28. Oil cylinder bracket; 29. Push-pull rod; 30. T-shaped anchor bolt groove; 31. Forward slide cylinder; 32. Combined oil cylinder body; 33. Return cylinder; 34. Travel limit base; 35. Stroke Bumping head; 36, travel limit roller; 37, travel limit switch; 38, protective cover.

detailed description

Below in conjunction with accompanying drawing, illustrate the specific embodiment of the present utility model.

As shown in Fig. 1, Fig. 2 and Fig. 3, the bottom sliding platform mechanism of the static braking force test device for low-speed shaft brake energy efficiency test in this embodiment includes a mast column 8, and the top of the mast column 8 is the gantry upper beam 5, A bottom sliding table mechanism is installed at the bottom of the gantry column 8, and its structure is: a main table 12, an auxiliary table 13 on the outside of the main table 12, a platform is installed on the top of the main table 12 and the auxiliary table 13, and the platform is installed at intervals. Track backing plate 11, the top of track backing plate 11 is sliding guide rail 10, and the outside of sliding guide rail 10 and track backing plate 11 is covered with protective cover 38, and protective cover 38 is installed on sliding guide rail 10, and protective cover 38 will expose the sliding guide rail 10 covers, and one end of protective cover 38 is fixed on the slide table 9, and protective cover 38 shrinks or stretches along with the movement of slide table 9.

The surface of the slide table 9 is provided with T-shaped anchor bolt grooves 30 .

The rear of slide table 9 is provided with oil cylinder support 28, and oil cylinder is installed on the oil cylinder support 28, and its output end is connected with slide table 9 by push-pull rod 29.

One side of slide table 9 is also extended with stroke bumper 35, is positioned at the outside of slide table 9 side and is equipped with travel limit base 34, and the two ends of travel limit base 34 are respectively equipped with travel limit switch 37 and stroke limit switch. Roller 36.

As shown in Figure 1, the bottom slide mechanism of the low-speed shaft brake energy efficiency test static braking force test device of the present embodiment includes a mast column 8, and the top of the mast column 8 is the upper beam 5 of the gantry, and the upper beam 5 of the gantry Install the downward oil cylinder 2 on the top, and install the upward oil cylinder 6 in the middle. The upward oil cylinder 6 and the downward oil cylinder 2 form a combined oil cylinder; the horizontal connecting plate 7 is installed on the upper beam 5 of the gantry frame through the guide rod 3, and the horizontal connecting plate 7 is located on the upper beam 5 of the gantry frame. Directly below, the bottom of the combined oil cylinder is equipped with a pressure piston rod 22, a pressure sensor 23 and a pressure head 24, and the bottom of the pressure head 24 is installed with a friction plate 26 through a friction plate connecting hole 25; , a bottom slide mechanism is installed at the bottom of the mast column 8 .

One end of the horizontal connecting plate 7 is connected with the guide rod 3, the other end is equipped with a displacement connecting plate 21, the end of the displacement connecting plate 21 is connected with the displacement guide rod 19, and the upper limit bumper 18 is arranged on the displacement guide rod 19; Threading pipe 14 is installed in 5, and displacement guide rod 19 stretches in the threading pipe 14, and lower limit bumper 15 is installed above it, and threading pipe 14 is also equipped with proximity switch 16 and displacement sensor 17.

In the specific operation process, the following test methods are used to complete:

The first step: start the hydraulic station;

The second step: the oil cylinder at the rear of the slide table 9 works, so that the push-pull rod 29 is stretched out, and the slide table 9 is pushed out of the gantry;

The third step: start the hoisting device 1 to hoist the brake to a suitable position on the slide table 9;

Step 4: Fix the brake on the slide table 9 through anchor bolts and T-shaped anchor bolt grooves 30;

Step 5: After the installation is completed, start the oil cylinder at the rear of the sliding table 9 again, and pull the sliding table 9 back to the bottom of the upper beam 5 of the gantry frame;

Step 6: Open the brake jaw and put the friction plate 26 into the brake jaw;

Step 7: Close the brake jaw;

Step 8: Load the downward oil cylinder 2, so that the pressure piston rod 22 moves downward, so that the friction plate 26 moves downward, so that the friction plate 26 and the brake jaw move relative to each other, and the pressure is measured by the pressure sensor 23. The analog signal is sent to the signal processing and display system;

Step 8: After the test, open the brake caliper;

Step 9: Apply hydraulic oil to the upward cylinder 6 to load, and the pressure piston rod 22 moves upward, so that the friction plate 26 is separated from the brake jaw;

Step 10: Repeat the second step, the oil cylinder at the rear of the sliding table 9 works, so that the push-pull rod 29 is stretched out, and the sliding table 9 is pushed out of the gantry;

Step 11: Unscrew the fixing bolts of the brake base, and separate the brake from the slide table 9;

Step 12: Start the hoisting device 1 to hoist the brake away from the slide table 9;

The thirteenth step: the travel limit of the slide table 9 forward and return is completed by the travel bumper 35, the travel limit roller 36 and the travel limit switch 37;

Step 14: The upper and lower operating limits of the friction plate 26 are completed through the displacement guide rod 19, the upper limit bumper 18, the lower limit bumper 15, the proximity switch 16 and the displacement sensor 17.

The working principle of this utility model: during the test, first start the hydraulic station, advance the oil supply of the sliding oil cylinder 31, make the push-pull rod 29 stretch out, push the brake installation slide 9 out of the gantry frame, start the hoisting device 1 to lift the brake to the brake installation slide At a suitable position on the platform 9, the brake is fixed on the sliding platform 9 through the anchor bolts and the T-shaped anchor bolt groove 30 of the sliding platform 9. After the installation is completed, the return cylinder 33 is loaded, and the brake installation sliding platform 9 is pulled back to the gantry directly below the shelf. Install slide table 9 to advance and the stroke limit of backhaul is finished by stroke bumper 35, stroke limit roller 36 and limit switch 37. When moving forward, the limit position bumps the head against the forward limit roller, touches the forward limit switch, and the movement stops. When returning, the limit position bumps the head against the return limit roller, touches the forward limit switch, and the movement stops, which acts as a limit. Prevent the brake mounting slide 9 from slipping out of the sliding guide rail 10 . The protective cover 38 is used to cover the sliding guide rail 10, so as to prevent the exposed guide rail from injuring the installer, and also prevent the installer from being crushed and injured when the brake installation platform and the guide rail move relative to each other.

After the brake is installed in place. Select a friction plate 26 with a suitable thickness according to the width of the brake jaw, and use a pin to connect the friction plate 26 to the pressure head 24 through the friction plate connection hole 25 .

The slow downward pressure piston rod 22 loads, promotes the friction plate 26 to go down, opens the brake jaw, puts the friction plate 26 into the jaw, closes the brake jaw, and makes the brake jaw clamp the friction plate 26.

Continue to press the piston rod 22 downward, and the running stroke is realized according to the displacement guide rod 19 and the displacement sensor 17, or the proximity switch 16 senses the lower limit bumper 15, and the test stops. The brake jaw is opened through the hydraulic system, the piston rod of the loading cylinder goes up and the cylinder 6 is fed with pressure oil, so that the piston rod rises, and the friction plate 26 pulls out the brake caliper until it reaches the program setting value and is detected by the stroke limit switch, or close to The switch 16 senses the upper limit bumper 18, and the return stroke of the piston rod ends.

During the test, the test buzzer 4 flickers, indicating that the test is in progress, pay attention to safety.

After the test finishes, by supplying oil to the forward sliding oil cylinder 31, the push-pull rod 29 is stretched out, and the brake installation slide table 9 is pushed out of the gantry. The brake can be disassembled, the hoisting device 1 can be started to lift the brake from the test platform, and another brake can be installed to prepare for the next test. You can also make installation adjustments and repeat the test.

The above description is an explanation of the utility model, not a limitation of the utility model. For the scope limited by the utility model, please refer to the claims. Within the protection scope of the utility model, any form of modification can be made.

Claims (4)

1. A low-speed shaft brake energy efficiency test static braking force test device bottom sliding platform mechanism, characterized in that: it includes a gantry column (8), the top of the gantry column (8) is a gantry upper beam (5), A bottom slide mechanism is installed at the bottom of the gantry column (8), and its structure is as follows: a main table (12), an auxiliary table (13) outside the main table (12), the main table (12) and The top of the auxiliary platform (13) is equipped with a platform, and the track backing plate (11) is installed at intervals on the platform, and the top of the track backing plate (11) is a sliding guide rail (10), and the sliding guide rail (10) and A protective cover (38) is sheathed on the outside of the track backing plate (11), and a protective cover (38) is installed on the sliding guide rail (10), and the protective cover (38) covers the exposed sliding guide rail (10), One end of the protective cover (38) is fixed on the slide table (9), and the protective cover (38) shrinks or stretches along with the movement of the slide table (9). 2. The sliding table mechanism at the bottom of the static braking force testing device for low-speed axle brake energy efficiency testing according to claim 1, characterized in that: T-shaped anchor bolts (30) are arranged on the surface of the sliding table (9). 3. The sliding table mechanism at the bottom of the static braking force testing device for low-speed axle brake energy efficiency testing as claimed in claim 1, characterized in that: the rear of the sliding table (9) is provided with an oil cylinder support (28), and the oil cylinder support ( 28) oil cylinder is installed on the top, and its output end is connected with slide table (9) by push-pull rod (29). 4. The sliding table mechanism at the bottom of the static braking force testing device for energy efficiency testing of low-speed shaft brakes according to claim 1, characterized in that: one side of the sliding table (9) is also extended with a stroke bumper (35), which is located at the bottom of the sliding table (9). The outside of platform (9) one side is equipped with travel limit base (34), and the two ends of described travel limit base (34) are respectively equipped with travel limit switch (37) and travel limit roller (36).