37 mm
high-angle/anti-aircraft gun
(
Hereinafter referred to as Sanqi anti-aircraft gun.
)
It is still the main equipment for weather modification operations and services in China. these
Most anti-aircraft guns are retired from the army because they have a long service life, lack spare parts for maintenance, and are always used in bad weather.
Used under the work,
There are often some failures.
Here,
According to the weather modification operation and the maintenance of Sanqi anti-aircraft gun in Yicheng for many years,
This paper summarizes the common faults in the use of Sanqi anti-aircraft gun, analyzes the causes of the faults, and puts forward the corresponding treatment methods.
First, the shooting automatic machine (gun body, bolt, loader) failure and handling methods.
1
The automatic machine will not re-enter the original position during shooting.
It is a phenomenon that the automatic machine does not re-position in the continuous shooting of the Sanqi anti-aircraft gun.
：
Slow reentry and slow firing rate; In severe cases, the raised part of the bomb conveyor belt cannot
Press the lever of the lock of the card, and you can't play it repeatedly. Cause: The reed on the connecting shaft failed, and the plug tightener was screwed too tightly, and re-entered the parking ring of the machine and the slideway in the bracket.
Excessive sludge or abrasion; deal with
:( 1)
Turn the gun body into the shooting range, remove the automatic latch cover, and then turn the firing angle to an angle convenient for operation.
(
Warning prohibition
Shooting angle
)
(2)
From the automatic latch cover, insert a large screwdriver between the lower part of the ammunition conveying body and the front end of the automatic firing latch rod, and pry it upward with a little force.
Control the automatic firing bolt to always be in the descending state, and release the ammunition donor.
(3)
Pull the handle back,
Turn the safety switch to
"
Liberate yourself
"
Location,
Control the grip with both hands, press the launch pedal, and then control the grip to slowly forward and return. When the hook reaches the front expansion part, it will release the bottom of the bullet.
At this time, the edge part fell back because it could not enter the bore forward, and the shell was safely caught.
The reed on the connecting shaft is easy to loosen and get stuck on the automatic latch cover, which makes the re-entry not in place. Replace the reed. Re-entry spring fails, replace the spring or replace it.
New body tube; The plug tightener is screwed too tightly and slightly loose; There is too much friction in the back seat, and there is too much sludge or bumps in the parking ring and slideway of the re-entry machine cradle.
Wipe, oil or documents.
2
、
During the shooting, the shells can't reach the ammunition supply port.
There are two situations in which the shells of the Sanqi anti-aircraft gun can't reach the ammunition feeder. One is that the shell can't reach the ammunition supply port when it is loaded for the first time, and the other is continuous shooting.
The shell can't press on the ammunition feeder.
(
1
) When it was first installed, the shells could not be pressed on the loader.
phenomenon
：
The grip has been pulled in place and put into the back buckle, but the shell can't be pressed down. Cause: The key point of pressing the bullet is incorrect, resulting in
"
Riding bomb
"(
Up and down or left
Tilt to the right
)
Trapped in a bomb. Solution: first put a shell on the bomb conveyor belt from the back wall, and then launch it. If you can connect,
If the blasting continues, it should be eliminated after the situation permits, otherwise it should be eliminated immediately; Latch of Ejector and Brake
(
***
seven
individual
)
Any interruption will lead to
The shooting action is interrupted, so that the brake can't be opened, and the protruding angle prevents the projectile from rotating, so that the projectile can't be pressed on the projectile feeder, and the projectile should be unloaded.
Fill the machine, find and replace the bolts.
(
2
) When shooting continuously, the shells can't reach the ammunition feeder.
Phenomenon: The movable shuttle is in an insurance state.
(
Jumping shuttle
)
. At this point, you can pull the handle and press the bullet again, but you still can't press it. Find out the reason and eliminate it.
Causes and solutions
：
(1) The cartridge case is stuck in the ejector. If the pressure spring is not correct, use a screwdriver to correct the shell or exit the heavy pressure; If the magazine gets stuck, it's too late.
Tilt when releasing or pressing the housing, then pull the housing out and press it again. ② The ejector body cannot rotate. The lobe on the brake body or the bolt of the small lever is broken, which is more?
Replace bolts; The perforated iron spring on the bomb conveyor is invalid and replaced; The barrel is slowly pumped, and the projectile is pressed when it re-enters, and the ejector is held back, and then the shell is retreated and pressed again.
Wipe the inner cavity of the gun bore, and weld the punch on the gun body or the punch arm of the bobbin. ③ The safety of movable shuttle fails. When re-entering, the folded board cannot move with the pressure.
The movable folding plate is downward, and the shell can't be pressed down. Replace the movable reciprocating spring.
three
When shooting, the shell falls from the ammunition conveyor.
It is necessary to determine whether the bomb was dropped when it was pressed or dropped when it was lost. Press it and it will fall off. There is something wrong with the grappling hook. Drop bullets when transporting bullets, lack of spring force, gun
The latch cannot be closed or closed prematurely. Cause and solution:
( 1)
When the bullet was pressed, it dropped, and it was not caught by the grappling hook. Elastic compression directional rail wear, use.
J422
Covered electrode welded and repaired the back wall; Bomb hook
The spring of the shaft, the feeding body or the feeding hook is damaged, repaired or replaced by welding, and a gasket can be added when there is no spare spring; The ammunition feeder body moves forward prematurely and locks automatically.
Insufficient height, contact wear, bronze skateboard seat wear, etc. And the height of the spontaneous latch is adjusted to be higher than that of the transmitting latch.
0.8
~
1.0 mm
, or more
Replace the lock spring or repair the worn part of the spontaneous lock by welding.
(2)
Dropping a bullet when dropping it is a lack of motivation to drop it. The transmission spring fails, the impulse is small when it is ejected into the chamber, the barrel cannot be reversed, and the chamber cannot be closed.
The spring will fall off automatically. Please replace the spring.
If there is no spare spring, add shims.
(3)
There are obstacles on the ammunition line. Pulling out the barrel is slow, and the cartridge is bounced back by the unreduced cartridge case. Take out the cartridge case with a big screwdriver or a puller; Bullet puller
Body drooping,
The injector body is not firmly fixed and rubs against the shell.
Tighten the fixing screw or replace the copper sleeve;
The latch closes prematurely,
The bolt is worn,
The upper part is big, the lower part is small, the spool is broken, the iron is worn and so on. , causing the bolt to close and fall off prematurely, so replace or insert the bolt body.
(4)
The latch cannot be closed or closed prematurely. The hook rod of the locking device is broken, welded or replaced; The protruding part of the gripper is damaged and the loaded shell is rushed out.
Replace the bobbin and do not reverse it.
four
The bolt was not fastened properly when shooting.
The bolt body did not contact the bolt body fixing plate on the gun tail, and the top cover of the bolt body was not completely exposed. Treatment: Pull the handle out of the shell in the bore and eject it again.
Strike. If it can be locked tightly, it is a shell failure; When it is still not tightly closed, the bolt is faulty. Causes and elimination methods:
( 1)
The closing force of the latch is insufficient, and the latch spring fails. Replace the spring.
(2)
The latch body is blocked. The primer of the shell protrudes and blocks the latch body. At this time, another shell should be changed; Shells and medicine rooms are too dirty and bruised, which makes shells have no
Can completely enter the bore to block the gun body, exit the shell casing, clean it and then press it in to shoot; Pay attention to the fact that the latch body and latch cavity are short of oil or too dirty, and the friction increases.
Spindle oil, clean before shooting; Barrel rotation
(
single
37)
The bobbin cannot be completely poured into the gap, and the shell is blocked and cannot be completely inserted.
Chamber, resulting in loose locking, tighten the barrel and fix it firmly.
five
、
Don't get angry when shooting.
(
Cann't ring
)
The bolt body has been locked tightly, and there is a shell casing in the bore, which just doesn't sound. Treatment: Under normal circumstances, it is necessary to stop taking drugs.
1
After minutes, pull the handle to bounce back to prevent
Casualties caused by late ignition; In an emergency or when the barrel temperature rises to
300
When the temperature is higher than 100℃, the barrel looks brown, so it must be taken out immediately to prevent it.
Blow up this room. Re-shoot the bullet If it still doesn't catch fire, check the primer immediately. If the primer is scratched deeply and the shell is faulty, please replace the shell. You should continue.
Bullet shooting; No strike marks, firing device failure, decomposition and elimination.
( 1)
Bolt failure. If the primer of the cartridge case or propellant cartridge case is wet, replace the cartridge case; The primer installation sinks deeply, and the sinking amount exceeds.
0.5 mm
, striker impact
The primer is not deep enough to blow the primer cover. Replace the shell and take it out after shooting. The method is to twist the bottom fire with a primer wrench.
(2)
The ignition device is faulty. If the needle tip is too short or broken, replace the needle tip; If the needle spring fails or the needle chamber is too dirty, wipe the needle with oil and replace it.
Needle spring; Needle retraction
nine
Millimeter impact force is weak, repair the worn corner of the firing bar or the square key of the firing bar body or replace the firing bar by welding; beat
This mark is deep and not straight,
Check that sag of the lock body,
Use first
J507
The coated covered electrode carries out hard surface treatment on the worn part of the semi-circular protruding handle of crank arm,
Then use the mandrel to clamp crank arm to the car.
Carry out machining and heat treatment on the bed, check the size, the impact marks are deep and positive, the propellant charge and primer are wet, and replace the shell casing.
six
、
The bullet can't be pulled out of the gun chamber after it is fired.
When the anti-aircraft gun can't extract the shell, open the cover plate on the cradle to see if the bolt is open. The latch body cannot be opened automatically, which belongs to automatic latch opening.
If the cover is not fixed properly, it will come out automatically when shooting and the automatic latch cover will be fixed again; Friction and wear between the pulley on the switch shaft and the curved chute of the automatic latch cover or
Damaged, reinstall the pulley; The back seat is too short, and the parking machine is out of order. Remove the parking machine and refill the liquid. Wipe bolts and holes.
Second, the scope machine (high and low machine, balancing machine, direction machine) fault causes and troubleshooting methods.
1
The high-low machine and the balancing machine are difficult to move.
( 1)
The high-low machine and the balance machine move in the same direction.
(
Up and down
)
Difficulties. Causes and treatment methods; The balancing machine is not properly adjusted. When it's hard to let go, relax.
Balance spring, which is compressed when it is difficult to drive high. When adjusting, open the gun body to the highest position, and pay attention to make the compression degree of the springs on both sides consistent and turn the force.
Difference x
2 kg
; The balancer spring fails, and the spring rusts, jams or breaks after water enters. Replace the spring of the balancer.
(2)
It is difficult for the high-low machine and the balance machine to move in both directions. Cause and solution: The high and low tooth arcs are too tightly meshed with the high and low gears, and the eccentric cylinder will rotate to.
Flexible until; Worm and worm gear are engaged too tightly. Loosen the screw between the worm gear box and gear box. If it becomes lighter, adjust the bearing sleeve on the outside of the worm gear or.
Add a gasket between the gear box and the worm gear box and adjust it with the screw cover on the gear box; The meshing of two bevel gears is too tight and the adjustment is flexible; Large and small speed gears and
Open,
Low gear engagement is too tight,
Add gaskets between boxes;
Screw rings on both sides of the transmission box,
The nut and end nut of the worm shaft press the bearing too tightly,
Loosen the screw ring or nut appropriately; The bearings of various parts of the high-low machine and the balance machine are damaged or pressed too tightly. Replace the bearing and loosen the pressure screws at both ends of the shaft properly;
The supporting ring and lifting lug of the balancing machine are not flexible in rotation, so they are decomposed and wiped.
(3)
Uneven movements. Causes and treatment methods
：
Bending of rotating shaft or other transmission shaft of high and low machine, cold straightening of bending degree; Tooth arc, gear, worm wheel,
There are bumps on the worm, and the metal in the bump is cleaned; There are pits and bumps on the bucket of the balancing machine. Remove the protruding metal from the barrel, and there are pits to use.
Shape tool calibration.
(4)
High and low machine skidding
(
Can't change speed or move slowly.
)
. cause
：
Transmission pressure ring is not compressed or the friction coefficient is too small.
The high-low machine does not work when rotating at low speed.
(
Slipping in the first gear: in the first gear, you didn't step on the speed change pedal, and there was a fault between the connectors.
)
. Bending of transmission rod
If the bending or adjustment is too short, the bending degree should be corrected, and the transmission rod should be adjusted appropriately, and some should be screwed out of the connecting cylinder; The movement of that shift lev in the worm shaft is inflexible,
Bending, excessive sludge, straightening, decomposition and wiping; If the variable speed spring fails, replace the spring; Variable speed pressure ring and gear pressure ring are deformed, worn or oiled and rubbed.
Wipe and handle correctly; The end face of the gasket in contact with the low-speed gear sleeve is worn, and the flange thickness of the gasket is less than.
2.5 mm
Between the bushing and the sleeve
Add gasket and adjust its thickness to.
2.8
~
2.9 mm
When rotating at high speed, the high-low machine does not act.
(
Two-speed slip: it is two-speed when stepping on the variable speed pedal, and there is a fault between the connectors.
)
. Transmission tension
Adjust the lever too long, shorten it; The transmission rod, transmission rod and bottom cover hole are worn with their respective connecting shafts, and the aperture is larger than.
0.8 mm
When, should.
Prepare the connecting shaft; The gear lever was worn, so it was used.
J422
Covered electrode welding repair; The variable speed pressure ring and the gear pressure ring are worn, deformed and oily, and gaskets should be added to remove oil;
The nut above the worm is loose or the clearance of the upper end bearing of the high-speed gear lining is too large.
Add a washer,
Adjust the gap to
0.25
~
0.3 mm
Between;
2
Trouble shooting of steering gear.
Troubleshooting methods:
The rotating part of the bracket is engaged with the fixed part,
Re-decomposition and combination;
The ball of the lower bracket ball belt is worn,
Change the ball,
And pay attention to maintenance;
The lower bracket is too dirty, and the lower bracket is not properly adjusted.
Clear and flexible adjustment;
The variable speed pressure ring and the gear pressure ring are worn,
Deformation and lubricating oil, add gasket to remove oil sludge.
The steering gear doesn't work at low speed.
(
Slipping in the first gear: in the first gear, you didn't step on the speed change pedal, and there was a fault between the connectors.
)
. Bending of transmission rod
Bend or adjust too short, correct the curvature, adjust the transmission rod properly, and screw out some from the connecting cylinder; The gear lever is inflexible and bends in the gear shaft.
Too much sludge, straightening, decomposing and wiping; If the variable speed spring fails, replace the spring; The variable speed pressure ring and gear pressure ring are deformed and worn or have oil, so they should be wiped.
Correction; The end face of the gasket in contact with the low-speed gear sleeve is worn, and the flange thickness of the gasket is less than.
2.5 mm
When in use, a washer is added between the bushing and the sleeve,
Adjust its thickness to
2.7
~
2.9 mm
When rotating at high speed, the steering gear does not work.
(
Two-speed slip: it is two-speed when stepping on the variable speed pedal, and there is a fault between the connectors.
)
. Transmission tension
Adjust the lever too long and adjust it shorter; The transmission rod, transmission rod and bottom cover hole are worn with their respective connecting shafts, and the aperture is larger than.
0.8 mm
Time, prepare the company
Connecting shaft; The gear lever was worn, so it was used.
J422
Covered electrode welding repair; The variable speed pressure ring and the gear pressure ring are worn, deformed and oily, and gaskets should be added to remove oil; On the gear
If the square nut is loose or the bearing clearance at the upper end of the high-speed gear liner is too large, add gaskets and adjust the clearance.
0.2
~
0.3 mm
Between;