Method and device for loading teeth of gear wheels during strength testing

FIELD: mechanical engineering.

SUBSTANCE: method comprises mounting gear made of at least one gear wheel to be tested and pinion that engages it on two parallel shafts, loading the gear wheel to be tested, and locking the shaft with the gear wheels to be tested in a given phase of engagement by means of movable wedges. The device for loading comprises base provided with loader and gear made of the gear wheel to be tested that engages the pinion mounted on the parallel shafts set in the bearings. The device has at least one gear with gear wheel to be tested and two movable wedges mounted on a separate support of the base. Each shaft is provided with the lever. The lever mounted on the shaft with the pinions is connected with the loader, and the lever mounted on the shaft with the wheels to be tested is connected with the movable wedges that allow it to be locked in a given phase of the engagement of the gear wheels to be tested.

EFFECT: enhanced reliability.

2 cl, 2 dwg

 

The invention relates to the field of engineering, namely to test the technique, and can be used to study the strength of the gears and their elements.

There is a method for testing the strength of the gears and their elements, in which the tested gear wheel rigidly connected with the shaft having slots, mounted on anti-friction bearings in vertical racks detachable device case and connected with a screw and slot connection with flange-leash. The nagruzhatelya impact on the sub-lever, which is loaded through the element platic transmits the load on the teeth of the test gear (RU, patent No. 2139512 C1, CL, G 01 M 13/02, 1999).

The disadvantage of this method is the inability to determine the strength helical, herringbone, curvilinear and circular teeth of cylindrical gears, which in contrast to the cylindrical spur wheels with vertical impact of nagruzhatelya and loading item on the test tooth bevel gears occurs axial reaction, which is very difficult to compensate for. In addition, for optimal contact loading element with a tooth of the test cylindrical wheel requires an exact match of the contact of the mating surfaces, which is difficult to perform on from the nutrient loading elements-platico.

There is a method for testing the strength of cylindrical gear wheels and their elements, taken as a prototype, in which the test gear and coupled with it the gear rigidly mounted on parallel shafts, located on the bearings in split casing rigidly mounted on the base. Before testing select the joints in the kinematic chain loading at rated static load. Then nagruzhatelya affect the adapter, through which the loaded element transmits load per tooth additional spur gears and the torque is transmitted through the shaft to test the gear in contact with the mating gear (RU, patent No. 2193177 C1, class G 01 M 13/02, 2002).

The disadvantage of this method is the low reliability due to the complexity of the kinematic chain loading and the need for before testing a number of preliminary activities for the sample of all gaps and strengthen the fastening of the individual elements.

A device for testing the strength of the gears and their elements, comprising a housing with installed test gear with the shaft, nagruzhatel interacting with the latest adapter with a loading element, provided with anti-friction bushings that have tested the e gear with the shaft, with slots, United slots and screw with flange-leash (ange-lever), secured the support strap on the outside of the casing, and provided with straps for insurance against twisting of the test gears, and the adapter is made in the form of a lever mounted on its axis in the housing, the loading element is designed as replaceable plastic (RU, patent No. 2139512 C1, class G 01 M 13/02, 1999).

A disadvantage of the known devices is the inability to determine the strength helical, herringbone, curvilinear and circular teeth of cylindrical gears, which in contrast to the cylindrical spur wheels with vertical impact of nagruzhatelya and loading item on the test tooth bevel gears occurs axial reaction, which is very difficult to compensate for. In addition, for optimal contact loading element with a tooth of the test cylindrical wheel requires an exact match of the contact of the mating surfaces, which is difficult to perform on separate loading elements-platico.

A device for testing the strength of cylindrical gear wheels and their elements, taken as a prototype, comprising a housing with installed test gear with the shaft, nagruzhatel interacting with the last lane is hodnik in the form of a lever, installed on its axis with the loading element in the form of replaceable plastic, are secured to the flange lever, provided with a base, a cylindrical gear located in the housing and consisting of the test gears mated with the gear mounted on parallel shafts located in the bearings (the bearings), cylindrical spur gear mounted on the shaft of the test gears are located in the bearings, a support for the installation of the adapter with the loaded element in contact with the tooth spur bevel gears, and provided with a rod connected to the housing and on the shaft coupled to the pinion flange installed connected to move the flange lever (RU, patent No. 2193177 C1, class G 01 M 13/02, 2002).

The disadvantage of this device is the necessity of using additional technological spur wheel, a second bearing shaft bearing gear case, the cantilever is suspended on the rod, substantially remote from the primary shaft and the point of application of load, which together reduces the rigidity of the entire kinematic chain and requires to test a number of preliminary activities for the sample of all gaps and strengthen the fastening of the individual elements.

Technical is to them a result of the invention is to improve the reliability and accuracy of determining the load capacity of helical, Chevron, with curvilinear and circular teeth, with onopordum and multipair toothed cylindrical gears in different phases of gear meshing, the simultaneous testing of two gears (gear).

This technical result according to the method of loading gear wheel teeth when testing for Flexural strength and toughness is achieved in that in the method of loading gear wheel teeth when testing for Flexural strength and endurance, which consists in the fact that hard-set gear, consisting of the test gears and related gear on two parallel shafts used nagruzhatelya test gear, install at least one gear with the test gear, separat movable wedges shaft with subjects gears in the desired phase of their engagement.

This technical result on the device loading gear wheel teeth when testing for Flexural strength and endurance is achieved by the fact that the device loading gear wheel teeth when testing for Flexural strength and endurance containing base to host nagruzhatelya, gear, consisting of the test gears paired with the gear installed on the computers is lnyh shafts, located in the bearings, provided with at least one gear with the test gear, two movable wedges mounted on a separate support base, each shaft is rigidly mounted on the lever, one of which is on the shaft with gears associated with nagruzhatelya, and the other arm on the shaft with subjects wheels associated with the moving wedges, allowing you to secure it to the shaft in the desired phase of the engagement of the tested gears.

The claimed method and the device are illustrated by the drawing.

Figure 1 shows a General view of the device; figure 2 - a section a-a figure 1.

The device (figure 1 and 2) to implement the proposed method consists of the base 1, is placed on the nagruzhatelya 2, the shaft 3 of the bearing supports 4 and 5 and the shaft 6 of the bearing supports 7, 8, private support 9 with established therein movable wedges 10 and 11, the rack 12 with adjustable stops moving wedges 10 and 11. The shafts 3 and 6 are mounted parallel to each other. On each shaft is rigidly mounted on the lever: on the shaft 3, the lever 15, and the shaft 6 of the lever 16. On the shafts 3 and 6 are rigidly mounted gear, consisting of subjects gears 17 and 18 on the shaft 3, associated respectively with the gears 19 and 20, the shaft 6. For testing gears can have one of the gears. Supports 4, 5, 7, 8 and 9, the rack 12, nagruzhatel 2 W is stco established on the basis of 1.

The lever 15 on the shaft 3 with subjects wheels 17 and 18 is associated with the moving wedges 10 and 11, and below it is supported on the inclined surface of the rolling wedge 10, and the top is fixed a movable wedge 11, allowing you to lock the lever 15 with the shaft 3 in the desired phase of the engagement of the tested gear wheels 17 and 18, and the other lever 16 on the shaft 6 with the gears 19 and 20 associated with nagruzhatelya 2.

The device operates as follows.

Firmly establish one or two gears, consisting of the subjects of gear wheels 17 and 18 and associated gears 19 and 20, on parallel shafts 3 and 6.

When put into meshing gear wheels 17 and 19, 18 and 20 of the lever 16 is brought into contact with nagruzhatelya 2, and the lever 15 to the inclined surface of the rolling wedge 10, the position of which regulate emphasis 13, locking them from the bottom position of the lever 15, and the top lever 15 is fixed a movable wedge 11, the position of which regulate the stop 14 on the rack 12, with separat movable wedges 10 and 11, the shaft 3 with subjects toothed wheels 10 and 11 in the desired phase of their engagement.

Load the nagruzhatelya 2 power p on the associated arm 16 and through it to the shaft 6 and the gear 19, 20, the teeth of which the load is respectively transmitted to the teeth of the tested gear wheels 17, 18, the shaft 3, the lever 15, the wedge 10, the support 9, hinging on the basis of 1.

Shebna the strength of the teeth of gear wheels 17 and 18 is determined by static load from the nagruzhatelya 2 on the lever 16, and Flexural endurance - under cyclic load, transmitted from the nagruzhatelya 2. Phase of the engagement and the contact area of the teeth of gear wheels 17 and 18 are governed by the angle α rotation of the lever 15, which, in turn, depends on the position of the wedges 10 and 11 relative to the support 9, which is installed with the stops 13 and 14 on the rack 12.

For testing single gears (wheels) on the shafts 3 and 6 establish one toothed wheel, for example 17 and 19, which are in engagement with each other.

So you can load and test not only spur, and herringbone (posted by poluchavshimi) and helical (right and left) wheel comprising both single and dual gears.

The inventive method and device can also conduct tests on Flexural strength and endurance gear wheel teeth and pausebreak herringbone gear that is very difficult to do otherwise. With the help of the device also can be tested simultaneously and two pairs of gears with different number of teeth, but with the same center-to-center distance.

1. The method of loading gear wheel teeth when testing for Flexural strength and endurance, which consists in the fact that hard-set gear, consisting of the test gears and coupled with nimustine, on two parallel shafts, the load nagruzhatelya test gear, wherein the set of at least one gear with the test gear, separat movable wedges shaft with subjects gears in the desired phase of their engagement.

2. Device loading gear wheel teeth when testing for Flexural strength and endurance containing base to host nagruzhatelya, gear, consisting of the test gears with mating gears mounted on parallel shafts located in the bearings, characterized in that it is provided with at least one gear with the test gear, two movable wedges mounted on a separate support base, each shaft is rigidly mounted on the lever, one of which is on the shaft with gears associated with nagruzhatelya, and the other arm on the shaft with subjects wheels associated with the moving wedges that allows you to secure it to the shaft in the desired phase of the engagement of the tested gears.



 

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