CN210322310U - Ejection mechanism of butt joint tool for generator test - Google Patents

Abstract

The utility model discloses a generator is experimental with ejection mechanism of butt joint frock installs on the rear end that is located the butt joint frock and the rear flange board that docks with the generator and including ejection head, rotatory screw rod, connecting screw, fixation nut and spacer pin. The inner hole of the ejection head is a counter bore with a small front part and a big back part; the ejection head is arranged in a mounting hole which is arranged at the position close to the edge of the rear flange plate; the rotary screw rod sequentially comprises an external thread section, a barrier disc and an internal thread section from front to back; the inner thread section is inserted into an inner hole of the ejection head from the front end of the ejection head; the connecting screw is inserted into the inner hole of the ejection head from the rear end of the ejection head and is in threaded connection with the inner hole of the inner thread section; the fixed nut is in threaded connection with the external thread section of the rotary screw, and the rear end face of the fixed nut is welded on the front end face of the rear flange plate; one end of the limiting pin is inserted into the pin hole of the fixing nut, and the other end of the limiting pin is inserted into the pin groove of the ejection head. The utility model discloses an ejection mechanism can avoid the damage to the butt joint face of generator when demolising the butt joint frock.

Description

Ejection mechanism of butt joint tool for generator test

Technical Field

The utility model relates to a generator leaves factory type is experimental with tool equipment, concretely relates to generator is experimental with ejection mechanism of butt joint frock.

Background

At present, after the complete generator is manufactured in China, factory test tests need to be carried out on the complete generator performance so as to know whether the basic performance data of the generator meets the national standard and the requirements of customers. The generator performance test is generally divided into a factory test and a model test. The general factory test comprises direct current resistance, insulation resistance, ground withstand voltage and no-load test: the conventional performance tests of voltage, current, frequency, rotating speed, power factor, vibration, noise and the like are carried out according to national standards or technical condition regulations, and whether the factory can be delivered is checked. The type test is a test performed according to all items specified by national standards or technical conditions, that is, the generator needs to be comprehensively examined for other performances such as temperature rise, load, locked rotor and the like in addition to the test included in a general factory test, so that a special generator test device needs to be butted with the generator on a special test platform for carrying out a load test.

Because the middle-large-power generator produced at present adopts a single-bearing structure, a butt joint tool with a flange structure is required to be butted with a testing machine when the generator is butted with testing equipment, namely, a single-bearing type support is converted into a double-bearing type support with higher stability, and the accurate concentricity and rigidity of the generator and the testing machine are ensured. In order to keep concentricity, the matching precision of the butt joint tool, the end cover of the shaft extension end of the generator and the spigot of the connecting end of the testing machine is relatively high, so that the butt joint tool is relatively complex to install, the time generated by butt joint is correspondingly longer than that of a common generator, similarly, the dismounting of the butt joint tool after the test is finished is also time-consuming, and the butt joint tool cannot be directly dismounted due to high matching precision, and the following three methods are generally adopted:

1. the matching precision of the end cover of the generator and the butt joint tool is reduced, and the matching clearance is increased, so that the butt joint tool can be easily pulled out;

2. two symmetrical ejection screw holes are formed in the butt joint surface of the butt joint tool and the generator, and the butt joint tool is ejected after a bolt is screwed into the ejection screw holes;

3. the edge of the butt joint face of the butt joint tool and the generator is provided with a plurality of detaching process grooves, the grooves are slightly knocked in by a pry bar during detaching, and the butt joint tool is pulled out after being loosened.

Although the tool can be smoothly disassembled by the three methods, the 1 st method reduces the matching precision, so that the concentricity is reduced after the generator is connected with the test unit, and the test result is influenced; in the methods 2 and 3, the end cover of the generator is made of a casting, the bolt and the pry bar are made of low-carbon steel and harder than cast iron, and scratches or fingerprints are easily generated on the matching surface of the end cover of the generator due to the small contact surface in the knocking-in or ejecting process, so that the apparent quality is influenced. In order to reduce damage, workers need to lightly tap in a rotating mode during operation and repeatedly act for many times, damage to the surface of the end cover is avoided, production efficiency is greatly reduced, and a plane repairing process needs to be added if damage occurs, so that production cost is improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect and provide an ejection mechanism of butt joint frock for generator test, it can avoid when demolising the butt joint frock to the planar damage of generator butt joint, improves production efficiency, reduces the later stage and restores the process, guarantees the apparent quality of generator, has reduced manufacturing cost.

The purpose of the utility model is realized like this: an ejection mechanism of a butting tool for a generator test is arranged on a rear flange plate which is positioned at the rear end of the butting tool and is butted with a generator and comprises an ejection head, a rotary screw rod, a connecting screw, a fixed nut and a limit pin, wherein,

the ejection head is a hollow cylinder, an inner hole of the ejection head is a counter bore with a small front part and a large rear part, and a pin groove is axially formed in the outer circular surface of the ejection head; the ejection head is arranged in a mounting hole which is arranged at the position close to the edge of the rear flange plate;

the rotary screw rod sequentially comprises an external thread section, a blocking disc and an internal thread section from front to back; the outer diameter of the external thread section is smaller than that of the blocking disc; the outer diameter of the blocking disc is larger than the diameter of the small hole of the ejection head; the outer diameter of the internal thread section is smaller than the diameter of the small hole of the ejection head, and the internal thread section is inserted into the inner hole of the ejection head from the front end of the ejection head;

the outer diameter of the screw head of the connecting screw is smaller than the diameter of the large hole of the ejection head and larger than the diameter of the small hole of the ejection head, and the connecting screw is inserted into the inner hole of the ejection head from the rear end of the ejection head and is in threaded connection with the inner hole of the inner thread section;

the fixed nut is in threaded connection with the external thread section of the rotary screw, the outer diameter of the fixed nut is larger than that of the ejection head, the rear end face of the fixed nut is welded on the front end face of the rear flange plate, and a pin hole is axially formed in the end face of the fixed nut;

one end of the limiting pin is inserted into the pin hole of the fixing nut, and the other end of the limiting pin is inserted into the pin groove of the ejection head.

According to the ejection mechanism of the butt joint tool for the generator test, the handle in the shape of a quadrangular prism is further arranged at the front end of the rotating screw rod.

The utility model discloses an it is experimental with ejection mechanism of butt joint frock to generate electricity machine has following characteristics:

1. the rotary ejection face is arranged on the butt joint tool, the rotary ejection mode of the bolt is changed into a linear ejection mode, the rotary ejection is completed on the butt joint tool, the contact area between the ejection mechanism and the butt joint face of the generator is increased, the contact face only plays a supporting role, and damage to the butt joint face of the generator is avoided.

2. When the dismounting operation is carried out, only the rotating screws of the two ejection mechanisms need to be uniformly rotated, and repeated tapping and light rotation are not needed, so that 1/3 is saved compared with the original operation time, and the dismounting is convenient and safe; because the surface of the generator is not damaged, the surface does not need to be repaired, and the production cost and the production period are saved.

3. The existing two symmetrical mounting holes on the butt joint tool are utilized, and the two mounting holes are enlarged to enable the two mounting holes to be capable of mounting ejection heads of the ejection mechanisms, so that the existing butt joint tool does not need to be mechanically processed, the modification cost is reduced, and the tool modification production period is saved.

Drawings

Fig. 1 is an exploded perspective view of an ejection mechanism of a docking tool for generator testing according to the present invention;

fig. 2 is a perspective view of the ejection mechanism of the present invention;

fig. 3 is a front side perspective view of the ejection mechanism of the present invention mounted on the docking tool;

fig. 4 is a rear side perspective view of the ejection mechanism of the present invention mounted on the docking tool;

FIG. 5 is an enlarged view of the portion P in FIG. 4;

fig. 6 is a perspective view of the butt joint tool with the ejection mechanism of the present invention after being connected with the generator.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1 to 6, the ejection mechanism of the docking tool for generator testing of the present invention is installed on a rear flange plate 62 located at the rear end of the docking tool 6 and in docking with the generator 7, and the front end of the docking tool 6 is a front flange plate 61 in docking with the testing unit; the front flange plate 61 and the rear flange plate 62 are connected through a plurality of uniformly distributed supporting rib plates 63; the center of the rear flange plate 62 is also provided with a bearing seat 64, the bearing seat 64 is used for supporting a dummy shaft 65, and the dummy shaft 65 is connected with a rotating shaft of the test unit.

The ejection mechanism of the utility model comprises an ejection head 2, a rotary screw rod 3, a connecting screw 1, a fixed nut 4 and a limit pin 5, wherein,

the ejection head 2 is a hollow cylinder, an inner hole of the ejection head 2 is a countersunk hole with a small front part and a large rear part, and a pin groove 20 is axially formed on the outer circular surface of the ejection head 2; the ejection head 2 is arranged in a mounting hole which is arranged at the edge of the rear flange plate 62 of the butt joint tool 6;

the rotary screw rod 3 sequentially comprises a handle 31, an external thread section 32, a blocking disc 33 and an internal thread section 34 from front to back; the handle 31 is a quadrangular prism, so that an operator can conveniently rotate the rotary screw 3; the outer diameter of the external thread section 32 is smaller than the outer diameter of the blocking disk 33; the outer diameter of the stop disc 33 is larger than the diameter of the small hole of the ejection head 2; the external diameter of the internal thread section 34 is smaller than the small hole diameter of the ejector head 2, and the internal thread section 34 is inserted into the inner hole of the ejector head 2 from the front end of the ejector head 2;

the outer diameter of the screw head of the connecting screw 1 is smaller than the diameter of the large hole of the ejection head 2 and larger than the diameter of the small hole of the ejection head 2, the connecting screw 1 is inserted into the inner hole of the ejection head 2 from the rear end of the ejection head 2 and is in threaded connection with the inner hole of the internal thread section 34 of the rotary screw rod 3, so that the ejection head 2 and the rotary screw rod 3 are connected into a whole;

the fixed nut 4 is in threaded connection with the external thread section 32 of the rotary screw rod 3, the external diameter of the fixed nut 4 is larger than that of the ejection head 2, the rear end face of the fixed nut 4 is welded on the front end face of the rear flange plate 62 of the butt joint tool 6, and a pin hole is axially formed in the end face of the fixed nut 4;

one end of the limiting pin 5 is inserted into the pin hole of the fixing nut 4, and the other end of the limiting pin 5 is inserted into the pin groove 20 of the ejection head 2.

The utility model discloses an ejection mechanism of butt joint frock for generator test when needs dismantle butt joint frock 6 from the generator, rotates rotatory screw rod 3 through handle 31, makes rotary pressure act on fixation nut 4 to the rear end face top that will push out head 2 is on the butt joint face of the end cover of generator 7 and butt joint frock 6's rear flange board 62, thereby will be ejecting forward from the butt joint face of generator with 4 rigid couplings of fixation nut butt joint frock 6 together. Because the limit pin 5 is arranged between the fixed nut 4 and the ejection head 2, when the rotary screw 3 is rotated, although the internal thread section 34 of the rotary screw 3 drives the connecting screw 1 to rotate together, the ejection head 2 cannot be driven to rotate, and therefore scratching of the butt joint surface of the generator 7 by the rear end surface of the ejection head 2 is effectively avoided.

The utility model discloses an it is experimental with ejection mechanism 10 of butt joint frock to generate electricity generator can install two on the back flange plate 62 of butt joint frock 6 symmetrically, and the atress is even when making butt joint frock 6 ejecting. The two mounting holes of the two ejection mechanisms 10 can utilize two of a circle of mounting holes formed on the rear flange plate 62, and the hole diameters of the two mounting holes are enlarged to be larger than the outer diameter of the ejection head 2. During operation, the butt joint tool 6 can be ejected and detached only by uniformly rotating the rotary screws 3 of the two ejection mechanisms 10 at the same time.

The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit and scope of the present invention, therefore, all equivalent technical solutions should also belong to the scope of the present invention, and should be defined by the claims.

Claims (2)

1. An ejection mechanism of a butting tool for a generator test is arranged on a rear flange plate which is positioned at the rear end of the butting tool and is butted with a generator, and comprises an ejection head, a rotary screw rod, a connecting screw, a fixed nut and a limit pin,

the ejection head is a hollow cylinder, an inner hole of the ejection head is a counter bore with a small front part and a large rear part, and a pin groove is axially formed in the outer circular surface of the ejection head; the ejection head is arranged in a mounting hole which is arranged at the position close to the edge of the rear flange plate;

the rotary screw rod sequentially comprises an external thread section, a blocking disc and an internal thread section from front to back; the outer diameter of the external thread section is smaller than that of the blocking disc; the outer diameter of the blocking disc is larger than the diameter of the small hole of the ejection head; the outer diameter of the internal thread section is smaller than the diameter of the small hole of the ejection head, and the internal thread section is inserted into the inner hole of the ejection head from the front end of the ejection head;

the outer diameter of the screw head of the connecting screw is smaller than the diameter of the large hole of the ejection head and larger than the diameter of the small hole of the ejection head, and the connecting screw is inserted into the inner hole of the ejection head from the rear end of the ejection head and is in threaded connection with the inner hole of the inner thread section;

the fixed nut is in threaded connection with the external thread section of the rotary screw, the outer diameter of the fixed nut is larger than that of the ejection head, the rear end face of the fixed nut is welded on the front end face of the rear flange plate, and a pin hole is axially formed in the end face of the fixed nut;

one end of the limiting pin is inserted into the pin hole of the fixing nut, and the other end of the limiting pin is inserted into the pin groove of the ejection head.

2. The ejection mechanism of the butting tool for the generator test is characterized in that a handle in a quadrangular prism shape is further arranged at the front end of the rotating screw.

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