CN210196108U - Dynamic balance mandrel with end teeth and impeller mounting structure - Google Patents
Dynamic balance mandrel with end teeth and impeller mounting structure Download PDFInfo
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- CN210196108U CN210196108U CN201921200584.1U CN201921200584U CN210196108U CN 210196108 U CN210196108 U CN 210196108U CN 201921200584 U CN201921200584 U CN 201921200584U CN 210196108 U CN210196108 U CN 210196108U
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Abstract
The utility model discloses a take end tooth dynamic balance dabber and impeller mounting structure, the utility model discloses can imitate actual installation requirement and state and carry out dynamic balance test and remove heavily. The shaft body comprises a first supporting section, a threaded section, an auxiliary centering section, a connecting section, an end tooth mounting section, a transmission limiting section and a second supporting section, wherein the first supporting section and the second supporting section are used for being mounted on a dynamic balancing machine and used as rotating supports; the positioning nut is in threaded fit with the threaded section; one end of the washer is in clearance fit with the auxiliary centering section, and the other end of the washer is sleeved on the threaded section in a hollow manner and is attached to the positioning nut; the positioning end teeth are in clearance fit on the end tooth mounting section, and the plane ends of the positioning end teeth are attached to the end faces of the transmission limiting sections for axial positioning. The impeller is sleeved on the shaft body, the end teeth at one end of the impeller are meshed with the positioning end teeth, the other end of the impeller is attached to the gasket, the small-diameter section of the inner hole of the impeller is matched with the auxiliary centering section, and the large-diameter section of the impeller is sleeved on the connecting section in an empty mode.
Description
Technical Field
The utility model relates to a booster technical field especially relates to a take end tooth dynamic balance dabber and impeller mounting structure.
Background
Impeller part is in order to make the structure compacter in impeller machinery and the booster, transmits bigger torsion, realizes effects such as self-centering, processes the hookup location of part and transmission shaft into the end tooth form, and when this structure part carries out the dynamic balance and removes the heavy, adopts the tapering dabber to pass the part hole more, relies on the frictional force of part and dabber to drive the part by the dabber, carries out the dynamic balance again and detects.
However, the situation that the dynamic balance result is unstable due to the fact that the parts are large, the weight is heavy, the inner hole is small and the matching length of the inner hole is too short sometimes occurs because the passing core shaft cannot completely bear the weight of the parts in the using process and tiny deflection occurs, so that the data judgment of equipment is influenced, meanwhile, the length of the inner hole is too short, the matching length is too short when the taper mandrel is used for matching, the effective contact area is too small, the transmission and the positioning are not reliable, the method is different from the actual assembly process (when the machine is actually installed, the end teeth of the parts are connected with the main shaft through the end teeth and automatically centered), so that the dynamic balance weight removing result is inconsistent with the state after the machine is installed, unmeasurable errors exist, the noise and vibration are large in the operation process of the main shaft after the machine is installed, the dynamic balance work of the main shaft and the impeller needs to be repeatedly assembled and disassembled, checked and reworked, and the method is a quality risk point.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide a take end tooth dynamic balance dabber and impeller mounting structure, the utility model discloses can imitate actual installation requirement and state and carry out dynamic balance test and deduplication.
The purpose of the utility model is realized like this:
a dynamic balance mandrel with end teeth comprises a mandrel body, a positioning nut, a gasket and positioning end teeth, wherein the mandrel body sequentially comprises a first supporting section, a threaded section, an auxiliary centering section, a connecting section, an end tooth mounting section, a transmission limiting section and a second supporting section along the axial direction, and the first supporting section and the second supporting section are used for being mounted on a dynamic balancing machine to serve as rotary supports; the positioning nut is in threaded fit with the threaded section; one end of the washer is in clearance fit with the auxiliary centering section, and the other end of the washer is sleeved on the threaded section in a hollow manner and is attached to the positioning nut; the locating end tooth is sleeved on the end tooth mounting section, the plane end of the locating end tooth is in fit axial locating with the end face of the transmission limiting section, and a locating space of the impeller is formed between the tooth face end of the locating end tooth and the gasket.
Preferably, the diameters of the auxiliary centering section, the connecting section and the end tooth mounting section are the same, and the diameters of the first supporting section and the second supporting section are smaller than the diameters of the auxiliary centering section, the connecting section and the end tooth mounting section.
Preferably, the gasket is provided with a yielding annular groove for yielding the boss at the end part of the impeller, and the gasket can adapt to impellers with end-face bosses and impellers without end-face bosses.
Preferably, the positioning end tooth is in interference fit with the end tooth mounting section of the shaft body.
Preferably, the inner hole of the positioning end tooth is matched with the auxiliary centering section, the connecting section and the end tooth mounting section of the shaft body.
The utility model provides an impeller mounting structure for dynamic balance experiment, includes dynamic balancing machine, impeller and takes end tooth dynamic balance dabber, first support section, second support section are installed on the dynamic balancing machine, the spacing section of transmission is connected with dynamic balancing machine power, the impeller cover is on the axis body, and is located between the flank of tooth end and the packing ring of location end tooth, and the end tooth and the meshing of location end tooth of impeller one end, the other end and the laminating of packing ring of impeller, the path section and the supplementary centering section cooperation of impeller hole, the big footpath section free cover of impeller are on the linkage segment.
Since the technical scheme is used, the utility model discloses improve the dynamic balance instrument that the friction drove the mode (original dabber and part friction drive) for taking the dynamic balance dabber of end tooth, can imitate actual installation requirement and state and carry out dynamic balance test and weight removal, shortened dabber length, reduced consumeing of material, the epaxial location end tooth of dynamic balance dabber and axis body separately make, interference fit again makes processing convenience, reduces and makes the degree of difficulty and cost. This approach also has the following advantages:
the dynamic balance core shaft has better universality: the parts can be used universally as long as the external diameter and the internal diameter of the end tooth are the same or similar (the end tooth structure must be consistent); for example, the tool can be used for one part with the diameter D500 and the diameter D200 as long as the end tooth structure is the same, but the old design scheme is not feasible, because the diameters of the parts are different, the stress on the shaft is different, in addition, if the sizes of the inner holes of the two parts are different, even if the difference is 1mm, the tool of the old scheme cannot be used, but the scheme has no limitation (can be positioned by the end tooth and the gasket), the end tooth structure of the product of the same company is generally uniform, the size change is small, and only a few of the patent structures are needed to meet the production;
the positioning effect is better: the matching mode of the taper mandrel is that the taper mandrel is matched with the rest positions in a line contact mode to form gaps, and the effect is extremely poor particularly under the condition that the axial length of a hole is very small; but the end teeth are matched with the self-centering function, and an auxiliary centering structure is manufactured on the mandrel, so that the coaxiality of the assembled parts can be ensured to be good, and the positioning effect is improved;
the transmission torsion is more reliable: the taper mandrel is in line contact, the part is driven to rotate mainly by friction force, the transmission effect is influenced by the contact area, and under the condition of heavier part, the transmission torque force is not reliable because the deflection of the mandrel occurs; the end tooth connecting structure is driven by the tooth surface, and the tooth surface does not move relatively, so that the torque transmission is very reliable;
the result is more true: the mandrel connected with the end teeth has the same state as the actual installation state, so that the result is more real, and the error is smaller;
the problem of mandrel deflection is solved: when the total length of the part is long and the aperture is small, the mandrel has certain deflection when in use, the dynamic balance result is influenced, and the end tooth mandrel is connected with the end tooth and is irrelevant to the aperture, so that the problem can be effectively avoided, and the result is more accurate.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the shaft body.
Reference numerals
In the attached drawing, 1 is the axis body, 2 is set nut, 3 is the packing ring, 4 is location end tooth, 5 is first support section, 6 is the screw thread section, 7 is supplementary centering section, 8 is the linkage segment, 9 is the end tooth installation section, 10 is the spacing section of transmission, 11 is the second support section, 12 is the impeller.
Detailed Description
Referring to fig. 1 and 2, the dynamic balance mandrel with the end teeth comprises a mandrel body, a positioning nut, a washer and positioning end teeth, wherein the mandrel body sequentially comprises a first supporting section, a threaded section, an auxiliary centering section, a connecting section, an end tooth mounting section, a transmission limiting section and a second supporting section along the axial direction, and the first supporting section and the second supporting section are used for being mounted on a dynamic balancing machine to serve as rotary supports; the positioning nut is in threaded fit with the threaded section; one end of the washer is in clearance fit with the auxiliary centering section, and the other end of the washer is sleeved on the threaded section in a hollow manner and is attached to the positioning nut; the gasket is provided with a yielding annular groove for yielding a boss at the end part of the impeller. The location end tooth cover is in on the end tooth installation section, in this embodiment, the interference fit of location end tooth and the end tooth installation section of axis body, the interference magnitude is not more than 0.015 mm. The plane end of the positioning end tooth is attached to the end face of the transmission limiting section for axial positioning, and a positioning space of the impeller is formed between the tooth face end of the positioning end tooth and the gasket.
The diameter of supplementary centering section, linkage segment, end tooth installation section is the same, the diameter of first support section, second support section is less than the diameter of supplementary centering section, linkage segment, end tooth installation section, the diameter of the spacing section of transmission is greater than the diameter of location end tooth, the spacing section of transmission is the pulley-like, uses as the driven belt pulley of dynamic balancing machine, the diameter of screw thread section is between the diameter of first support section, the diameter of supplementary centering section. And the inner hole of the positioning end tooth is matched with the auxiliary centering section, the connecting section and the end tooth mounting section of the shaft body.
Referring to fig. 1, an impeller mounting structure for dynamic balance experiment includes a dynamic balancing machine, an impeller and a dynamic balance mandrel with end teeth, wherein a first supporting section and a second supporting section are mounted on the dynamic balancing machine, a transmission limiting section is in dynamic connection with the dynamic balancing machine, the impeller is sleeved on a shaft body and is located between a tooth surface end of a positioning end tooth and a gasket, the end tooth of one end of the impeller is meshed with the positioning end tooth, the other end of the impeller is attached to the gasket, a small-diameter section of an inner hole of the impeller is matched with an auxiliary centering section (in clearance fit or empty fit), and a large-diameter section of the impeller is empty sleeved on a connecting section.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides a take end tooth dynamic balance dabber which characterized in that: the shaft body is sequentially provided with a first supporting section, a threaded section, an auxiliary centering section, a connecting section, an end tooth mounting section, a transmission limiting section and a second supporting section along the axial direction, and the first supporting section and the second supporting section are used for being mounted on a dynamic balancing machine to serve as rotating supports; the positioning nut is in threaded fit with the threaded section; one end of the washer is in clearance fit with the auxiliary centering section, and the other end of the washer is sleeved on the threaded section in a hollow manner and is attached to the positioning nut; the locating end tooth is sleeved on the end tooth mounting section, the plane end of the locating end tooth is in fit axial locating with the end face of the transmission limiting section, and a locating space of the impeller is formed between the tooth face end of the locating end tooth and the gasket.
2. The dynamic balance mandrel with the end teeth as claimed in claim 1, wherein: the diameters of the auxiliary centering section, the connecting section and the end tooth mounting section are the same, and the diameters of the first supporting section and the second supporting section are smaller than those of the auxiliary centering section, the connecting section and the end tooth mounting section.
3. The dynamic balance mandrel with the end teeth as claimed in claim 2, wherein: the gasket is provided with a yielding annular groove for yielding a boss at the end part of the impeller.
4. The dynamic balance mandrel with the end teeth as claimed in claim 2, wherein: and the positioning end teeth are in interference fit with the end tooth mounting section of the shaft body.
5. The dynamic balance mandrel with the end teeth as claimed in claim 4, wherein: and the inner hole of the positioning end tooth is matched with the auxiliary centering section, the connecting section and the end tooth mounting section of the shaft body.
6. The utility model provides an impeller mounting structure for dynamic balance experiment which characterized in that: the dynamic balance core shaft with the end teeth comprises a dynamic balancing machine, an impeller and the dynamic balance core shaft with the end teeth as claimed in claim 1, wherein the first supporting section and the second supporting section are installed on the dynamic balancing machine, the transmission limiting section is in dynamic connection with the dynamic balancing machine, the impeller is sleeved on the shaft body and is located between the tooth surface end of the positioning end tooth and the gasket, the end tooth at one end of the impeller is meshed with the positioning end tooth, the other end of the impeller is attached to the gasket, the small-diameter section of the inner hole of the impeller is matched with the auxiliary centering section, and the large-diameter section of the impeller is sleeved on the connecting section in an empty.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921200584.1U CN210196108U (en) | 2019-07-29 | 2019-07-29 | Dynamic balance mandrel with end teeth and impeller mounting structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921200584.1U CN210196108U (en) | 2019-07-29 | 2019-07-29 | Dynamic balance mandrel with end teeth and impeller mounting structure |
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| CN210196108U true CN210196108U (en) | 2020-03-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230608A (en) * | 2019-07-29 | 2019-09-13 | 重庆江增船舶重工有限公司 | A kind of band end tooth dynamic balancing mandrel and impeller installing |
-
2019
- 2019-07-29 CN CN201921200584.1U patent/CN210196108U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230608A (en) * | 2019-07-29 | 2019-09-13 | 重庆江增船舶重工有限公司 | A kind of band end tooth dynamic balancing mandrel and impeller installing |
| CN110230608B (en) * | 2019-07-29 | 2024-10-11 | 重庆江增船舶重工有限公司 | Take end tooth dynamic balance dabber and impeller mounting structure |
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