CN201339573Y

CN201339573Y - Main shaft and counter shaft axial adjusting device of positive-displacement pump

Info

Publication number: CN201339573Y
Application number: CNU200820168599XU
Authority: CN
Inventors: 聂如国
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-11-21
Filing date: 2008-11-21
Publication date: 2009-11-04
Anticipated expiration: 2018-11-21

Abstract

The utility model relates to a main shaft and counter shaft axial adjusting device of a positive-displacement pump, which is formed by gaskets. The gaskets are arranged on front bearing parts of the main shaft and the counter shaft, and cling to the inner ring end surface or the outer ring end surface of the front bearings of the main shaft and the counter shaft. The prior main shaft and the counter shaft are not provided with adjusting devices, and the high processing precision of various component parts needs to be designed, so the processing difficulty is great, the scrap rate is higher, the working efficiency is low and the processing cost is high. The thickness of the gaskets is determined according to accumulated error generated in the processing and installation of various processing parts, thereby eliminating the accumulated error caused by assembling a plurality of parts; and axial clearance achieves the optimal state, the main shaft and the counter shaft cannot generate axial float, the requirement of the processing precision of a matching surface can be reduced, and the processing difficulty and the scrap rate can be reduced, thereby greatly reducing the production cost, improving the quality of the positive-displacement pump, ensuring that the positive-displacement pump has stable output and small noise, prolonging the service life of the pump and improving the grade of the pump.

Description

The major and minor axle of displacement pump axial adjusting device

Technical field

The utility model relates to the add-on parts on a kind of major and minor axle that is installed in pump, particularly in order to guarantee output accuracy height, stable working, the major and minor axle of the displacement pump axial adjusting device that noise is little.

Background technique

Because of rotor pump have easy for installation, energy-efficient, carry steadily, can forward and reverse work carry the characteristics that contain solid particle and high thick material medium, be widely used in industries such as oil, chemical industry, food, papermaking, pharmacy.Especially displacement pump is the very high pump of a kind of required precision, entire pump is by the master, countershaft, main, pinion, double rotor, a left side, right bearing, component such as mechanical seal are assembled into, therefore the machining accuracy to each part of constituting it also requires very high, that have even at micron order, processing cost is improved greatly, in assembly process, also can produce cumulative error because part is more in addition, finally just cause axial clearance excessive, too small problem, if excesssive gap will produce axial float, if the too small axle phenomenon that is stuck that can take place again in gap, size how to adjust axial clearance has been the problem that need solve immediately.

Summary of the invention

Technical problem to be solved in the utility model is: the major and minor axle of a kind of displacement pump axial adjusting device is provided, be installed on the major and minor axle, make the axial clearance regulation of major and minor axle to the optimum state, solve the accumulated error that many component assemblings back produces, thereby guarantee that displacement pump has high-precision output, increase the service life, make also that complete machine easily assembles, easily processing, processing cost reduces greatly.

The technical scheme in the invention for solving the above technical problem is: the major and minor axle of displacement pump axial adjusting device is made of pad, described pad is installed in the fore bearing place of major and minor axle, and pad is close on the inner ring or cycle surface of described major and minor axle fore bearing.

Compared with prior art, advantage of the present utility model is: former major and minor axle is gone up does not have this regulating device, and adding needs design the machining accuracy of each component part very high man-hour, so difficulty of processing is big, reject rate is higher, inefficiency, processing cost height.Now install this pad additional, 1, it is simple in structure, easily make, and be installed in the master, the fore bearing shelves place of countershaft, this is that stressed larger part and bearing guard machining accuracy are higher, can guarantee quality of fit with pad, if be installed in rotor end-face, then maintenance and renewal part are difficult, the thickness of pad is decided in the gap that can produce according to the cumulative error of each processing accessories during assembling, and the big pad in gap is thick, and the gap minipad is thin, promptly remedy and regulate the master with pad, the cumulative error that countershaft produces in processing and installation process, make axial clearance reach the optimum state, thereby can relax requirement, greatly reduce cost of production each part fit tolerance precision; 2, axially easy to adjust, be convenient to maintenance, transposing; 3, because of major and minor axle axial clearance can be adjusted to the optimum state, thereby the precision of displacement pump is improved greatly, reduced the rotor pump noise.

Description of drawings

Fig. 1, structural representation of the present utility model.

Fig. 2, user mode reference drawing of the present utility model (being close to) with major and minor axle fore bearing inner ring.

Fig. 3, the utility model alternative plan structural representation.

Fig. 4, alternative plan user mode reference drawing (being close to) with major and minor axle fore bearing outer ring.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is further described.

Major and

minor pad

11,9,10,1 is installed in fore bearing 8,3 places of major and

minor axle

5,4, as Fig. 1, shown in Figure 3 by the different big or small ring packing rings that metallic material is made into.

One end face of major and

minor pad

9,1 is close to the fore bearing shaft shoulder face of major and

minor axle

5,4, and an end face of fore bearing 8,3 inner rings of major and minor axle is close in the other end, as shown in Figure 2.

The thickness of major and

minor pad

11,9,10,1 is matched by the size of major and minor axle axial clearance, and the big pad of axial clearance is thick, gap minipad thin thickness.

One end face of major and

minor pad

11,10 is close to the fore bearing 8,3 of major and

minor axle

5,4 and the fitting surface of casing 2, and end face is close to an end face of fore bearing 8,3 outer rings of major and minor axle in addition, as shown in Figure 4.

During use, the power input drives main shaft 5 and rotates, driving the pinion 7 that is meshed on the countershaft 4 through the master gear on the main shaft 6 rotates, driving countershaft 4 rotates, thereby drive the double rotor rotation, with the continuous rotation of rotor, medium is constantly sucked and discharges displacement pump and carry out proper functioning, as Fig. 2, shown in Figure 4.

Claims

1, the major and minor axle of a kind of displacement pump axial adjusting device, it is characterized in that constituting by pad, described pad is installed in major and minor axle (5), the fore bearing (8) of (4), (3) are located, and pad is close on the inner ring or cycle surface of fore bearing (8), (3) of major and minor axle (5), (4).

2, the major and minor axle of displacement pump according to claim 1 axial adjusting device, it is characterized in that described pad is major and minor pad (9), (1), one end face is close to the shaft shoulder face of major and minor axle (5), (4), and the fore bearing (8) of major and minor axle, an end face of (3) inner ring are close in the other end.

3, the major and minor axle of displacement pump according to claim 1 axial adjusting device, it is characterized in that described pad is major and minor pad (11), (10), one end face is close to the fitting surface of major and minor axle (5), (4) fore bearing (8), (3) and casing (2), and end face is close to the fore bearing (8) of major and minor axle, an end face of (3) outer ring in addition.

4, the major and minor axle of displacement pump according to claim 1 axial adjusting device, the thickness that it is characterized in that major and minor pad (11), (9), (10), (1) is prepared by the size of major and minor axle (5), (4) axial clearance, the big pad of axial clearance is thick, gap minipad thin thickness.