CN2813986Y

CN2813986Y - Shaft connecting structure for long-shaft liquid low chemical pump

Info

Publication number: CN2813986Y
Application number: CN 200520044296
Authority: CN
Inventors: 刘剑军; 虞召存; 吴贤芳
Original assignee: Shanghai Kaiquan Pump Group Co Ltd
Current assignee: Shanghai Kaiquan Pump Group Co Ltd
Priority date: 2005-08-16
Filing date: 2005-08-16
Publication date: 2006-09-06
Anticipated expiration: 2015-08-16

Abstract

The utility model relates to a shaft connecting structure for a long-shaft liquid low chemical pump, which comprises a first shaft, a second shaft, a division half ring, a clamping coupling, bolts and keys, wherein an annular slot is respectively arranged at the shaft extension ends of the first shaft and the second shaft, and key slots are arranged on the shaft extension surfaces; the division half ring is clamped in the annular slots at the shaft extension ends of the first shaft and the second shaft to cause the two shafts to be connected in the shaft direction; the key slots are arranged in inner holes of the clamping coupling, connecting holes are arranged at both sides of the clamping coupling, the clamping bolts are arranged in the connecting holes; the keys are arranged in the key slots at the shaft extension end and in the key slots of the clamping coupling. The shaft connecting structure for a long-shaft liquid low chemical pump of the utility model overcomes the defects of the existing various shaft connecting structures, and the utility model has the advantages of simple structure, easy manufacturing parts, convenient assembly, convenient disassembly, high shafting concentricity, good rigidity and reliable connection. The shaft connecting structure of the utility model can be applied to other pumps with similar structures besides the long-shaft liquid low chemical pump.

Description

Chemical pump connects axle construction under the major axis liquid

Technical field

The utility model relates to the major axis pump, the new axle construction that connects of chemical pump under particularly a kind of major axis liquid.

Background technique

Chemical pump is that a kind of its working portion is immersed in the vertical pump in the medium under the major axis liquid, and length can reach 6～7 meters under its maximum liquid.In general, when length under the liquid surpasses 2 meters, often will many short axles in the mode that connects axle, couple together by suitable mode, with degree of depth requirement under the liquid that satisfies length.According to the principle that connects axle, should consider simple in structurely, parts machining process is good, and mounting or dismounting are convenient, consider again to guarantee how to greatest extent that axle is that concentricity and axle are rigidity.In addition, also want special concern to connect the reliability of axle construction.

The common axle construction that connects of chemical pump has following several under the major axis liquid at present:

One, screw thread socket axle (referring to Fig. 1)

It is very simple that this connects axle construction, and part processing is easy, and the concentricity and the rigidity of axle system depend on the threaded interior hole machining accuracy and the thread bush structural design of thread bush 13.Must consider during design pump turn to and the thread bush thread rotary orientation between relation.The disadvantage of this structure is that pump can not reverse, and lower shaft 12 easily gets loose during counter-rotating, causes axle to be the rigidity variation and axial dimension is changed, and causes pump vibration or friction.Number in the figure 11 is to go up axle, the 14th, circlip.

Two, the fixed cover stud connects axle (referring to Fig. 2)

This connects axle construction with key 23 transmitting torques, connects diaxon 21,22 up and down with stud 24, and fixed cover 25 and two spindle noses are Spielpassung.This is relatively simple for structure, and part processing is easy, and mounting or dismounting are also convenient, but axle is that concentricity depends on diaxon head thread hole machining accuracy, and axle is that rigidity is relatively poor.Number in the figure 26 is bolts, the 27th, and nut, the 28th, circlip.

Three, fixed cover divides semi-ring to connect axle (referring to Fig. 3)

This connects axle construction with key 33,34 transmitting torques, does axially to connect with a pair of minute semi-ring 35, and fixed cover 36 and two spindle noses 31,32 are Spielpassung.This is relatively simple for structure, and part processing is easy, and mounting or dismounting are convenient, and axle is that concentricity guarantees by the fit tolerance between fixed cover and two spindle noses fully, and axle is that rigidity is relatively poor.Number in the figure 37 is circlips.

Four, taper sheath squeezes crimp shaft (referring to Fig. 4)

This connects axle construction with key 43,44 transmitting torques, connects diaxon 41,42 with a pair of branch half inner conical drogue 45, and diaxon is made axially locating.External conical sleeve 46 extruding inner conical drogues when bolt is tightened, make inner conical drogue to the diameter of axle to the location.It is reliable that this structure connects axle, connects good rigidly, but structure is complicated, and size is bigger, part processing is required very high, concentricity be subjected to inner conical drogue two stomidiums processing technology difference and be affected.Number in the figure 47 is double-screw bolts.

Summary of the invention

Task of the present utility model provides the axle construction that connects of chemical pump under a kind of improved major axis liquid, and it has solved, and existing to connect the axle that has in the axle construction be that rigidity is relatively poor, and the complex structure that has, size be big, part processing is required problem such as height.

The technical solution of the utility model is as follows:

Under a kind of major axis liquid chemical pump connect axle construction, it comprises first and second, divides semi-ring, clamping coupling, bolt and key, described first and second shaft extension end is respectively equipped with circular groove, the shaft extension surface Machining has keyway; Described minute semi-ring be clipped on first with second shaft extension end circular groove in two axles axially are connected; The endoporus of described clamping coupling is provided with keyway, and two sides of clamping coupling are respectively equipped with connecting hole, and clamping bolt is installed in connecting hole; Described key is installed in shaft extension keyway and the clamping coupling keyway.

Under the major axis liquid of the present utility model chemical pump connect axle construction, overcome the above-mentioned existing multiple drawback that connects axle construction, structurally more simple, part processing is easy, mounting or dismounting are convenient, axle is the concentricity height, good rigidly connects reliable.

Of the present utility modelly connect axle construction and under being applied to major axis liquid, the chemical pump, also can be applicable to the pump of other similar structure.

Description of drawings

Fig. 1 is a chemical pump screw thread socket axle construction schematic representation under the major axis liquid of prior art.

Fig. 2 is that chemical pump fixed cover stud connects the axle construction schematic representation under the major axis liquid of prior art.

Fig. 3 is that the chemical pump fixed cover divides semi-ring to connect the axle construction schematic representation under the major axis liquid of prior art.

Fig. 4 is that the extruding of chemical pump taper sheath connects the axle construction schematic representation under the major axis liquid of prior art.

Fig. 5 be under a kind of major axis liquid of the present utility model chemical pump connect the axle construction schematic representation.

Fig. 6 is the M-M sectional view among Fig. 5.

Fig. 7 is that Fig. 5 connects the branch semi-loop schematic representation in the axle construction.

Fig. 8 is by left view shown in Figure 7.

Fig. 9 is that Fig. 5 connects the clamping coupling structural representation in the axle construction.

Figure 10 is the N-N sectional view among Fig. 9.

Embodiment

Referring to Fig. 5 and Fig. 6, the axle construction that connects of chemical pump is made up of first 51, second 52, a pair of minute part such as semi-ring 53, clamping coupling 54, clamping bolt 55, key 56 and lock washer 57 under a kind of major axis liquid of the present utility model.First 51 and second 52 shaft extension end respectively is processed with circular groove, and the shaft extension surface Machining has keyway.

Referring to Fig. 7 and Fig. 8, a pair of minute semi-ring 53 is clipped in first 51 and second 52 the shaft extension end circular groove, makes it to match, and thus two

axles

51,52 axially coupled together.

Referring to Fig. 9 and Figure 10, the endoporus of clamping coupling 54 is provided with keyway.Two sides of clamping coupling 54 are respectively equipped with connecting hole, and clamping bolt 55 is installed in connecting hole.Connecting hole is positioned at symmetry two sides of clamping coupling 54, is respectively unthreaded hole and tapped hole.In two sides of clamping coupling 54 symmetry eight clamping bolts 55 are installed, first 51, second 52 and folder shell-type coupling 54 can be coupled together tightly, thereby guarantee first 51 and second 52 concentricity and rigidity.

As shown in Figure 5, key 56 is installed in shaft extension keyway and clamping coupling 54 keyways.As shown in Figure 6, lock washer 57 is housed all on clamping bolt 55, can get loose to guarantee pump clamping bolt 5 in operation process.

The utility model when assembling, at first a pair of minute semi-ring put into first and second shaft extension end circular groove, first and second is coupled together; Secondly be processed with the clamping coupling that keyway, symmetrical two sides have unthreaded hole and tapped hole by means of endoporus, two axles are rigidly connected, and guarantee that the key on first and second shaft extension matches with keyway on the clamping coupling; Then clamping bolt is passed from clamping coupling unthreaded hole side, be screwed in the corresponding tapped hole and fully tighten, make the clamping coupling endoporus produce resiliently deformable and combine closely with first and second, guarantee two shaft concentricities and coupling stiffness and transmitting torque.In assembly process, eight clamping bolts are answered symmetry layout and stressed even, and are even to guarantee slit, clamping coupling both sides.

Claims

Under the major axis liquid chemical pump connect axle construction, it comprises first and second, divides semi-ring, clamping coupling, bolt and key is characterized in that, described first and second shaft extension end is respectively equipped with circular groove, the shaft extension surface Machining has keyway; Described minute semi-ring be clipped on first with second shaft extension end circular groove in two axles axially are connected; The endoporus of described clamping coupling is provided with keyway, and two sides of clamping coupling are respectively equipped with connecting hole, and clamping bolt is installed in connecting hole; Described key is installed in shaft extension keyway and the clamping coupling keyway.
2. under the major axis liquid according to claim 1 chemical pump connect axle construction, it is characterized in that symmetry two sides that described connecting hole is positioned at clamping coupling are respectively unthreaded hole and tapped hole.
3. under the major axis liquid according to claim 1 chemical pump connect axle construction, it is characterized in that the two sides symmetry of described clamping coupling is installed eight clamping bolts.
4. under the major axis liquid according to claim 1 chemical pump connect axle construction, it is characterized in that, on the described clamping bolt lock washer is housed.