JPH0680316B2 - Rotor for rotary fluid pump - Google Patents

Description

TECHNICAL FIELD The present invention relates to the structure of a rotor for a rotary fluid pump, and more particularly to the structure of a hollow rotor.

[Prior Art] Rotary fluid pumps are widely used in many industrial fields, but since their rotors are originally solid structures, they are very heavy and therefore require a large amount of energy to move, resulting in lost energy. However, there were problems such as large size and difficulty in high speed rotation.

To deal with this problem, it is necessary to reduce the weight of the rotor by making it hollow. Conventionally, a hollow-structured rotor has been known, but a conventional hollow-type rotor is a method of bending the entire rotor body into a substantially cylindrical body having a hollow structure or a method of forming a hollow structure by casting. Alternatively, a solid rotor is first manufactured by forging, and then a hollow structure is formed by punching or the like.

[Problems to be Solved by the Invention] However, in the method of manufacturing the entire rotor body by bending the plate material, it is not possible to accurately process each part of the rotor body such as the vane groove into a predetermined shape only by bending the plate material. It is difficult, and it is difficult to make the thickness and shape uniform on the whole, and the thermal expansion of the entire rotor is not constant. Further, even in the method of processing after casting or forging, there is a problem that it is difficult to make the thickness of each part of the rotor uniform and, in many cases, the thickness cannot be significantly reduced, so that the effect of weight reduction does not increase that much. It was

An object of the present invention is to provide a structure of a rotor for a rotary fluid pump, which can be significantly reduced in weight, is relatively easy to process, and can be made uniform in shape as a whole.

[Means for Solving the Problems] To achieve this object, the rotor for a rotary fluid pump of the present invention comprises the following rotors.

A hollow rotor main body having a vane groove, a side plate joined to an axial end portion of the rotor main body, and a rotary shaft protruding from the side plate, in a rotor for a rotary fluid pump, wherein the rotor main body is A rotary type characterized by being constituted by joining a plurality of split members of the same shape, which extend in the axial direction of the rotor and are split in the circumferential direction of the rotor, at one of the joining positions of the outer circumference of the rotor and the bottom of the vane groove. Fluid pump rotor.

[Operation] In the rotor for a rotary fluid pump described above, the split member forming the rotor body has a relatively simple shape before joining. Therefore, bending of the individual divided members is easy and the processing accuracy is improved. Further, by using a plate-shaped material as the material of the dividing member, the plate thickness can be made uniform over the entire rotor body, and thermal deformation can be made uniform.

[Embodiment] A preferred embodiment of the rotor for a rotary fluid pump of the present invention will be described below with reference to the drawings.

1 and 2 show a rotor for a rotary fluid pump according to an embodiment of the present invention. As shown in FIG. 2, the rotor 1 includes a rotor body 3 having vane grooves 2,
Side plates 4 and 5 joined to both axial ends of the rotor body 3.
And rotating shafts 6 and 7 protruding from at least one of the side plates 4 and 5.

As shown in FIG. 1, the rotor main body 3 has split members 9 extending in the axial direction of the rotor and divided into a plurality of pieces in the circumferential direction of the rotor at the joining positions of the outer circumference of the rotor and the bottom of the vane groove. And are bonded to each other. In the embodiment shown in FIG. 1, the rotor body 3 is divided into four in the circumferential direction to form the dividing member 9, and the joint portion 10 between the dividing members 9 is the outer periphery 8 of the rotor body. In FIG. 1, the joining of the split members 9 is a butt joint,
As shown in FIG. 3, the end portions 12 of the adjacent division members 11 may be overlapped and joined, and in this configuration, the bonding strength is further improved.

In addition, as shown in FIG.
The dividing point of each of the dividing members 15 is the groove bottom portion 16 of the vane groove 2.
May be

Further, in each of the above-mentioned embodiments, the four-division structure having the same number as the number of vane grooves is used. However, as shown in FIG. 5, the joining portion 17 is the outer circumference of the rotor or the bottom of the vane groove, and the rotor is divided into two divided members. It may consist of 18.

As for the side plates 4 and 5, as shown in FIG.
The shape and size of 5 may be made equal to the shape and size of the inner circumference of the rotor body 3, and
As shown in the figure, the shape and size of the side plates 19, 20 may be made equal to the shape and size of the outer circumference of the rotor body 21.

When the side plate is joined to the rotor body by brazing or in-furnace welding, it is desirable to provide a hole (not shown) for communicating the hollow portion with the outside in the side plate, the shaft, or the rotor body. If this is not the case, the air in the hollow portion expands, and in some cases, the flux or the like burns, generating combustion gas, and good bonding cannot be performed. It is desirable that the hole communicating with the outside be closed later.

Further, as shown in FIG. 6, a core member 22 for connecting the both side plates 19, 20 may be provided in the hollow portion of the rotor body 21, and by arranging the core member 22 on the back surface side of the bottom of the vane groove, In particular, the groove bottom and the rotor body 21 can be reinforced.

In the example shown in FIGS. 2 and 6, the left and right rotary shafts 6, 7 and the rotary shafts 23, 24 are composed of separate members. However, as shown in FIG. Alternatively, the left and right shafts may be integrally formed of a single rotary shaft 25.
Further, as shown in FIG. 8, the diameter of the intermediate portion of the rotary shaft 26 may be reduced to reduce the weight.

Further, in the above-mentioned embodiment, the side plate and the rotary shaft are constituted as separate members before joining, but as shown in FIG.
At least one of 7, 28 may be an integrated member 30 formed integrally with the rotary shaft portion 29.

The operation of the above rotary fluid pump rotor will be described.

The rotor body 3 is formed into a hollow structure by joining the split members 9. The rotor shaft 3 is attached to the rotor body 3,
The side plates 4 and 5 having 7 are joined to complete the rotor 1.

In this hollow rotor 1, the split members 9 forming the rotor body 3 are separate members before joining,
Since it has a simple shape, each split member 9 can be easily and accurately bent. Moreover, by using a plate material having a uniform thickness as the material, the shapes of the respective parts after the completion of the rotor main body 3 are also made uniform, and the thermal deformation is also made uniform. Therefore, even if the hollow structure is relatively thin, the rotor 1 with sufficient accuracy can be obtained. Further, the processing is facilitated and the weight reduction is promoted. In addition, the rotor is shown in FIG. 1, FIG. 3, and FIG.
With the divided structure as shown in FIGS. 5 and 5, each divided member has the same shape, and the manufacturing is simplified.

[Advantages of the Invention] According to the present invention, the rotor can be easily processed, the weight can be reduced, the shape can be made uniform, and the thermal deformation can be made uniform. Moreover, energy saving and high-speed rotation can be promoted by weight reduction and uniformity, and accuracy can be improved and cost can be reduced by facilitating processing.

[Brief description of drawings]

1 is a side view of a rotor body of a rotor for a rotary fluid pump according to an embodiment of the present invention, FIG. 2 is a sectional view of the rotor taken along line II-II in FIG. 1, and FIG. FIG. 4 is a side view showing the structure of the rotor body, FIG. 4 is a side view showing the structure of another rotor body, FIG. 5 is a side view of the two-part split rotor body, and FIG. 6 is another side plate structure and core member. 7 is a sectional view of a rotor having a through shaft structure, FIG. 8 is a sectional view of a rotor showing a modification of FIG. 7, and FIG. 9 is a side plate and a rotary shaft. FIG. 4 is a cross-sectional view of a rotor having an integral structure. 1 ...... Rotor 2 ... Vane groove 3,14,21 ...... Rotor body 4,5,19,20 ...... Side plate 6,7,23,24,25,26 ...... Rotating shaft 8 ...... Rotor body outer periphery 9 , 11, 15, 18 ...... Split member 10, 12, 13, 17 ...... Joined part 16 ...... Groove bottom 22 ...... Core member 27, 28 ...... Side plate part 29 ...... Rotating shaft part 30 ...... Integrated member

Front page continuation (72) Inventor Kenji Shimizu 1784-1 Uegami-cho, Sano City, Tochigi Prefecture (56) References JP-A-59-215983 (JP, A)

Claims (1)

[Claims] 1. A rotor for a rotary fluid pump comprising a hollow rotor body having a vane groove, a side plate joined to an axial end of the rotor body, and a rotary shaft protruding from the side plate, The rotor body is configured by joining split members, which extend in the axial direction of the rotor and are divided into a plurality of pieces in the circumferential direction of the rotor, having the same shape to each other at one joining position of the rotor outer periphery and the vane groove bottom. Characteristic rotary fluid pump rotor.