Turbine rotor structure

Abstract

The utility model discloses a turbine rotor structure which comprises a front bearing, an impeller, a rear bearing and a plurality of pins, the rear bearing is installed at the right end of the impeller, the front bearing is installed at the left end of the impeller, the rear bearing and the impeller are fixed through the plurality of groups of pins, and the front bearing and the impeller are fixed through the plurality of groups of pins. A concave-convex step structure is arranged on the outer side of the right end of the front bearing, and a concave-convex step structure is arranged on the inner side of the left end of the rear bearing. Mounting inner holes are formed in the left side and the right side of the impeller, and two groups of mounting holes which are annularly distributed at equal intervals are formed in the mounting inner holes. According to the turbine rotor structure, the technical problem that when a turbine rotor is used in a high-temperature or low-temperature environment, a bearing is loosened from the impeller due to thermal expansion and cold contraction is solved; therefore, the turbine rotor can stably rotate in high-temperature or low-temperature fluid, so that the measurement precision of the instrument is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of turbine flow sensors, and particularly relates to a turbine rotor structure. Background Technique

[0002] The working principle of the turbine flow sensor is that when the fluid flows through the sensor, the impeller rotates in a fixed functional relationship with the flow velocity, and the rotation speed of the impeller is detected by using the principle of electromagnetic induction to obtain the flow rate.

[0003] The existing traditional liquid turbine flow sensor turbine rotor has the following defects:

[0004] The existing traditional liquid turbine flow sensor turbine rotor adopts a sliding bearing structure. Under special working conditions such as high temperature or low temperature, the materials of the bearing and the impeller of the turbine rotor are different, so the thermal expansion and contraction coefficients are also different. Often due to temperature changes, during the rotation of the impeller, the press fit between the bearing and the impeller gradually loosens, thus affecting the measurement accuracy of the entire turbine flow sensor. Therefore, a solution needs to be given. Content of the Utility Model

[0005] (I) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the utility model provides a turbine rotor structure to solve the problems put forward in the above background technique.

[0007] (II) Technical Solutions

[0008] To achieve the above object, the utility model is realized through the following technical solutions: A turbine rotor structure includes a front bearing, an impeller, a rear bearing and a plurality of pins. The rear bearing is installed at the right end of the impeller, the front bearing is installed at the left end of the impeller, and the rear bearing and the impeller, the front bearing and the impeller are fixed through a plurality of groups of pins respectively.

[0009] Preferably, an uneven step structure is provided on the outer side of the right end of the front bearing, and an uneven step structure is provided on the inner side of the left end of the rear bearing.

[0010] Preferably, installation inner holes are provided on both the left and right sides of the impeller, and two groups of installation holes are provided in the installation inner holes in an annular equidistant manner.

[0011] Preferably, the uneven step structures of the front bearing and the rear bearing are respectively clamped in a group of installation inner holes.

[0012] (III) Beneficial Effects

[0013] The utility model provides a turbine rotor structure. The following beneficial effects are achieved:

[0014] This kind of turbine rotor structure adopts front and rear bearings, and concave and convex card slot structures are designed corresponding to the inside and outside of the front and rear bearings. When the front and rear bearings are successively pressed into the impeller hole, they just fit snugly, and pins are symmetrically installed on the end faces of the front and rear bearings to pin the impeller and the bearings tightly. Thus, the technical problem that the bearings become loose from the impeller due to thermal expansion and contraction in high or low temperature usage environments is solved, enabling the turbine rotor to rotate smoothly in high or low temperature fluids, thereby ensuring the measurement accuracy of the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the whole of the present utility model;

[0016] Figure 2 It is a schematic structural diagram of the front bearing and the rear bearing of the present utility model;

[0017] Figure 3 It is a schematic structural diagram of the rear bearing of the present utility model.

[0018] In the figure, 1, front bearing; 2, impeller; 3, rear bearing; 4, pin; 5, concave and convex step structure; 6, installation inner hole; 7, installation hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1 - 3 , the embodiments of the present utility model provide a technical solution: a turbine rotor structure, including a front bearing 1, an impeller 2, a rear bearing 3 and a plurality of pins 4. The rear bearing 3 is installed at the right end of the impeller 2, the front bearing 1 is installed at the left end of the impeller 2, and both between the rear bearing 3 and the impeller 2 and between the front bearing 1 and the impeller 2 are fixed by a plurality of groups of pins 4.

[0021] An outer side of the right end of the front bearing 1 is provided with a concave and convex step structure 5, and an inner side of the left end of the rear bearing 3 is provided with a concave and convex step structure 5. The concave and convex step structures 5 of the front bearing 1 and the rear bearing 3 are for facilitating embedding into the impeller 2, so as to achieve the purpose of connection.

[0022] Further, installation inner holes 6 are opened on both the left and right sides of the impeller 2, and two groups of installation holes 7 distributed at equal intervals in a ring shape are opened in the installation inner holes 6. The installation inner holes 6 opened on both the left and right sides of the impeller 2 are for facilitating the embedding of the front bearing 1 and the rear bearing 3, so as to achieve the fixation of the front bearing 1 and the rear bearing 3.

[0023] Differently, the concave-convex step structures 5 of the front bearing 1 and the rear bearing 3 are respectively clamped in a group of installation inner holes 6. First, the rear bearing 3 is pressed into the right side of the inner hole of the impeller 2, and then the front bearing 1 is pressed into the left side of the inner hole of the impeller 2. Moreover, the concave-convex step provided on the outer side of the right end of the front bearing 1 is firmly clamped corresponding to the concave-convex step structure 5 provided on the inner side of the left end of the rear bearing 3. The pin 4 is symmetrically installed on the end faces of the front bearing 1 and the rear bearing 3 to tightly fasten the impeller 2 and the bearings, thus solving the technical problem that the bearings become loose from the impeller due to thermal expansion and contraction in high-temperature or low-temperature usage environments of the turbine rotor, enabling the turbine rotor to rotate smoothly in high-temperature or low-temperature fluids, and thus ensuring the measurement accuracy of the instrument.

[0024] Working principle: During operation, when high-temperature or low-temperature fluid flows through, due to the different materials of the impeller 2, the front bearing 1, and the rear bearing 3, their expansion coefficients are also different. When the impeller 2 starts to rotate at high speed, the front bearing 1 and the rear bearing 3 are firmly clamped to each other, and the end faces of the front bearing 1 and the rear bearing 3 are symmetrically installed by a number of pins 4 to tightly fasten the impeller 2 and the bearings, so that the impeller 2 and the bearings will not become loose due to thermal expansion and contraction.

[0025] For the 1. front bearing; 2. impeller; 3. rear bearing; 4. pin; 5. concave-convex step structure; 6. installation inner hole; 7. installation hole of the present utility model, the components are all common standard parts or parts known to those skilled in the art. Their structures and principles can all be learned by those skilled in the art through technical manuals or through conventional experimental methods. The problem solved by the present utility model is that the turbine rotors of existing traditional liquid turbine flow sensors all adopt sliding bearing structures. When measuring fluids under special working conditions such as high temperature or low temperature, the materials of the bearings and impellers of the turbine rotors are different, so their thermal expansion and contraction coefficients are also different. Often due to temperature changes, during the rotation of the impeller, the press fit between the bearing and the impeller gradually becomes loose, thus affecting the measurement accuracy of the entire turbine flow sensor. Through the mutual combination of the above components, the present utility model solves the technical problem that the bearings become loose from the impeller due to thermal expansion and contraction in high-temperature or low-temperature usage environments of the turbine rotor, enabling the turbine rotor to rotate smoothly in high-temperature or low-temperature fluids, and thus ensuring the measurement accuracy of the instrument.

[0026] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0027] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A turbine rotor structure, characterized in that: It includes a front bearing (1), an impeller (2), a rear bearing (3) and a number of pins (4). The rear bearing (3) is installed at the right end of the impeller (2), the front bearing (1) is installed at the left end of the impeller (2), and the rear bearing (3) and the impeller (2), as well as the front bearing (1) and the impeller (2), are fixed by a number of groups of pins (4). An uneven step structure (5) is provided on the outer side of the right end of the front bearing (1), and an uneven step structure (5) is provided on the inner side of the left end of the rear bearing (3). Installation inner holes (6) are provided on both the left and right sides of the impeller (2), and two groups of installation holes (7) distributed at equal intervals in a ring shape are provided in the installation inner holes (6). The uneven step structures (5) of the front bearing (1) and the rear bearing (3) are respectively clamped in a group of installation inner holes (6).

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