Shafting torsional vibration testing device of horizontal multi-stage pump unit

Abstract

The utility model discloses a shaft system torsional vibration testing device for a horizontal multi-stage pump unit, relates to the technical field of detection devices, and particularly relates to a multi-shaft horizontal multi-stage pump unit comprising a gearbox and a plurality of coupling structures. A to-be-tested piece shaft system is horizontally assembled at the lower part of a pump static piece; the gear disc is mounted outside the shaft system; the L-shaped fixed support plate is fixedly arranged on the pump static part through a screw; the gear disc is mounted outside the shaft system in a hot assembly interference manner; the number of teeth of the gear disc is 120, and cutting tooth pitches are evenly distributed. The L-shaped fixed support plate is provided with a long notch used for assembling a torsional vibration test sensor. The torsional vibration test sensor is a Hall sensor and is vertically installed on the L-shaped fixing support plate, and a gap is reserved between the sensing end of the torsional vibration test sensor and the outer teeth of the gear disc. According to the technical scheme of the utility model, the problems of how to fix a gear on a high-speed rotating shaft system and how to fix a sensor in a shaft system torsional vibration test in the prior art are solved.

Description

Technical Field

[0001] The torsional vibration test device for the shafting of the horizontal multi-stage pump unit of the present utility model relates to the technical field of detection devices, and particularly relates to a multi-shaft horizontal multi-stage pump unit with a gearbox and multiple coupling structures. Background Art

[0002] The torsional dynamic characteristics of the shafting of a horizontal multi-stage pump unit are the key characteristics to ensure the reliability of the equipment. If torsional resonance occurs in the shafting of the pump unit, it may cause problems such as loose motor coils, damage to connecting parts (couplings, gearboxes, etc.), and fatigue failure of the shaft.

[0003] Testing the torsional natural frequency of the shafting of the unit is an essential and crucial step in identifying the risk of torsional resonance of the shafting and ensuring the reliability of the equipment. Since large high-power high-speed centrifugal pump units are commonly used in high-temperature and high-risk working conditions and have a compact structure, the commonly used encoder testing method for torsional testing cannot be adopted. The non-contact shafting torsional vibration testing method (gear + sensor structure) can be used to achieve torsional vibration testing of the shafting of large high-power high-speed centrifugal pump units. However, how to fix the gear on the high-speed rotating shafting and how to fix the sensor have become the difficulties in shafting torsional vibration testing.

[0004] In view of the problems existing in the above-mentioned prior art, it is very necessary to research and design a new torsional vibration test device for the shafting of a horizontal multi-stage pump unit to overcome the problems existing in the prior art. Summary of the Invention

[0005] In view of the technical problems of how to fix the gear on the high-speed rotating shafting and how to fix the sensor, which have become the difficulties in shafting torsional vibration testing proposed in the above-mentioned prior art, a torsional vibration test device for the shafting of a horizontal multi-stage pump unit is provided. The present utility model mainly solves the problems of gear installation and sensor fixation faced by large high-power high-speed centrifugal pump units during torsional vibration testing by establishing a gear disk on the shafting that cooperates with the test sensor.

[0006] The technical means adopted by the present utility model are as follows:

[0007] A torsional vibration test device for the shafting of a horizontal multi-stage pump unit includes a pump stationary part arranged vertically;

[0008] Furthermore, the torsional vibration test device for the shafting of the horizontal multi-stage pump unit further includes: a gear disk, an L-shaped fixing support plate, and a torsional vibration test sensor;

[0009] Furthermore, the lower part of the pump stationary part is horizontally assembled with the shafting to be tested;

[0010] Furthermore, the gear disk is installed outside the shafting;

[0011] Further, the L-shaped fixed support plate is fixedly installed on the pump stationary part by screws;

[0012] Further, the torsional vibration test sensor is fixedly installed on the L-shaped fixed support plate by a nut, facing the tooth top surface of the gear disk and pointing to the center of the gear disk.

[0013] Further, the gear disk is installed on the outside of the shafting by thermal assembly interference fit;

[0014] Further, the number of teeth of the gear disk is 120, and the tooth pitches are evenly distributed.

[0015] Further, the L-shaped fixed support plate is provided with a notch for assembling the torsional vibration test sensor.

[0016] Further, the notch is a long notch along the length direction of the horizontal cross plate of the L-shaped fixed support plate. When the installation position of the gear disk changes, the torsional vibration test sensor can move in this straight notch to ensure that the sensor faces the gear disk.

[0017] Further, the torsional vibration test sensor is vertically installed on the L-shaped fixed support plate, and there is a gap between its sensing end and the external teeth of the gear disk.

[0018] Further, the torsional vibration test sensor is a Hall sensor.

[0019] Compared with the prior art, the present utility model has the following advantages:

[0020] 1. For the shafting torsional vibration test device of the horizontal multi-stage pump unit provided by the present utility model, the gear disk is installed on the outside of the shafting by thermal assembly interference fit, with a simple structure, saving space, and no need to process other positioning devices on the shafting;

[0021] 2. For the shafting torsional vibration test device of the horizontal multi-stage pump unit provided by the present utility model, the L-shaped fixed support plate is provided with a straight notch, and the sensor can move in the straight notch and position the sensor according to the position of the gear disk, improving the installation accuracy of the sensor.

[0022] In summary, applying the technical solution of the present utility model solves the problems in the prior art of how to fix the gear on the high-speed rotating shafting and how to fix the sensor, which makes the shafting torsional vibration test difficult, and realizes the shafting torsional vibration test of the horizontal multi-stage pump unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 This is a schematic structural diagram of the present utility model;

[0025] Figure 2 This is a three-dimensional view of the L-shaped fixing support plate of the present utility model.

[0026] In the figure: 1. Gear disk 2. L-shaped fixing support plate 3. Screw 4. Nut 5. Torsional vibration test sensor 6. Shafting 7. Pump stationary part. Specific implementation manners

[0027] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The following will describe the present utility model in detail with reference to the drawings and in combination with the embodiments.

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part rather than all of the embodiments of the present utility model. The description of at least one exemplary embodiment below is actually only illustrative and in no way restrictive of the present utility model and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners of the present utility model. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of the described features, steps, operations, devices, components and / or their combinations.

[0030] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present utility model. At the same time, it should be clear that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in accordance with the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc. are usually based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description. Without contrary instructions, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the protection scope of the present utility model: The orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0032] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above-mentioned", etc. can be used here to describe the spatial positional relationships between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0033] In addition, it should be noted that the use of words such as "first", "second", etc. to limit the components is only for the convenience of differentiating the corresponding components. Without otherwise stating, the above words have no special meaning, and thus, they should not be construed as limiting the protection scope of the present utility model.

[0034] Such asFigure 1 As shown in the figure, the utility model provides a torsional vibration test device for the shafting of a horizontal multi-stage pump unit, which includes a vertically arranged pump stationary part 7; the torsional vibration test device for the shafting of the horizontal multi-stage pump unit further includes: a gear disk 1, an L-shaped fixing support plate 2 and a torsional vibration test sensor 5; the lower part of the pump stationary part 7 is horizontally assembled with the shafting 6 to be tested; the gear disk 1 is installed outside the shafting 6; the L-shaped fixing support plate 2 is fixedly installed on the pump stationary part 7 by screws 3; the torsional vibration test sensor 5 is fixedly installed on the L-shaped fixing support plate 2 by nuts 4, facing the tooth top surface of the gear disk 1 and pointing to the center of the gear disk 1.

[0035] The gear disk 1 is installed outside the shafting 6 by hot assembly interference fit; the number of teeth of the gear disk 1 is 120, and the tooth pitches are evenly distributed.

[0036] The L-shaped fixing support plate 2 is provided with a notch for assembling the torsional vibration test sensor 5.

[0037] The notch is a long notch along the length direction of the horizontal cross plate of the L-shaped fixing support plate 2. When the installation position of the gear disk 1 changes, the torsional vibration test sensor 5 can move in this straight notch to ensure that the sensor faces the gear disk.

[0038] The torsional vibration test sensor 5 is vertically installed on the L-shaped fixing support plate 2, and there is a gap between its sensing end and the external teeth of the gear disk 1.

[0039] The torsional vibration test sensor 5 is a Hall sensor.

[0040] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A torsional vibration testing device for the shafting of a horizontal multi-stage pump unit, comprising a pump stationary member (7) arranged vertically; characterized in that: The torsional vibration testing device for the shafting of the horizontal multi-stage pump unit further comprises: a gear disk (1), an L-shaped fixing support plate (2) and a torsional vibration testing sensor (5); The lower part of the pump stationary member (7) is horizontally assembled with a shafting (6) to be tested; The gear disk (1) is installed outside the shafting (6); The L-shaped fixing support plate (2) is fixedly installed on the pump stationary member (7) by screws (3); The torsional vibration testing sensor (5) is fixedly installed on the L-shaped fixing support plate (2) by nuts (4), facing the tooth top surface of the gear disk (1) and pointing to the center of the gear disk (1).

2. The torsional vibration testing device for the shafting of the horizontal multi-stage pump unit according to claim 1, characterized in that: The gear disk (1) is installed outside the shafting (6) by thermal assembly with interference; The gear disk (1) has 120 teeth, and the tooth pitches are evenly distributed.

3. The torsional vibration testing device for the shafting of the horizontal multi-stage pump unit according to claim 1, characterized in that: The L-shaped fixing support plate (2) is provided with a notch for assembling the torsional vibration testing sensor (5).

4. The torsional vibration testing device for the shafting of the horizontal multi-stage pump unit according to claim 3, characterized in that: The notch is a long notch along the length direction of the horizontal cross plate of the L-shaped fixing support plate (2). When the installation position of the gear disk (1) changes, the torsional vibration testing sensor (5) can move in this notch to ensure that the sensor faces the gear disk.

5. The torsional vibration testing device for the shafting of the horizontal multi-stage pump unit according to claim 1, characterized in that: The torsional vibration testing sensor (5) is vertically installed on the L-shaped fixing support plate (2), and a gap is reserved between its sensing end and the external teeth of the gear disk (1).

6. The torsional vibration testing device for the shafting of the horizontal multi-stage pump unit according to claim 1, characterized in that: The torsional vibration testing sensor (5) is a Hall sensor.

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