Impeller bushing and mandrel torque easy-debugging measuring device

Abstract

The utility model discloses an impeller bushing and mandrel torque easy-debugging measuring device, the center of an impeller is provided with an impeller hole, the impeller hole is internally provided with a bushing, the inner hole of the bushing is provided with a mandrel, and the mandrel is provided with an impeller shaft. Comprising a lower shell, an upper shell which correspondingly covers the lower shell, and a plurality of limiting pieces which are arranged on the circumferential side wall of the lower shell and extend and retract to penetrate into an inner cavity of the lower shell; an inner cavity for containing the impeller is formed in the lower shell, a center hole aligned with an impeller hole is formed in the upper shell, the mandrel penetrates through the center hole, the end, exposed out of the upper shell, of the mandrel is connected with a torque wrench coupler, and the limiting piece stretches and retracts in the radial direction to be located between adjacent blades of the impeller. According to the utility model, the torque data of the impeller bushing and the mandrel can be tested more conveniently, and the testing efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of measurement, and in particular relates to an easy-to-adjust measuring device for an impeller bushing and a core shaft torque. Background Art

[0002] Torque testing of the impeller bushing and mandrel is an important step in evaluating the performance and stability of both components under torque loads. During the test, the torque carrying capacity of the impeller bushing can be evaluated by measuring its response under gradually increasing torque loads, and whether there is over-torque or fracture.

[0003] The existing patent number is CN202121880526.5, which discloses an impeller core shaft torque test device, including a test bench, a plurality of T-shaped positioning rods arranged on the top of the test bench and sliding radially and centripetally, and a plastic impeller arranged on the top of the test bench and plugged with the upper part of the T-shaped positioning rod. The above-mentioned T-shaped positioning rod corresponds to the drainage hole of the plastic impeller. Therefore, multiple T-shaped positioning rods need to be adjusted to the same circumferential position to facilitate alignment with the drainage hole. The adjustment process requires judging the position of the drainage hole. There are situations where the observation remains unchanged and the T-shaped positioning rod is adjusted multiple times. Utility Model Content

[0004] The purpose of the utility model is to solve the above technical problems and provide an easy-to-adjust measuring device for the torque of the impeller bushing and the core shaft, so as to more conveniently test the torque data of the impeller bushing and the core shaft and improve the efficiency of the test. In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0005] An easy-to-adjust measuring device for the torque of an impeller bushing and a core shaft, wherein an impeller hole is arranged at the center of the impeller, a bushing is installed in the impeller hole, a core shaft is arranged in the inner hole of the bushing, and the device comprises a lower shell, an upper shell arranged to cover the lower shell, and a plurality of limit members arranged on the circumferential side wall of the lower shell and telescopically extending through the inner cavity thereof; an inner cavity for accommodating the impeller is arranged in the lower shell, a center hole aligned with the impeller hole is arranged in the upper shell, the core shaft is arranged to pass through the center hole, one end of the core shaft exposed outside the upper shell is connected to a torque wrench connector, and the limit member is radially telescopically positioned between adjacent blades of the impeller.

[0006] Specifically, the top circumference of the lower shell corresponds to the upper shell for covering and limiting.

[0007] Specifically, the center hole and the core shaft are clearance-matched.

[0008] Specifically, a positioning block for positioning is radially arranged at the bottom of the lower shell.

[0009] Specifically, a plurality of threaded holes are provided on the circumferential side wall of the lower shell, and the limiting member is threadably connected to the threaded holes.

[0010] Compared with the prior art, the beneficial effects of the impeller bushing and core shaft torque easy-to-adjust measuring device of the utility model are mainly reflected in:

[0011] By arranging the upper shell and the lower shell to cooperate, the impeller is positioned in the inner cavity of the lower shell, the core shaft is located at the center of the upper shell, and the limiter can be accurately extended to the position between adjacent blades; the positioning method of the limiter is simpler and more efficient, which improves the efficiency of the torque test; it has strong versatility and is suitable for positioning tests of impellers of different diameters; the limiter is convenient for clamping and positioning the impeller, and the torque test data is accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0013] Figure 2 is a schematic cross-sectional structural diagram of this embodiment;

[0014] The numbers in the figure represent:

[0015] 1 impeller, 11 bushing, 12 core shaft, 13 blades, 2 lower housing, 21 limiter, 22 threaded hole, 3 upper housing, 31 center hole, 4 torque wrench connector, 5 positioning block. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present utility model are clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0017] Example:

[0018] Reference Figure 1-2 As shown, the product to be tested in this embodiment is an impeller 1, the center of the impeller 1 is provided with an impeller hole, a bushing 11 is installed in the impeller hole, and a core shaft 12 is provided in the inner hole of the bushing 11. After the core shaft 12 and the bushing 11 are assembled, a torque test needs to be performed to determine whether the assembly of the core shaft 12 and the bushing 11 meets the requirements.

[0019] The impeller bushing and core shaft torque easy-to-adjust measuring device comprises a lower shell 2, an upper shell 3 which is arranged to cover the lower shell 2, and a plurality of limit members 21 which are arranged on the circumferential side wall of the lower shell 2 and extend and penetrate into the inner cavity thereof; the lower shell 2 is provided with an inner cavity for accommodating the impeller 1, the upper shell 3 is provided with a center hole 31 which is aligned with the impeller hole, the core shaft 12 is provided through the center hole 31, one end of the core shaft 12 which is exposed outside the upper shell 3 is connected with a torque wrench connector 4, and the limit members 21 are extended and positioned radially between adjacent blades 13 of the impeller 1.

[0020] In this embodiment, the lower housing 2 is a cylindrical barrel structure, and the top of the lower housing 2 is circumferentially corresponding to the upper housing 3 to cover and limit, so as to keep the upper housing 3 and the lower housing 2 stably connected. At the same time, the core shaft 12 is passed through the center hole of the upper housing 3 to ensure that the core shaft 12 is in the center positioning position, so that the plurality of limit members 21 can accurately extend into the space between the adjacent blades 13 of the impeller 1. The center hole and the core shaft 12 are in clearance fit, and the torque test of the core shaft 12 is not hindered.

[0021] A positioning block 5 for positioning is radially arranged at the bottom of the lower housing 2. The positioning block 5 is positioned on a clamping device so that the lower housing 2 does not deflect and move. The clamping device is a conventional structure and is not limited to a bench vise.

[0022] The circumferential side wall of the lower shell 2 is provided with a plurality of threaded holes 22, and the stoppers 21 are threadedly connected with the threaded holes 22, and the position of the stoppers 21 extending into the inner cavity of the lower shell 2 is adjusted to ensure that the stoppers 21 can be accurately positioned at the spatial position between adjacent blades 13. The adjustment method of the plurality of stoppers 21 is more convenient than the traditional method.

[0023] When this embodiment is applied, a torque wrench (not shown in the figure) is externally provided to the torque wrench connector 4. By rotating the torque wrench, the torque data between the core shaft 12 and the bushing 11 can be accurately measured, thereby judging whether the impeller bushing 11 and the core shaft 12 are assembled in place.

[0024] In this embodiment, the upper shell 3 is matched with the lower shell 2 so that the impeller 1 is positioned in the inner cavity of the lower shell 2, the core shaft 12 is located at the center of the upper shell 3, and the limit member 21 can be accurately extended to the position between adjacent blades 13; the positioning method of the limit member 21 is simpler and more efficient, which improves the efficiency of the torque test; it has strong versatility and is suitable for positioning tests of impellers 1 of different diameters; the limit member 21 is convenient for clamping and positioning the impeller 11, and the torque test data is accurate.

[0025] In the description of this specification, the term "specific embodiment" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0026] Although the implementation methods disclosed in the utility model are as above, the above contents are only implementation methods adopted to facilitate the understanding of the utility model, and are not used to limit the utility model. Any technician in the field to which the utility model belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the utility model, but the scope of patent protection of the utility model shall still be based on the scope defined in the attached claims.

Claims

1. An easy-to-adjust torque measuring device for an impeller bushing and a core shaft, wherein an impeller hole is arranged at the center of the impeller, a bushing is installed in the impeller hole, and a core shaft is arranged in the inner hole of the bushing, characterized in that: It includes a lower shell, an upper shell which is correspondingly covered with the lower shell, and a plurality of limit members which are arranged on the circumferential side wall of the lower shell and extend and penetrate into its inner cavity; the lower shell is provided with an inner cavity for accommodating an impeller, the upper shell is provided with a center hole which is aligned with the impeller hole, the core shaft is provided through the center hole, one end of the core shaft which is exposed outside the upper shell is connected to a torque wrench connector, and the limit members are extended and positioned radially between adjacent blades of the impeller.

2. The impeller bushing and mandrel torque easy-to-adjust measuring device according to claim 1 is characterized in that: The top circumference of the lower shell corresponds to the upper shell and covers and limits the position.

3. The impeller bushing and core shaft torque easy-to-adjust measuring device according to claim 1 is characterized in that: The center hole and the core shaft are clearance-matched.

4. The impeller bushing and mandrel torque easy-to-adjust measuring device according to claim 1 is characterized in that: A positioning block for positioning is radially arranged at the bottom of the lower shell.

5. The impeller bushing and mandrel torque easy-to-adjust measuring device according to claim 1 is characterized in that: The circumferential side wall of the lower shell is provided with a plurality of threaded holes, and the limiting member is threadably connected with the threaded holes.

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