Theoretical circle height measuring device for water pump impeller

Abstract

The utility model discloses a water pump impeller theoretical circle height measuring device which comprises a measuring ring and a guiding positioning ring, the guiding positioning ring is placed on the upper plane of a water pump body, a positioning inner hole in clearance fit with the outer diameter of an impeller is formed in the guiding positioning ring, and the measuring ring is sleeved with the guiding positioning ring. The outer diameter of the measuring ring is matched with the positioning inner hole, the inner diameter size of the measuring ring is consistent with the theoretical circle size of the impeller, the upper end face of the measuring ring is composed of a high-section step and a low-section step, and the height h1 from the high-section step to the bottom face of the measuring ring + the lower limit size Hmin of the theoretical circle height H = the height H2 of the positioning guide ring; and the height h2 from the low step to the bottom surface of the measuring ring and the upper limit size Hmax of the theoretical circle height H are equal to the height H2 of the positioning guide ring. Through the above mode, the device is accurate in hole positioning, reliable in measurement result, simple in structure, convenient and fast, capable of qualitatively judging whether the hole is qualified or not, fast in result obtaining and high in detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of engine circulating cooling water pump manufacturing technology, and in particular to a device for measuring the theoretical circle height of a water pump impeller. Background Technology

[0002] Engine circulating cooling water pump, such as Figure 1 As shown, the pump includes a pump body 1, a bearing 2, and an impeller 3. The bearing 2 is vertically mounted on the pump body 1, and the impeller 3 is mounted on the upper end of the bearing 2. After assembly, there is a theoretical circle (lower) on the inclined surface of the impeller 3. Figure 2 As shown (Φ48mm), the theoretical circle height H is the height from the intersection of the theoretical circle and the impeller cone 3 to the upper plane of the pump body 1. The theoretical circle height H has a height dimension requirement with tolerance (see below). Figure 2 The theoretical circle height H (12.4±0.5mm) is measured using coordinate measuring machine and CAD conversion, which is inefficient and has high labor costs.

[0003] Chinese patent CN202121920850.5 discloses a rapid measurement structure for the theoretical circle height of an impeller and the blade cone angle, and discloses the formula for the theoretical circle height of the impeller: H=a1+a2-Hb, as shown below. Figure 3 As shown, a1 is the height difference between the inner sleeve surface and the connecting column surface, a2 is the height of the connecting column, and Hb is the height of the inner sleeve. To measure the theoretical circle height of the impeller, a1, a2, and Hb need to be measured beforehand and then calculated. Multiple data points can easily lead to measurement errors, affecting the final test result of the theoretical circle height. In addition, this method of calculating the theoretical circle height is cumbersome and cannot quickly determine whether the theoretical circle height meets the tolerance dimensional requirements, thus failing to meet the testing requirements of mass-produced products.

[0004] Based on the above defects and shortcomings, it is necessary to improve the existing technology and design a device for measuring the theoretical circle height of a water pump impeller. Utility Model Content

[0005] The main technical problem solved by this utility model is to provide a device for measuring the theoretical circle height of a water pump impeller. The device has accurate hole positioning, reliable measurement results, simple structure, is convenient and quick, can judge whether a result is qualified or not, and provides results rapidly with high detection efficiency.

[0006] To solve the above-mentioned technical problems, the present invention provides a technical solution as follows: A device for measuring the theoretical circle height of a water pump impeller is provided. The water pump includes a pump body, a bearing, and an impeller. A bearing is vertically mounted on the pump body, with its lower end interlocked with the inner bore of the pump body. An impeller is mounted on the upper end of the bearing, with the impeller interlocked with the upper end of the bearing through its inner bore. A theoretical circle is located on the inclined surface of the impeller. The height H of the theoretical circle is the distance from the intersection of the theoretical circle and the impeller cone to the upper plane of the pump body. This device for measuring the theoretical circle height of the water pump impeller includes a measuring ring and a guide positioning ring. The guide positioning ring is placed on... On the upper surface of the pump body, the guide positioning ring has a positioning inner hole that fits with the outer diameter of the impeller. A measuring ring is fitted inside the guide positioning ring, and the outer diameter of the measuring ring fits with the positioning inner hole. The inner diameter of the measuring ring is consistent with the theoretical circular size of the impeller. The upper end face of the measuring ring consists of a high step and a low step. The height h1 of the high step to the bottom surface of the measuring ring + the lower limit dimension Hmin of the theoretical circular height H = the height H2 of the positioning guide ring; the height h2 of the low step to the bottom surface of the measuring ring + the upper limit dimension Hmax of the theoretical circular height H = the height H2 of the positioning guide ring.

[0007] Preferably, both the upper and lower steps are semi-circular.

[0008] Preferably, the lower section of the staircase is at a lower height than the upper section of the staircase.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] The design of the measuring ring and the inner and outer rings of the positioning ring is simple in structure, allows for rapid positioning and detection of the theoretical circle height H of the impeller, ensures accurate hole positioning, reliable measurement results, and rapid judgment of pass / fail results. It also provides high detection efficiency and can be used for quantitative and accurate measurement as a basis for adjusting the impeller installation dimensions. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a water pump impeller.

[0012] Figure 2 This is a cross-sectional view of a water pump impeller.

[0013] Figure 3 This is a schematic diagram of a rapid measurement structure for the theoretical circle height of an impeller and the cone angle of its blades.

[0014] Figure 4 This is a schematic diagram of a device for measuring the theoretical circle height of a water pump impeller.

[0015] Figure 5 This is a schematic diagram of the measuring ring structure of a water pump impeller theoretical circle height measuring device.

[0016] Figure 6This is a cross-sectional view of a device for measuring the theoretical circle height of a water pump impeller.

[0017] Among them, 1. Pump body; 2. Bearing; 3. Impeller; 4. Measuring ring; 41. High-section step; 42. Low-section step; 5. Guide positioning ring; 50. Positioning inner hole. Detailed Implementation

[0018] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0019] Please see Figures 4 to 6 The embodiments of this utility model include:

[0020] A device for measuring the theoretical circle height of a water pump impeller includes a measuring ring 4 and a guide positioning ring 5. The guide positioning ring 5 is placed on the upper plane of the water pump body 1. The guide positioning ring 5 has a positioning inner hole 50 that is clearance-fitted with the outer diameter of the impeller 3. The measuring ring 4 is fitted inside the guide positioning ring 5. The outer diameter of the measuring ring 4 fits with the positioning inner hole 50. The inner diameter of the measuring ring 4 is consistent with the theoretical circle size of the impeller, which is Φ48mm. The upper end face of the measuring ring 4 is composed of a high step 41 and a low step 42. Both the high step 41 and the low step 42 are semi-circular. The height of the low step 42 is lower than the height of the high step 41.

[0021] The height from the upper step 41 to the bottom of the measuring ring 4 is h1, and the height from the lower step 42 to the bottom of the measuring ring 4 is h2.

[0022] The lower limit dimension Hmin of the theoretical circle height H of the upper inclined surface of impeller 3 is 11.9mm, 11.9 = 12.4 - 0.5; the upper limit dimension Hmax of the theoretical circle height H of the upper inclined surface of impeller 3 is 12.9mm, 12.9 = 12.4 + 0.5.

[0023] The height of the positioning guide ring 5 is H2.

[0024] The height h1 from the upper step 41 to the bottom of the measuring ring 4, plus the lower limit dimension Hmin of the theoretical circular height H, equals the height H2 of the positioning guide ring 5; specifically: h1 + (12.4 - 0.5) = 22.4 mm. Figure 6 (As shown, 22.4mm).

[0025] The height h2 from the bottom of the lower step 42 to the bottom of the measuring ring 4, plus the upper limit dimension Hmax of the theoretical circular height H, equals the height H2 of the positioning guide ring 5; specifically: h2 + (12.4 + 0.5) = 22.4 mm. Figure 6 (As shown, 22.4mm).

[0026] The present invention discloses a device for measuring the theoretical circular height of a water pump impeller. When in operation, the device includes the following steps: S1, pressing the bearing 2 into the inner hole of the water pump body 1 to ensure the assembly position; S2, pressing the impeller 3 onto the upper end of the bearing 2 to ensure the assembly position; S3, placing the guide positioning sleeve 5 onto the water pump body 1, with the positioning inner hole 50 positioned by the outer diameter of the impeller 3; S4, placing the measuring ring 4 into the guide positioning ring 5, with the outer diameter of the measuring ring 4 positioned by the positioning inner hole 50; S5, visually inspecting and manually touching the upper surface of the measuring ring 4, ensuring that the higher step 41 is higher than the upper surface of the guide positioning ring 5, and the lower step 42 is lower than the upper surface of the guide positioning ring 5. The above indicates that the installation height of impeller 3 is qualified; if the upper step 41 of measuring ring 4 is lower than the upper plane of guide positioning ring 5 (the value can be measured and defined as value A), it means that the assembly height of impeller 3 is too low; if the lower step 42 of measuring ring 4 is higher than the upper plane of guide positioning ring 5 (the value can be measured and defined as value B), it means that the assembly height of impeller 3 is too high; S6, whether it is first piece production or batch production, the assembly height of impeller 3 can be checked for out of tolerance through steps S3-S5, and the pressing dimensions can be adjusted in time according to the values ​​A and B of step S5 to ensure that the height of impeller 3 is within the tolerance requirements.

[0027] This utility model relates to a device for measuring the theoretical circle height of a water pump impeller. It features accurate hole positioning, reliable measurement results, simple structure, convenience, speed, and quick results for determining pass / fail status, resulting in high testing efficiency.

[0028] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A device for measuring the theoretical circle height of a water pump impeller, the water pump comprising a pump body (1), a bearing (2), and an impeller (3), wherein the bearing (2) is vertically mounted on the pump body (1), the lower end of the bearing (2) is interference-fitted with the inner hole of the pump body (1), and the impeller (3) is mounted on the upper end of the bearing (2), the impeller (3) being interference-fitted with the upper end of the bearing (2) through the inner hole, and a theoretical circle is formed on the inclined surface of the impeller (3), the height of the intersection of the theoretical circle and the cone of the impeller (3) from the upper plane of the pump body (1) is the theoretical circle height H, characterized in that: This device for measuring the theoretical circle height of a water pump impeller includes a measuring ring (4) and a guide positioning ring (5). The guide positioning ring (5) is placed on the upper plane of the water pump body (1). The guide positioning ring (5) has a positioning inner hole (50) that is clearance-fitted with the outer diameter of the impeller (3). The measuring ring (4) is fitted inside the guide positioning ring (5). The outer diameter of the measuring ring (4) fits with the positioning inner hole (50). The inner diameter of the measuring ring (4) is consistent with the theoretical circle size of the impeller. The upper end face of the measuring ring (4) is composed of a high step (41) and a low step (42). The height h1 of the high step (41) to the bottom surface of the measuring ring (4) + the lower limit dimension Hmin of the theoretical circle height H = the height H2 of the positioning guide ring (5). The height h2 of the low step (42) to the bottom surface of the measuring ring (4) + the upper limit dimension Hmax of the theoretical circle height H = the height H2 of the positioning guide ring (5).

2. The device for measuring the theoretical circle height of a water pump impeller according to claim 1, characterized in that: Both the upper step (41) and the lower step (42) are semi-circular.

3. The device for measuring the theoretical circle height of a water pump impeller according to claim 1, characterized in that: The lower section of the stairs (42) is located at a lower height than the upper section of the stairs (41).

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