A limiting sleeve for water supply pump coupling installation

Abstract

The utility model provides a kind of limit sleeve for water supply pump coupling installation, the utility model discloses by presetting limit reference surface, coupling axial installation deviation is controlled within 0.1mm, ensure that the interference amount of 1:24 taper cooperation meets design requirement, solve the size deviation problem caused by artificial visual inspection, limit sleeve can be reused, installation process does not need to rely on artificial experience, and once installation qualified rate is promoted to 98% or more, substantially reduce the rework cost due to position deviation, structure adaptability is strong: cooperation conical inner hole and the 1:24 taper matching of pump shaft, ensure that sleeve itself is installed firmly, without axial sliding risk, while installation is convenient: using split sleeve and screw fastening structure, without disassembling other components of pump shaft can be completed installation, ensure that pump shaft is damaged under the condition of suitable for on-site rapid operation.

Description

Technical Field

[0001] This utility model relates to the field of limiting sleeve technology, and in particular to a limiting sleeve for installing a water pump coupling. Background Technology

[0002] In existing technology, the installation process of couplings is as follows: first, the coupling is heated (usually by oil bath or electric heating) to expand its inner bore and fit it onto the conical section of the pump shaft. Then, the interference fit is achieved by the contraction after cooling. However, in this process, the axial position of the coupling depends entirely on manual visual inspection or experience. It is very easy for the axial dimension to deviate (usually more than 0.5mm) due to factors such as deviation in the control of heating expansion and uneven installation thrust. This causes the actual interference fit to deviate from the design value. Such deviations need to be adjusted by rework (such as reheating and disassembling, grinding the mating surfaces, etc.), which not only increases the labor cost, but may also damage the mating surfaces of the pump shaft or coupling due to repeated disassembly and assembly, affecting the safe operation of the unit.

[0003] Therefore, it is essential to provide a limiting sleeve for installing a water pump coupling to address the shortcomings of existing technologies. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies by providing a limiting sleeve for installing a water pump coupling. This invention controls the axial installation deviation of the coupling to within 0.1mm by pre-setting a limiting reference surface, ensuring that the interference fit of the 1:24 taper meets design requirements. It solves the problem of dimensional deviation caused by manual visual inspection. The limiting sleeve is reusable, and the installation process does not rely on manual experience, increasing the first-time installation pass rate to over 98%, significantly reducing rework costs caused by positional deviations. It has strong structural adaptability: the matching of the tapered inner hole with the 1:24 taper of the pump shaft ensures the sleeve itself is firmly installed without the risk of axial slippage. Simultaneously, installation is convenient: the split sleeve and screw fastening structure allows installation to be completed without disassembling other pump shaft components, ensuring suitability for rapid on-site operation even under conditions of pump shaft damage.

[0005] The above-mentioned objectives of this utility model are achieved through the following technical means.

[0006] A limiting sleeve for installing a water pump coupling is provided, including an upper sleeve and a lower sleeve that cooperate with each other. The upper sleeve and the lower sleeve together form a shaft hole that is adapted to the pump shaft of the water pump. A 4mm gap is left between the upper sleeve and the lower sleeve. The upper sleeve and the lower sleeve are detachably connected by screws distributed circumferentially between them. The limiting sleeve is fastened to the axial position of the pump shaft of the water pump by screws.

[0007] Specifically, the inner walls of the upper and lower jackets are provided with tapered surfaces that match the 1:24 taper of the water pump shaft, and the surface roughness of the tapered surfaces is no greater than Ra1.6μm.

[0008] Specifically, there are 4-6 screws, which are evenly distributed circumferentially along the mating surface of the upper and lower sleeves, and the axis of the screws is perpendicular to the radial direction of the upper and lower sleeves.

[0009] Specifically, one end face of the upper and lower jackets serves as a limiting reference surface, and the flatness of the limiting reference surface is no greater than 0.02mm.

[0010] Specifically, the upper and lower jackets are forged from No. 45 steel, and their surfaces are hardened.

[0011] This invention controls the axial installation deviation of the coupling within 0.1mm by pre-setting a limiting reference surface, ensuring that the interference fit of the 1:24 taper meets the design requirements. It solves the problem of dimensional deviation caused by manual visual inspection. The limiting sleeve is reusable, and the installation process does not rely on manual experience. The first-time installation qualification rate is increased to over 98%, significantly reducing rework costs caused by positional deviations. The structure is highly adaptable: the matching of the tapered inner hole with the 1:24 taper of the pump shaft ensures that the sleeve itself is firmly installed without the risk of axial slippage. At the same time, the installation is convenient: the split sleeve and screw fastening structure can be used to complete the installation without disassembling other parts of the pump shaft, ensuring that it is suitable for rapid on-site operation even if the pump shaft is damaged. Attached Figure Description

[0012] The present invention will be further described with reference to the accompanying drawings, but the content of the drawings does not constitute any limitation on the present invention.

[0013] Figure 1 This is a schematic diagram of the overall structure of a limiting sleeve for installing a water pump coupling according to this utility model.

[0014] Figure 2 This is a front view of a limiting sleeve for installing a water pump coupling according to this utility model.

[0015] Figure 3 This is a left view of a limiting sleeve for installing a water pump coupling according to this utility model.

[0016] from Figures 1 to 3 Including: 1. Apply a jacket; 2. Lower jacket; 3. Shaft hole; 4. Screws; 5. Couplings; 6. Conical surface. Detailed Implementation

[0017] The present invention will be further described in conjunction with the following embodiments.

[0018] Example 1. like Figure 1-3 As shown, a limiting sleeve for installing a water pump coupling includes an upper sleeve 1 and a lower sleeve 2 that cooperate with each other. The upper sleeve 1 and the lower sleeve 2 together form a shaft hole 3 that is adapted to the pump shaft of the water pump. A 4mm gap is left between the upper sleeve 1 and the lower sleeve 2, and a 4mm gap is left between the mating surfaces of the sleeve and the lower sleeve 2. This gap is evenly distributed along the circumference of the sleeve, which can compensate for the machining dimensional error of the pump shaft (usually ±0.05mm) and the slight deformation when the sleeve is tightened, ensuring that the sleeve and the pump shaft fit tightly without generating additional stress. The upper sleeve 1 and the lower sleeve 2 are detachably connected by screws 4 distributed along the circumference. The limiting sleeve is tightened to the axial position of the pump shaft of the water pump by the screws 4.

[0019] The inner walls of the upper jacket 1 and the lower jacket 2 are provided with tapered surfaces 6 that match the 1:24 taper of the water pump shaft. The surface roughness of the tapered surfaces 6 is no greater than Ra1.6μm. The inner walls of the upper jacket 1 and the lower jacket 2 are machined with tapered surfaces 6 that perfectly match the 1:24 taper of the water pump shaft. The tapered surfaces 6 are precision ground to a surface roughness no greater than Ra1.6μm. This design ensures that the tapered surface fit between the jacket and the pump shaft is ≥95%, avoiding axial slippage due to poor contact, and reducing wear on the pump shaft surface.

[0020] There are 4-6 screws 4, which are evenly distributed around the mating surface of the upper sleeve 1 and the lower sleeve 2. The axis of the screws 4 is perpendicular to the radial direction of the upper sleeve 1 and the lower sleeve 2.

[0021] One end face of the upper jacket 1 and the lower jacket 2 serves as a limiting reference surface. The flatness of the limiting reference surface is no greater than 0.02mm. The end faces of the upper jacket 1 and the lower jacket 2 together constitute the limiting reference surface. This end face is machined by ultra-precision grinding, and its flatness is no greater than 0.02mm. It is also strictly perpendicular to the jacket axis (perpendicularity error ≤0.01mm / m). When the coupling 5 is heated and fitted onto the pump shaft, its end face fits against this reference surface, thus ensuring that the axial position deviation is controlled within 0.1mm.

[0022] The upper jacket 1 and the lower jacket 2 are forged from No. 45 steel. The surfaces of the upper jacket 1 and the lower jacket 2 are quenched. The jacket and the lower jacket 2 are forged as a whole from No. 45 steel to ensure uniform internal structure of the material and avoid casting defects. The surface is quenched as a whole, and the hardness reaches HRC40-45, which ensures sufficient strength (tensile strength ≥600MPa) and good wear resistance. The service life can reach more than 500 installation operations.

[0023] This utility model controls the axial installation deviation of the coupling 5 within 0.1mm by pre-setting a limiting reference surface, ensuring that the interference of the 1:24 taper fit meets the design requirements. It solves the problem of dimensional deviation caused by manual visual inspection. The limiting sleeve can be reused, and the installation process does not rely on manual experience. The first-time installation qualification rate is increased to over 98%, which greatly reduces the rework cost caused by positional deviation. The structure is highly adaptable: the matching of the tapered inner hole with the 1:24 taper of the pump shaft ensures that the sleeve itself is firmly installed without the risk of axial slippage. At the same time, the installation is convenient: the split sleeve and screw 4 fastening structure can be used to complete the installation without disassembling other parts of the pump shaft, ensuring that it is suitable for rapid on-site operation under the condition of pump shaft damage.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A spacer sleeve for water pump coupling installation, characterized by: It includes an upper and a lower clamping sleeve that cooperate with each other. The upper and lower clamping sleeves together form a shaft hole that is adapted to the pump shaft of the water supply pump. A 4mm gap is left between the upper and lower clamping sleeves. The upper and lower clamping sleeves are detachably connected by screws distributed circumferentially. The limiting sleeve is fastened to the axial position of the pump shaft of the water supply pump by screws.

2. The limiting sleeve for water pump coupling installation according to claim 1, characterized in that: The inner walls of the upper and lower jackets are provided with tapered surfaces that match the 1:24 taper of the water pump shaft, and the surface roughness of the tapered surfaces is not greater than Ra1.6μm.

3. The limiting sleeve for water pump coupling installation according to claim 2, characterized in that: The number of screws is 4-6, and they are evenly distributed circumferentially along the mating surface of the upper and lower sleeves. The axis of the screws is perpendicular to the radial direction of the upper and lower sleeves.

4. The limiting sleeve for water pump coupling installation according to claim 3, characterized in that: One end face of the upper jacket and the lower jacket is a limiting reference surface, and the flatness of the limiting reference surface is no greater than 0.02mm.

5. The limiting sleeve for water pump coupling mounting according to claim 4, characterized in that: The upper and lower jackets are forged from 45 steel, and their surfaces are hardened.

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