Spiral solid mandrel protection device

Abstract

The utility model discloses a spiral solid core shaft protection device, which belongs to the technical field of matched parts of workshop equipment, and comprises a steel sleeve component which is assembled on an installation section and is in clearance fit with the installation section, the steel sleeve component and the installation section are respectively provided with a key groove which extends axially, and the steel sleeve component and the installation section are respectively provided with a screw. At least one set of auxiliary holes are formed in the steel jacket component, each set of auxiliary holes is composed of two round holes which are symmetrically arranged relative to the axis of the steel jacket component, and each round hole extends in the radial direction. The steel sleeve component is designed and machined on the mounting section of the solid mandrel to protect the solid mandrel from being abraded, and on the basis of the process hole in the steel sleeve component, the steel sleeve component can be rapidly and conveniently replaced on line when the abrasion exceeds the standard, the manpower and material resource investment for inspection and maintenance is small, the labor intensity of workers is reduced, and production is rapidly recovered.

Description

Technical Field

[0001] The utility model belongs to the technical field of workshop equipment supporting parts, and particularly relates to a spiral solid core shaft protection device. Background Art

[0002] The solid stepped shaft at the load and non-load ends of the spiral and the stuffing box packing come into contact and wear during operation. When the core shaft wears beyond the standard, the stuffing box sealing packing cannot effectively seal the shaft, causing serious material leakage and environmental impact. The labor cost is high and the effect is poor. The increased wear in the later period causes a high risk of shaft breakage. The existing spiral solid core shaft cannot be repaired online after wear, and the only option is to replace the entire spiral or core shaft, which is too costly. Utility Model Content

[0003] The purpose of the utility model is to provide a spiral solid core shaft protection device to solve the wear problem of the existing solid core shaft during operation proposed in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a spiral solid core shaft protection device, wherein the solid core shaft has a mounting section, and the protection device comprises:

[0005] The steel sleeve component is assembled on the mounting section and forms a clearance fit with the mounting section. The steel sleeve component and the mounting section are both provided with axially extending keyways, and the steel sleeve component is provided with at least one group of process holes. A single group of process holes is composed of two circular holes symmetrically arranged about the axis of the steel sleeve component, and a single circular hole extends in the radial direction.

[0006] Preferably, the steel sleeve component has an axial first end and a second end, and the keyway on the steel sleeve component is formed by extending axially inwardly from the end surface of the first end.

[0007] Preferably, the mounting section is provided with a spring groove at the second end of the steel sleeve component.

[0008] Preferably, the first end of the steel sleeve member and the solid core shaft are positioned by a shoulder.

[0009] Preferably, the process hole is arranged adjacent to the second end of the steel sleeve component.

[0010] Preferably, the upper deviation of the clearance fit between the installation section and the steel high component is +0.35mm, and the lower deviation is +0.20mm.

[0011] Preferably, a stuffing box is provided on the radially outer side of the solid core shaft, and the stuffing box comprises a cylindrical member having a first cylindrical portion extending along the axis of the solid core shaft and,

[0012] The second cylindrical portion has an inner diameter smaller than that of the first cylindrical portion, and an outer diameter larger than that of the first cylindrical portion and smaller than that of the first cylindrical portion.

[0013] Preferably, the first cylindrical portion is provided with a plurality of threaded holes on an end surface away from the second cylindrical portion.

[0014] Preferably, the stuffing box further comprises a gland member, wherein the gland member comprises:

[0015] an inserting portion, the outer wall of which is in contact with the inner wall of the first cylindrical portion, and the inner diameter of the inserting portion is equal to the inner diameter of the second cylindrical portion;

[0016] The cover body is formed by extending one end of the inserting portion outward in a radial direction, and the cover body is provided with a mounting hole corresponding to the threaded hole on the end surface of the first cylindrical portion.

[0017] Preferably, the mounting hole is a threaded hole.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The present application protects the solid shaft from wear by designing and processing a steel sleeve component at the installation section of the solid core shaft. Based on the process holes on the steel sleeve component and in conjunction with maintenance processes such as hydraulic pullers, the steel sleeve component can be quickly and conveniently replaced online when the wear exceeds the standard. The inspection and maintenance requires less manpower and material resources, reducing the labor intensity of workers and quickly resuming production. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the overall schematic diagram of the solid mandrel;

[0021] Figure 2 It is a partial schematic diagram of the solid core shaft;

[0022] Figure 3 It is a schematic diagram of the rigid casing component;

[0023] Figure 4 for Figure 3 AA section along the middle edge;

[0024] Figure 5 It is a schematic diagram of a cylindrical component;

[0025] Figure 6 Schematic diagram of the gland component.

[0026] In the picture:

[0027] 100. Solid core shaft; 101. Mounting section;

[0028] 200, steel sleeve member; 200a, first end; 200b, second end; 201, keyway; 202, process hole;

[0029] 300, cylindrical member; 300a, first cylindrical portion; 300b, second cylindrical portion; 301, cover member; 301a, insertion portion; 301b, cover portion. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] A protective device for a spiral solid core shaft 100 (hereinafter referred to as the protective device) includes a steel sleeve component 200. The steel sleeve component 200 is assembled on the solid core shaft 100 and is configured to rotate synchronously with the solid core shaft 100. The steel sleeve component 200 is constructed as a contact piece with a stuffing box to reduce the wear of the solid core shaft 100 during rotation.

[0032] Reference Figure 1 and Figure 2 The solid core shaft 100 has a mounting section 101, and the steel sleeve component 200 is assembled on the mounting section 101, and the mounting section 101 of the solid shaft body and the steel sleeve component 200 are configured as a clearance fit. For example, the upper deviation of the clearance fit is +0.35mm, and the lower deviation is +0.20mm. Further, the steel sleeve component 200 and the mounting section 101 of the solid shaft body are configured as a key connection, that is, the inner wall of the steel sleeve component 200 and the outer wall of the mounting section 101 are provided with a keyway 201, and the assembly of the steel sleeve component 200 and the mounting section 101 is achieved by a flat key, etc., and the circumferential torque is transmitted. In some examples, referring to Figure 3 and Figure 4The steel sleeve component 200 has an axial first end 200a and a second end 200b. The keyway 201 on the steel sleeve component 200 is formed by extending the end surface of the axial first end 200a along the axial direction. In some embodiments, the first end 200a of the steel sleeve component 200 and the solid shaft body are positioned by a shaft shoulder. Correspondingly, the mounting section 101 of the solid shaft body is provided with a spring slot at the second end 200b of the steel sleeve component 200 to limit the axial movement of the steel sleeve component 200 during the movement. Furthermore, in order to facilitate the disassembly of the steel sleeve component 200, a spring slot is provided at the second end 200b of the solid shaft body to limit the axial movement of the steel sleeve component 200 during the movement. In some embodiments, at least one group of process holes 203 is provided on the steel sleeve component 200. A single group of process holes 203 is composed of two circular holes symmetrically arranged about the axis of the steel sleeve component 200. A single circular hole extends in a radial direction, and the axis of the circular hole passes through the axis of the steel sleeve component 200. At the same time, the two circular holes of the single group of process holes 203 constitute mounting holes for the pin shaft during the installation process of the steel sleeve component 200. The steel sleeve component 200 is dismantled by using the pin shaft in conjunction with maintenance processes such as hydraulic pullers. In some examples, the process holes 203 are arranged adjacent to the second end 200b of the steel sleeve component.

[0033] In order to adapt to the improvement of the steel sleeve member 200, it is necessary to improve the adaptability of the stuffing box used in conjunction with the solid shaft. Specifically, it is necessary to modify the size and structure of the stuffing box based on the size of the solid shaft with the steel sleeve member 200 and the stress and heat requirements. In some embodiments, refer to Figure 5 The stuffing box includes a cylindrical member 300, which has a first cylindrical portion 300a and a second cylindrical portion 300b. The first cylindrical portion 300a and the second cylindrical portion 300b are both extended along the axis of the solid core shaft 100, and the inner diameter of the second cylindrical portion 300b is smaller than the inner diameter of the first cylindrical portion 300a. The outer diameter of the second cylindrical portion 300b is larger than the inner diameter of the first cylindrical portion 300a and smaller than the outer diameter of the first cylindrical portion 300a. That is, the end of the first cylindrical portion 300a away from the second cylindrical portion 300b is configured as The large diameter end of the cylindrical member 300, the end of the second cylindrical portion 300b away from the first element synchronization constitutes the small diameter end of the cylindrical member 300, and the cylindrical member 300 is provided with a plurality of threaded holes at the large diameter end position. Further, the stuffing box body further comprises a gland member 301, the gland member 301 having an insertion portion 301a that can be inserted from the large diameter end of the cylindrical member 300, the outer wall of the insertion portion 301a is fitted with the inner wall of the first cylindrical portion 300a, and the inner diameter of the insertion portion 301a is equal to the inner diameter of the first cylindrical portion 300a, refer to Figure 6The above-mentioned pressure cover component 301 also has a cover body portion 301b, which is formed by radially extending outward from one end of the insertion portion 301a, and is provided with a mounting hole at a position corresponding to the threaded hole at the large diameter end of the cylindrical component 300. In some examples, the above-mentioned mounting hole is a threaded hole, and the connection between the cylindrical component 300 and the pressure cover component 301 is achieved based on fasteners such as bolts.

[0034] The assembly process of the above-mentioned solid core shaft 100, steel sleeve component 200 and stuffing box is as follows: 1. First, the improved solid core shaft 100 spare parts are completed and the horizontality and coaxiality tolerances are corrected within ±0.05mm. The solid core shaft 100 is installed in the spiral cylinder body to restore the spiral load end and non-load end wallboard bolts and tighten. The installation flat key is required to have an interference fit with the solid core shaft 100, and is inserted into the steel sleeve component 200 and the spring clamp; 2. The small diameter end of the cylindrical component 300 is inserted into the center hole of the spiral wallboard, and the solid core shafts 100 at both ends are lifted and adjusted with a jack. The vertical center elevation of the solid core shaft 100 is found with a height vernier caliper, and the horizontal center is found with a depth vernier; 3. Use a feeler gauge to check The clearance between the cylindrical component 300 and the solid core shaft 100 in the X, Y and Z directions ensures a coaxial error of ±0.05mm; 4. Use a depth vernier to detect the parallelism between the end face of the cylindrical component 300 and the wall panel; 5. After the cylindrical component 300 is symmetrically positioned by electric welding in the circumferential direction, re-check the size and then use electric welding to symmetrically short weld until it is fully welded; 6. Install the pressure cover component 301, bearing and bearing seat on the solid core shaft 100 to confirm the positioning of the solid core shaft 100; 7. Cut multiple packings around the circumference of the steel sleeve component 200, apply yellow dry oil 7019, and press them into the stuffing box; 8. Install the pressure cover component 301 and connect it with stud bolts; 9. Reinstall the coupling, motor reducer and elastic bolts; 10. Restore the safety cover and exit the site after three clearances.

[0035] After the steel sleeve component 200 is worn, the steel sleeve component 200 can be removed by the following methods: Method 1, use a hydraulic (mechanical screw) puller with two parallel claws on the pins of the process hole 203 group of the steel sleeve component 200 as support points, and the puller and the process hole 203 group of the solid core shaft 100 as support points. The puller's force pulls out the steel sleeve component 200 on the two arms (the steel sleeve component 200 and the solid core shaft 100 are clearance-matched); Method 2, make two semicircles with the cross-sectional diameter of the steel sleeve component 200, weld stiffeners on both sides of the semicircle, cut holes in the stiffeners on both sides, put the two semicircles on the steel sleeve component 200 and bolt them together to form a whole, the thrust point is on the pins of the process hole 203 group of the steel sleeve component 200, and the two claws of the puller are placed on the stiffeners on both sides to pull out the steel sleeve component 200 after being subjected to force.

[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spiral solid core shaft protection device, characterized in that: The solid core shaft has a mounting section, and the protective device includes: The steel sleeve component is assembled on the mounting section and forms a clearance fit with the mounting section. The steel sleeve component and the mounting section are both provided with axially extending keyways, and the steel sleeve component is provided with at least one group of process holes. A single group of process holes is composed of two circular holes symmetrically arranged about the axis of the steel sleeve component, and a single circular hole extends in the radial direction.

2. A spiral solid core shaft protection device according to claim 1, characterized in that: The steel sleeve component has an axial first end and a second end, and a keyway on the steel sleeve component is formed by extending axially inwardly from the end surface of the first end.

3. A spiral solid core shaft protection device according to claim 2, characterized in that: The installation section is provided with a spring groove at the second end of the steel sleeve component.

4. The spiral solid core shaft protection device according to claim 1, characterized in that: The first end of the steel sleeve member and the solid core shaft are positioned by a shoulder.

5. The spiral solid core shaft protection device according to claim 1, characterized in that: The process hole is arranged adjacent to the second end of the steel jacket component.

6. The spiral solid core shaft protection device according to claim 1, characterized in that: The upper deviation of the clearance fit between the installation section and the steel high component is +0.35mm, and the lower deviation is +0.20mm.

7. The spiral solid core shaft protection device according to claim 1, characterized in that: A stuffing box is provided on the radially outer side of the solid core shaft. The stuffing box includes a cylindrical member having a first cylindrical portion extending along the axis of the solid core shaft and The second cylindrical portion has an inner diameter smaller than that of the first cylindrical portion, and an outer diameter larger than that of the first cylindrical portion and smaller than that of the first cylindrical portion.

8. The spiral solid core shaft protection device according to claim 7, characterized in that: The first cylindrical portion is provided with a plurality of threaded holes on an end surface away from the second cylindrical portion.

9. The spiral solid core shaft protection device according to claim 8, characterized in that: The stuffing box further comprises a gland member, wherein the gland member comprises: an inserting portion, the outer wall of which is in contact with the inner wall of the first cylindrical portion, and the inner diameter of the inserting portion is equal to the inner diameter of the second cylindrical portion; The cover body is formed by extending one end of the inserting portion outward in a radial direction, and the cover body is provided with a mounting hole corresponding to the threaded hole on the end surface of the first cylindrical portion.

10. The spiral solid core shaft protection device according to claim 9, characterized in that: The mounting hole is a threaded hole.

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