Screw conveyer tail transmission part for conveying high-temperature materials

Abstract

The utility model provides a screw conveyer tail transmission part for conveying high-temperature materials. The screw conveyer tail transmission part comprises a core shaft, the spiral blade is arranged on the surface of the core shaft; the tail transmission part is connected with the tail end of the mandrel; the sealing cavity is arranged on the axis of the tail transmission part; wherein the sealing cavity consists of a closed space consisting of a medium channel hole of the sealing flange, a channel hole of the sealing seat and the sealing gland; the involute spline shaft is arranged between the tail spiral mandrel and the tail transmission part, the compensation part is arranged between the tail spiral mandrel and the tail transmission part, and the sealing piece is arranged in the sealing cavity. The involute spline sleeve and the involute spline shaft are arranged between the tail spiral mandrel and the tail transmission part, so that the expansion amount and the contraction amount of the whole mandrel are increased; the axial sliding of the spline shaft between the spline sleeves is used for compensating, meanwhile, the bearing is arranged in the relatively sealed cavity of the transmission part, and the graphite packing and the framework oil seal at the front section have a good sealing effect, so that the problem that dust enters the transmission part is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of screw conveyors, in particular to a tail transmission part of a screw conveyor for conveying high-temperature materials. Background Art

[0002] Screw conveyors have the advantages of simple structure, small cross-sectional area, easy operation, easy maintenance, and convenient closed transportation. They are widely used in the carbon industry.

[0003] However, when the currently used screw conveyors transport high-temperature materials, due to thermal expansion and contraction, the spiral core shaft is in a state of moving back and forth inside the shell. The movement can easily cause dust to enter the tail transmission part and cause it to lock, seriously affecting the service life of the tail transmission part.

[0004] Taking all the above factors into consideration, the problem of locking of the tail transmission part of the screw conveyor when conveying high-temperature materials needs to be solved as soon as possible. Utility Model Content

[0005] The utility model aims to solve the problem in the prior art that when the core shaft of the screw conveyor conveys high-temperature materials, its thermal expansion and contraction causes the core shaft to move back and forth, thereby causing dust to enter and lock the tail transmission part.

[0006] In order to achieve the above-mentioned purpose, the present application proposes a tail transmission part of a screw conveyor for conveying high-temperature materials, comprising: a core shaft; spiral blades arranged on the surface of the core shaft; a tail transmission part connected to the end of the core shaft; a sealing cavity installed on the axis of the tail transmission part; wherein the sealing cavity is composed of a closed space consisting of a medium channel hole of a sealing flange, a channel hole of a sealing seat and a sealing pressure cover; a compensation part installed between the tail spiral core shaft and the tail transmission part, and a seal installed in the sealing cavity.

[0007] The tail transmission part of the screw conveyor for conveying high-temperature materials of the present application installs an involute spline sleeve and an involute spline shaft between the tail spiral core shaft and the tail transmission part, so that the expansion and contraction of the entire core shaft are compensated by the axial sliding of the spline shaft between the spline sleeves, which solves the problem in the prior art that when the screw conveyor conveys high-temperature materials, the spiral core shaft is in a repeated expansion and contraction process due to thermal expansion and contraction, and the back and forth movement of the core shaft can easily cause dust intrusion and locking of the tail transmission part.

[0008] As an improvement of the above-mentioned compensation part of the present application, in order to compensate for the forward and backward movement caused by thermal expansion and contraction of the core shaft, the compensation part includes: an involute spline shaft installed at the front end of the sealing cavity and an involute spline sleeve installed on the involute spline shaft.

[0009] Furthermore, in order to achieve a hard connection between the involute spline sleeve, the spiral blade and the core shaft, one end of the involute spline sleeve is tightly fitted with the end surface of the end of the spiral blade.

[0010] Furthermore, in order to reserve a certain movable space for the compensatory movement of the involute spline sleeve along the core shaft direction, the other end of the involute spline shaft and the involute spline sleeve is at a certain distance from the front section of the sealing cavity at natural temperature.

[0011] As an improvement of the above-mentioned seal of the present application, in order to enhance the sealing performance of the tail transmission part, the seal includes: an ink packing installed in the front section of the sealing cavity and a skeleton oil seal installed on both sides of the bearing in the sealing cavity.

[0012] The beneficial effects of this application are:

[0013] 1. The tail transmission part of the screw conveyor for conveying high-temperature materials of the present application utilizes an involute spline shaft and a spline sleeve, which have the characteristics of good sliding performance, compact structure, high strength, and wear resistance. It is installed between the tail spiral core shaft and the tail transmission part. The expansion and contraction of the entire core shaft are compensated by the axial sliding of the spline shaft between the spline sleeves. At this time, the tail transmission part will not be affected by thermal expansion and contraction, which solves the problem that the core shaft of the screw conveyor moves back and forth due to thermal expansion and contraction when conveying high-temperature materials, thereby causing dust to enter and lock the tail transmission part.

[0014] 2. The compensating part in the present application has a relatively strong load-bearing capacity and torque transmission capacity due to the large spline connection area, and is more suitable for high-load and high-speed operation occasions when transporting high-temperature materials.

[0015] 3. The present application realizes relative displacement compensation between two shafts by sliding of the spline. Its compensation capability depends on the sliding performance and matching accuracy of the spline. The compensation capability of the spline connection is more stable and reliable.

[0016] 4. The structure and installation of the spline are relatively simple. It is only necessary to ensure the matching accuracy and sliding performance of the spline to compensate for the forward and backward movement of the core shaft.

[0017] 5. The tail transmission part of the screw conveyor of the present application places the bearing in a relatively sealed cavity of the transmission part. The graphite packing and skeleton oil seal in the front section have a good sealing effect, effectively preventing the entry of dust. Compared with the traditional tail transmission part structure, the bearing life of this structure is at least increased by 3 times. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic structural diagram of a tail transmission part of a screw conveyor for conveying high-temperature materials in an embodiment of the present application;

[0020] Description of reference numerals:

[0021] 1. Mandrel;

[0022] 2. Spiral blades;

[0023] 3. Tail transmission unit;

[0024] 4. Sealing cavity; 41. Sealing flange; 42. Sealing seat; 43. Sealing gland;

[0025] 5. Compensation part; 51. Involute spline shaft; 52. Involute spline sleeve;

[0026] 6. Sealing element; 61. Ink packing; 62. Framework oil seal. DETAILED DESCRIPTION

[0027] The following will be combined with the attached Figure 1 The embodiments of the technical solution of the present application are described in detail. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.

[0028] like Figure 1 The present application illustrates a tail transmission part of a screw conveyor for conveying high-temperature materials, which includes: a core shaft 1; spiral blades 2 arranged on the surface of the core shaft 1; a tail transmission part 3 connected to the end of the core shaft 1; a sealing cavity 4 installed on the axis of the tail transmission part 3; wherein the sealing cavity 4 is composed of a closed space consisting of a medium channel hole of a sealing flange 41, a channel hole of a sealing seat 42 and a sealing cover 43; and is characterized by a compensation part 5 installed between the tail spiral core shaft 1 and the tail transmission part 3, and a seal 6 installed in the sealing cavity 4.

[0029] In one embodiment of the present application, in order to achieve effective compensation for the axial movement of the core shaft 1 caused by thermal expansion and contraction when conveying high-temperature materials, a compensation part 5 is installed between the tail spiral core shaft 1 and the tail transmission part 3. The compensation part 5 specifically includes an involute spline shaft 51 and an involute spline sleeve 52. The involute spline shaft 51 is installed at the front end of the sealing cavity 4, and its concentricity with the sealing cavity 4 is ensured by precision machining. The involute spline sleeve 52 is installed on the involute spline shaft 51, one end of which is tightly fitted with the end face of the end of the spiral blade 2, and is connected by welding or high-strength bolts to ensure the firmness of the connection.

[0030] In the prior art, when a screw conveyor transports high-temperature materials, its core shaft moves back and forth due to thermal expansion and contraction, and the poor sealing performance of the transmission part affects the stability of the screw conveyor during operation. In a screw conveyor, the components that perform the compensation function between the transmission part and the core shaft mainly include various types of couplings. Although they have the ability to compensate for the relative displacement of the two shafts, the torque they transmit is relatively small and is not suitable for high-load and high-speed operation. At the same time, some couplings, such as elastic couplings, can compensate for displacement through the deformation of elastic elements, which will be limited by the life and performance of the elastic elements. In addition, the structure and installation of the coupling are relatively complex, and it is necessary to select the appropriate type and size according to the specific application, and perform precise installation and debugging. Improper installation may lead to reduced transmission performance or vibration and noise.

[0031] In this embodiment, the other ends of the involute spline shaft 51 and the involute spline sleeve 52 maintain a certain distance from the front section of the sealing cavity 4 at natural temperature. This distance is the compensation space for accommodating the axial displacement of the core shaft 1 caused by thermal expansion and contraction.

[0032] Continue to refer to Figure 1 In a further embodiment, a sealing cavity 4 is installed on the axis of the tail transmission part 3. The sealing cavity 4 is composed of a sealing flange 41, a sealing seat 42 and a sealing gland 43, which are tightly connected by bolts to form a closed cavity space for protecting the internal transmission parts from the external environment.

[0033] Further, continue to refer to Figure 1 In order to further enhance the sealing performance, we installed a seal 6 in the sealing cavity 4. The seal 6 includes an ink packing 61 installed in the front section of the sealing cavity 4 and a skeleton oil seal 62 installed on both sides of the bearing in the sealing cavity 4. The ink packing 61 has good high temperature resistance and sealing performance, and can effectively prevent external dust from entering the sealing cavity 4. The skeleton oil seal 62 is installed on both sides of the bearing, and through the close contact between its elastic lip and the shaft and the cavity, a reliable sealing barrier is formed to prevent lubricating oil leakage and external impurities from invading.

[0034] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "upper", "lower", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description. They do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0035] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "set", "provided with", "connected", "installed" and the like should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or integrated; they can be directly connected, or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0036] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tail transmission part of a screw conveyor for conveying high-temperature materials, comprising: A core shaft (1); a spiral blade (2) arranged on the surface of the core shaft (1); a tail transmission part (3) connected to the end of the core shaft (1); a sealing cavity (4) installed on the axis of the tail transmission part (3); wherein the sealing cavity (4) is composed of a closed space consisting of a medium channel hole of a sealing flange (41), a channel hole of a sealing seat (42) and a sealing cover (43); and characterized by a compensation part (5) installed between the tail spiral core shaft (1) and the tail transmission part (3) and a sealing member (6) installed in the sealing cavity (4).

2. The tail transmission part of the screw conveyor according to claim 1, characterized in that: The compensating part (5) comprises: an involute spline shaft (51) mounted on the front end of the sealing cavity (4) and an involute spline sleeve (52) mounted on the involute spline shaft (51).

3. The tail transmission part of the screw conveyor according to claim 2, characterized in that: One end of the involute spline sleeve (52) is tightly fitted to the end surface of the end of the spiral blade (2).

4. The tail transmission part of the screw conveyor according to claim 3, characterized in that: The other ends of the involute spline shaft (51) and the involute spline sleeve (52) are at a certain distance from the front section of the sealing cavity (4) at natural temperature.

5. The tail transmission part of the screw conveyor according to claim 1, characterized in that: The sealing element (6) comprises: an ink packing (61) installed at the front section of the sealing cavity (4) and a skeleton oil seal (62) installed at both sides of the bearing in the sealing cavity (4).

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