Deflection-controlled crushing components and their vacuum pump

Abstract

This utility model relates to the field of vacuum pump technology, and in particular to a deflection-controllable crushing assembly and its vacuum pump, including a rotating shaft, helical blades, and a moving blade. The rotating blades are provided with shaft holes that match the rotating shaft, and one end of the rotating shaft is disposed in the shaft hole. The rotating blades include a hub section and an extension section disposed at one end of the hub section. Blades are disposed on the outer circumferential surface of the hub section, and one end of the hub section abuts against the rotating shaft. A first radial limiting mechanism is provided between the hub section and the rotating shaft. The extension section extends axially along the rotating blades and protrudes from one end of the rotating shaft. In use, an extension section is provided axially at one end of the hub section, and the extension section protrudes from the rotating shaft. The moving blade is directly disposed on the extension section, and at the same time, the moving blade is fixed to the rotating shaft. This ensures that the deflection deformation of the entire crushing assembly is reduced when the crushing assembly rotates at high speed, thus avoiding the phenomenon of radial runout under high-speed rotation.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pump technology, and in particular to a deflection-controllable crushing component and its vacuum pump. Background Technology

[0002] Crushing vacuum pump (such as) Figure 1 (As shown) It is mainly used in the material conveying process before and after the crushing process, with typical applications including domestic sewage treatment. Its core crushing component consists of a rotating shaft, a moving cutter head, and spiral blades. The spiral blades are mounted on the rotating shaft, with their rear end abutting against the rotating shaft and their front end abutting against the moving cutter head; the front end length of the spiral blades is designed to be shorter than or flush with the end of the rotating shaft. The moving cutter head is fastened to the rotating shaft with screws, forming a rigid connection between the rotating shaft, spiral blades, and moving cutter head.

[0003] However, this structure has a significant problem when the moving cutter head rotates at high speed: under centrifugal force, the entire crushing assembly will undergo flexural deformation. This deformation causes radial runout of the assembly during high-speed rotation, which in turn interferes with the normal operation of the crushing pump. In severe cases, unexpected collisions between components caused by the runout can lead to equipment damage. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to solve the problem that the existing crushing assembly installation structure is affected by deflection when rotating at high speed, which causes the entire crushing assembly to run radially when rotating at high speed, a crushing assembly with controllable deflection and its vacuum pump are provided.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a deflection-controllable crushing component, including a rotating shaft, a spiral blade, and a moving blade. The spiral blade is provided with a shaft hole that matches the rotating shaft. One end of the rotating shaft is disposed in the shaft hole. The spiral blade includes a hub section and an extension section disposed at one end of the hub section. Blades are provided on the outer circumferential surface of the hub section. One end of the hub section abuts against the rotating shaft. A first radial limiting mechanism is provided between the hub section and the rotating shaft. The extension section extends axially along the spiral blade and protrudes from one end of the rotating shaft. The moving blade is disposed on the extension section. A second radial limiting mechanism is provided between the moving blade and the extension section. The moving blade and the rotating shaft have a gap and are fixedly connected to each other. Compared to existing technologies, this solution features an extension section extending axially at one end of the hub section, with the extension section protruding from the rotating shaft. The moving blade is directly mounted on the extension section, and the moving blade is fixed to the rotating shaft. This ensures that the flexural deformation of the entire crushing assembly is reduced when the crushing assembly rotates at high speed, thus avoiding radial runout during high-speed rotation and ensuring stable and reliable high-speed rotation of the crushing assembly.

[0006] To implement the first radial limiting mechanism, in some preferred embodiments, the first radial limiting mechanism includes a first keyway formed on the rotating shaft, and a second keyway formed on the inner peripheral wall of the shaft hole. The first keyway and the second keyway correspond to each other, and matching keys are provided in the first keyway and the second keyway. A keyed connection is established between the hub section and the rotating shaft to achieve power transmission between them, while simultaneously limiting radial displacement between them.

[0007] To further reduce radial runout, in some preferred embodiments, a mounting plate is provided at the end of the extension section away from the hub section. By providing a mounting plate at the end of the extension section, the mounting plate increases the weight at the front end, ensuring the overall weight stability of the helical blade and further reducing its radial runout during high-speed rotation.

[0008] To implement the second radial limiting mechanism, in some preferred embodiments, the second radial limiting mechanism includes a pin. A first pin hole is provided on the end face of the mounting plate, and a second pin hole is provided on the moving blade. The first and second pin holes are arranged opposite to each other, and the pin is disposed within both the first and second pin holes. By providing a pin within the second pin hole of the moving blade and the first pin hole on the mounting plate, radial limiting between them is achieved, preventing radial displacement between the moving blade and the mounting plate and reducing the risk of radial runout.

[0009] In some preferred embodiments, the pin is a spring pin.

[0010] To ensure convenient installation of the moving tool, in some preferred embodiments, the moving tool is provided with a positioning boss, which matches the shaft hole and is disposed within the shaft hole. By providing a positioning boss on the moving tool, the moving tool can be quickly engaged with the extension section, facilitating the installation of the moving tool and improving installation efficiency.

[0011] In some preferred embodiments, the rotating shaft is a stepped shaft, and one end of the hub section abuts against the limiting shoulder of the stepped shaft.

[0012] In order to achieve a fixed connection between the moving tool and the rotating shaft, in some preferred embodiments, the moving tool is provided with a mounting hole, and the other end of the rotating shaft is provided with a threaded hole on its central axis. The mounting hole and the threaded hole are arranged opposite to each other, and a screw passes through the mounting hole and is threaded into the threaded hole, thereby achieving a fixed connection between the moving tool and the rotating shaft.

[0013] In some preferred embodiments, the hub section is frustoconical, with the smaller end of the hub section located near the moving tool.

[0014] A vacuum pump equipped with a deflection-controlled crushing component as described above.

[0015] The beneficial effects of this utility model are as follows: When the deflection-controllable crushing component and its vacuum pump are in use, an extension section is provided at one end of the shaft hub section along the axial direction, and the extension section protrudes from the rotating shaft. The moving blade is directly placed on the extension section, and at the same time, the moving blade is fixed to the rotating shaft. This ensures that the deflection deformation of the entire crushing component is reduced when the crushing component rotates at high speed, thus avoiding the radial runout phenomenon under high-speed rotation. This ensures that the high-speed rotation of the crushing component is stable and reliable, and avoids the problem of radial runout of the entire crushing component under high-speed rotation caused by the deflection of the existing crushing component installation structure. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is the main view of the existing technology;

[0018] Figure 2 This is a front view of Embodiment 1 of this utility model;

[0019] Figure 3 yes Figure 2 Sectional view of AA;

[0020] Figure 4 yes Figure 3 A magnified view of part B in the image;

[0021] Figure 5 yes Figure 4 A magnified view of part C;

[0022] Figure 6 This is a front view of Embodiment 2 of this utility model;

[0023] Figure 7 yes Figure 2 DD section view;

[0024] Figure 8 yes Figure 7 A magnified view of part E in the image.

[0025] In the diagram: 1. Rotary shaft; 101. First keyway; 102. Threaded hole;

[0026] 2. Spiral blade, 201. Shaft hole, 202. Shaft hub section, 203. Extension section, 204. Blade, 205. Second keyway, 206. Mounting plate, 207. First pin hole;

[0027] 3. Moving tool, 301, second pin hole, 302, positioning boss, 303, mounting hole;

[0028] 4. Key;

[0029] 5. Pins;

[0030] 6. Screws;

[0031] 7. Pump casing; 701. Inlet; 702. Outlet; 703. Cavity.

[0032] 8. Static knife;

[0033] 9. Motor. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to the embodiments:

[0035] This utility model is not limited to the following specific embodiments. Those skilled in the art can implement this utility model using various other specific embodiments based on the disclosed content. Any modifications or alterations to the design structure and concept of this utility model also fall within the protection scope of this utility model. It should be noted that, unless otherwise specified, the embodiments and features described in this utility model can be combined with each other.

[0036] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] Example 1, such as Figure 2-5As shown, a deflection-controllable crushing assembly includes a rotating shaft 1, a helical blade 2, and a moving blade 3. The helical blade 2 is provided with a shaft hole 201 that matches the rotating shaft 1. One end of the rotating shaft 1 is disposed in the shaft hole 201. The helical blade 2 includes a hub section 202 and an extension section 203 disposed at one end of the hub section 202. Blades 204 are disposed on the outer circumferential surface of the hub section 202. One end of the hub section 202 abuts against the rotating shaft 1. A first radial limiting mechanism is provided between the hub section 202 and the rotating shaft 1. The extension section 203 extends axially along the helical blade 2 and protrudes from one end of the rotating shaft 1. The moving blade 3 is disposed on the extension section 203. A second radial limiting mechanism is provided between the moving blade 3 and the extension section 203. The moving blade 3 and the rotating shaft 1 have a gap and are fixedly connected to each other.

[0039] The first radial limiting mechanism includes a first keyway 101 formed on the rotating shaft 1, and a second keyway 205 formed on the inner peripheral wall of the shaft hole 201. The first keyway 101 and the second keyway 205 correspond to each other, and a matching key 4 is provided in the first keyway 101 and the second keyway 205.

[0040] An installation plate 206 is provided at one end of the extension section 203 away from the hub section 202. The second radial limiting mechanism includes a pin 5. A first pin hole 207 is provided on the end face of the installation plate 206. A second pin hole 301 is provided on the moving knife 3. The first pin hole 207 and the second pin hole 301 are arranged opposite to each other. The pin 5 is located in the first pin hole 207 and the second pin hole 301. The pin 5 is a spring pin.

[0041] The moving tool 3 is provided with a positioning boss 302, which matches the shaft hole 201 and is located inside the shaft hole 201.

[0042] The rotating shaft 1 is a stepped shaft, and one end of the hub section (202) abuts against the limiting shoulder of the stepped shaft. The hub section 202 is frustoconical, and the small end of the hub section 202 is located near the moving knife 3.

[0043] The moving blade 3 has a mounting hole 303, and the other end of the rotating shaft 1 has a threaded hole 102 on its central axis. The mounting hole 303 and the threaded hole 102 are positioned opposite each other and are connected to the threaded hole 102 by a screw 6 passing through the mounting hole 303 and threadedly connected to it, thereby fixing the moving blade 3 and the rotating shaft 1 together.

[0044] Example 2 is an application of Example 1, specifically as follows: Figure 6 , 7As shown in Figure 8, a vacuum pump includes a pump housing 7, which has a cavity 703 inside. The pump housing 7 is provided with an inlet 701 and an outlet 702 communicating with the cavity 703. A deflection-controllable crushing component as described above is rotatably installed inside the cavity 703. The rotating shaft 1 of the crushing component is connected to an external motor 9 for transmission.

[0045] When the aforementioned deflection-controllable crushing component and its vacuum pump are in use, an extension section is extended from the hub section of the spiral blade 2. The extension section protrudes from the rotating shaft 1 and is matched with the mounting plate 206 at one end of the extension section, so that the crushing component as a whole is balanced when rotating at high speed, thereby reducing the influence of the entire crushing component on the deflection deformation and avoiding the phenomenon of radial runout under high-speed rotation.

[0046] The above description, based on the preferred embodiments of this utility model, provides inspiration. Those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification but must be determined according to the claims.

Claims

1. A deflection-controllable crushing assembly, comprising a rotating shaft (1), a helical blade (2), and a moving cutter (3), wherein the helical blade (2) is provided with a shaft hole (201) matching the rotating shaft (1), and one end of the rotating shaft (1) is disposed in the shaft hole (201), characterized in that: The helical blade (2) includes a hub section (202) and an extension section (203) disposed at one end of the hub section (202). A blade (204) is disposed on the outer circumferential surface of the hub section (202). One end of the hub section (202) abuts against the rotating shaft (1). A first radial limiting mechanism is disposed between the hub section (202) and the rotating shaft (1). The extension section (203) extends axially along the helical blade (2) and protrudes from one end of the rotating shaft (1). A moving blade (3) is disposed on the extension section (203). A second radial limiting mechanism is disposed between the moving blade (3) and the extension section (203). The moving blade (3) and the rotating shaft (1) have a gap and are fixedly connected to each other.

2. The deflection-controlled crushing assembly of claim 1, wherein: The first radial limiting mechanism includes a first keyway (101) opened on the rotating shaft (1), and a second keyway (205) opened on the inner peripheral wall of the shaft hole (201). The first keyway (101) and the second keyway (205) correspond to each other, and a matching key (4) is provided in the first keyway (101) and the second keyway (205).

3. The deflection-controlled crushing assembly of claim 1, wherein: The extension section (203) is provided with a mounting plate (206) at the end away from the hub section (202).

4. The deflection-controllable crushing assembly of claim 3, wherein: The second radial limiting mechanism includes a pin (5), a first pin hole (207) is provided on the end face of the mounting plate (206), and a second pin hole (301) is provided on the moving knife (3). The first pin hole (207) and the second pin hole (301) are arranged opposite to each other, and the pin (5) is located in the first pin hole (207) and the second pin hole (301).

5. The deflection-controllable crushing assembly of claim 4, wherein: The pin (5) is a spring pin.

6. The deflection-controllable crushing component according to claim 1, characterized in that: The moving blade (3) is provided with a positioning boss (302), which matches the shaft hole (201) and is located inside the shaft hole (201).

7. The deflection-controllable crushing assembly of claim 1, wherein: The rotating shaft (1) is a stepped shaft, and one end of the hub section (202) abuts against the limiting shoulder of the stepped shaft.

8. The deflection-controllable crushing assembly of claim 1, wherein: The moving blade (3) has a mounting hole (303), and the other end of the rotating shaft (1) has a threaded hole (102) on its central axis. The mounting hole (303) and the threaded hole (102) are positioned opposite each other and are connected to the threaded hole (102) by a screw (6) passing through the mounting hole (303) and threadedly connected to it, thereby fixing the moving blade (3) and the rotating shaft (1) together.

9. The deflection-controllable crushing assembly of claim 1, wherein: The hub section (202) is frustoconical, and the small end of the hub section (202) is located near the moving blade (3).

10. A vacuum pump characterized by: It is equipped with a deflection-controlled crushing component as described in any one of claims 1-9.

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