An open rotary feeder and a method for adjusting the gap between the impeller and the end cover.

Abstract

This invention belongs to the field of feeder technology, specifically relating to an open rotary feeder and a method for adjusting the gap between the impeller and the end cover. The open rotary feeder includes a housing, an end cover, an extended end cover, and a rotor. The rotor includes an impeller and a rotating shaft. A single-row cylindrical roller bearing, an elastic bearing retainer, and a double-direction thrust ball bearing are installed inside the extended end cover. A round nut is installed on the side of the double-direction thrust ball bearing away from the rotor. The beneficial technical effects of this invention are: (1) Pushing the end of the rotating shaft where the round nut is installed causes a slight axial movement of the rotating shaft. The cylindrical roller bearing is located at the inner end of the mounting cavity and does not move. The elastic bearing retainer is compressed. At the same time, the rotating shaft of the rotor drives the impeller to move axially. During this process, the gap between the impeller and the extended end cover increases. (2) By controlling the thickness of the bearing washer and the machining accuracy, the fixed distance of the round nut rotation is adjusted, which facilitates quick and accurate adjustment of the installation gap between the impeller and the end cover of multiple identical feeders, thereby improving production efficiency.

Description

Technical Field

[0001] This invention belongs to the field of feeder technology, specifically relating to an open rotary feeder and a method for adjusting the gap between the impeller and the end cover. Background Technology

[0002] Open rotary feeders, also known as rotary feed valves or star-shaped unloaders, are specialized devices used in powder conveying systems for unloading, metering, dust removal, and quantitative conveying. They primarily function as sealants, unloaders, and airlocks, playing a crucial role in powder conveying systems. During operation, the impeller rotates within the housing. Gaps exist between the left and right end faces of the impeller and the end covers to prevent material from entering the feeder, either through sealing devices or bearings. The size of these gaps needs to be controlled through machining precision and installation. The gap at one end ranges from 0.05mm to 0.15mm, and the total gap between the two ends ranges from 0.10mm to 0.30mm. The feeder gap varies depending on the model and material characteristics.

[0003] The existing open feeder is difficult to adjust the installation gap, the adjustment range is hard to control and the error is large. If the gap at one end of the equipment is not within the range, the end cover needs to be disassembled and reinstalled, which reduces work efficiency. If too many disassemblies and reassemblies are performed, the star-shaped seal ring and locking nut will be damaged, affecting product quality. Summary of the Invention

[0004] This invention addresses the problem that adjusting the installation gap between the left and right end faces and the end cover of the open feeder is difficult and the adjustment range is hard to control. It provides a method for adjusting the impeller, end cover, and gap of an open rotary feeder.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is an open rotary feeder, comprising a housing and a rotor, wherein a feeding chamber is provided inside the housing, and side ports communicating with the feeding chamber are provided on both sides of the housing, and a rotor is installed inside the feeding chamber, wherein the rotor comprises an impeller and a rotating shaft;

[0006] The two side ports are respectively fitted with end caps and extended end caps, and the two ends of the rotating shaft are respectively installed in the end caps and extended end caps. The impeller is installed on the rotating shaft. An installation cavity is opened in the extended end cap, and a single-row cylindrical roller bearing, an elastic bearing retaining ring, a double-direction thrust ball bearing and a round nut are installed in the installation cavity from the inside to the outside.

[0007] The double-direction thrust ball bearing includes two races and a centrally protruding shaft race. The two races are race one and race two, with race two located on the impeller side of the double-direction thrust ball bearing. The shaft has a shoulder at a position corresponding to race two and the shaft race of the double-direction thrust ball bearing. A bearing positioning sleeve is installed between race one and the corresponding portion of the shaft, with the outer circumference of the bearing positioning sleeve contacting the inner surface of race one of the double-direction thrust ball bearing. The end of the bearing positioning sleeve near the impeller abuts against the protruding portion of the shaft race of the double-direction thrust ball bearing. The round nut is threaded to the external thread at the end of the shaft and abuts against the outer wall of the bearing positioning sleeve near the impeller side.

[0008] Preferably, the extended end cover is also equipped with a locking mechanism for locking and preventing the rotor from rolling back; the locking mechanism includes a locking nut; the locking nut has an external thread on its outer periphery, and the locking nut is threadedly connected to the extended end cover through the external thread; the locking nut abuts against the outer side wall of the race of the double-direction thrust ball bearing near the impeller.

[0009] Preferably, the locking mechanism further includes a screw; the portion of the extended end cap directly above the locking nut has a vertical threaded hole; the screw is threaded into the threaded hole of the extended end cap, and the lower end of the screw is fastened to the upper part of the locking nut.

[0010] Preferably, a drive motor for driving the rotating shaft is mounted on the end cover, and the output shaft of the drive motor is connected to the rotating shaft of the rotor via a coupling.

[0011] A method for adjusting the gap between the impeller and the end cover of an open rotary feeder includes the following steps:

[0012] Step 1: Install both ends of the rotating shaft into the end cover and the extended end cover respectively. At this time, the end of the impeller is in contact with the inner surface of the extended end cover.

[0013] Step 2: Using a hydraulic device, install the cylindrical roller bearing, elastic bearing retaining ring, double-direction thrust ball bearing, and bearing locating sleeve into the mounting cavity of the extended end cover in sequence. Rotate the round nut at the end of the shaft so that the round nut abuts against the outer wall of the bearing locating sleeve and the shaft ring of the double-direction thrust ball bearing abuts against the shoulder of the shaft.

[0014] Step 3: Use the hydraulic device to push the end of the rotating shaft with the round nut installed. The round nut and the double-direction thrust ball bearing move slightly axially with the rotating shaft. The cylindrical roller bearing is in the inner end of the mounting cavity and does not move. The elastic bearing retaining ring is compressed. At the same time, the rotor shaft drives the impeller to move axially. During this process, the gap between the impeller and the extended end cover increases until the design requirements are met.

[0015] Preferably, the process also includes step four, in which the locking nut is tightened until it presses against the outer side of the race of the double-direction thrust ball bearing near the impeller; then the upper part of the locking nut is secured with the lower end of a screw.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0017] Compared to existing technologies, the open rotary feeder of the present invention,

[0018] (1) The end of the rotating shaft with the round nut installed is driven by the hydraulic device. The round nut and the double-direction thrust ball bearing move slightly axially with the rotating shaft. The cylindrical roller bearing is located in the inner end of the mounting cavity and does not move. The elastic bearing retaining ring is compressed. At the same time, the rotating shaft of the rotor drives the impeller to move axially. During this process, the gap between the impeller and the extended end cover increases until the design requirements are met.

[0019] (2) By controlling the thickness and machining accuracy of the bearing gaskets, it is easy for workers to quickly and accurately adjust the installation gap between the impeller and the end cover of multiple open rotary feeders with the same structure and size, thereby improving production efficiency and reducing production costs.

[0020] (3) The locking mechanism inside the extended end cover also works with locking nuts and screws to lock and prevent the rotor from rolling back. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below:

[0022] Figure 1 This is a schematic diagram of an open rotary feeder.

[0023] Figure 2 This is a front view of an open rotary feeder.

[0024] Figure 3 This is a side view of the open rotary feeder.

[0025] Figure 4 This is a schematic diagram of the rotor structure of an open rotary feeder.

[0026] Figure 5 This is a schematic diagram of the locking mechanism of an open rotary feeder.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1—Shell;

[0029] 2—End cap; 201—Locking mechanism; 202—Extended end cap; 203—Locking nut; 204—Screw;

[0030] 3—Rotor; 301—Impeller; 302—Shaft; 303—Drive motor;

[0031] 4—Feeding chamber; 5—Side port; 6—Single row cylindrical roller bearing;

[0032] 7—Elastic bearing retaining ring; 8—Double-direction thrust ball bearing; 9—Round nut; 10—Bearing positioning sleeve. Detailed Implementation

[0033] To better understand the above-mentioned objectives, features and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0035] Example 1

[0036] The invention will be further described below with reference to the accompanying drawings. An open rotary feeder, such as... Figures 1-4 As shown, it includes a housing 1 and a rotor 3. A feeding chamber 4 is opened inside the housing 1. Side ports 5 communicating with the feeding chamber 4 are opened on both sides of the housing 1. The rotor 3 is installed inside the feeding chamber 4. The rotor 3 includes an impeller 301 and a rotating shaft 302.

[0037] like Figure 1 and Figure 2 As shown, end cap 2 and extended end cap 202 are respectively installed on the two side ports 5. The two ends of the rotating shaft 302 are respectively installed in the end cap 2 and extended end cap 202. The impeller 301 is installed on the rotating shaft 302. An installation cavity is opened in the extended end cap 202. A single row cylindrical roller bearing 6, an elastic bearing retaining ring 7, a double-direction thrust ball bearing 8 and a round nut 9 are installed in the installation cavity from the inside to the outside.

[0038] like Figure 1 As shown, the double-direction thrust ball bearing 8 includes two races and a shaft ring protruding inward in the middle. The two races are race one and race two, with race two located on the side of the double-direction thrust ball bearing 8 near the impeller 301. The shaft 302 has a shoulder at a position corresponding to race two and the shaft ring of the double-direction thrust ball bearing 8. A bearing positioning sleeve 10 is installed between race one of the double-direction thrust ball bearing 8 and the corresponding part of the shaft 302. The outer periphery of the bearing positioning sleeve 10 contacts the inner surface of race one of the double-direction thrust ball bearing 8. The end of the bearing positioning sleeve 10 near the impeller 301 abuts against the protruding part of the shaft ring of the double-direction thrust ball bearing 8. The round nut 9 is threadedly connected to the external thread at the end of the shaft 302 and abuts against the outer wall of the bearing positioning sleeve 10 near the impeller 301.

[0039] like Figure 1 and Figure 5 As shown, the extended end cover 202 is also equipped with a locking mechanism 201 for locking and preventing the rotor 3 from retracting; the locking mechanism 201 includes a locking nut 203; the locking nut 203 has an external thread on its outer periphery, and the locking nut 203 is threadedly connected to the extended end cover 202 through the external thread; the locking nut 203 abuts against the outer side wall of the race of the double-direction thrust ball bearing 8 near the impeller 301.

[0040] like Figure 1 and Figure 5 As shown, the locking mechanism 201 also includes a screw 204; the extended end cap 202 is provided with a vertical threaded hole at the part directly above the locking nut 203; the screw 204 is threadedly connected to the threaded hole of the extended end cap 202, and the lower end of the screw 204 is fastened to the upper part of the locking nut 203.

[0041] like Figure 2 As shown, a drive motor 303 for driving the rotating shaft 302 is installed on the end cover 2, and the output shaft of the drive motor 303 is connected to the rotating shaft 302 of the rotor 3 through a coupling.

[0042] A method for adjusting the gap between the impeller and the end cover of an open rotary feeder, comprising the following steps:

[0043] Step 1: Install both ends of the rotating shaft 302 into the end cover 2 and the extended end cover 202 respectively. At this time, the end of the impeller 301 is in contact with the inner surface of the extended end cover 202.

[0044] Step 2: Using a hydraulic device, install the cylindrical roller bearing 6, the elastic bearing retaining ring 7, the double-direction thrust ball bearing 8, and the bearing positioning sleeve 10 into the mounting cavity of the extended end cover 202 in sequence. Rotate the round nut 9 at the end of the rotating shaft 302 so that the round nut 9 abuts against the outer wall of the bearing positioning sleeve 10 and the shaft ring of the double-direction thrust ball bearing 8 abuts against the shoulder of the rotating shaft 302.

[0045] Step 3: Using a hydraulic device, the end of the rotating shaft 302 with the round nut 9 installed is pushed. The round nut 9 and the double-direction thrust ball bearing 8 move slightly axially with the rotating shaft 302. The cylindrical roller bearing 6 is located at the inner end of the mounting cavity and does not move. The elastic bearing retaining ring 7 is compressed. At the same time, the rotating shaft 302 of the rotor 3 drives the impeller 301 to move axially. During this process, the gap between the impeller 301 and the extended end cover 202 increases until the design requirements are met.

[0046] Step 4: Tighten the locking nut 203 until it presses against the outer side of the race of the double-direction thrust ball bearing 8 near the impeller 301; then tighten the upper part of the locking nut 203 with the lower end of the screw 204.

[0047] Meanwhile, this invention uses the end face of the extended end cover 202 that mates with the rotor 3 as a reference to calculate the distance between the shoulder of the rotating shaft 302 and the end face of the single-row cylindrical roller bearing 6. Furthermore, both the single-row cylindrical roller bearing 6 and the double-direction thrust ball bearing 8 adopt standard dimensions and have standard thicknesses. Therefore, the bearing washer thickness corresponding to a certain clearance value can be calculated. By controlling the thickness and machining accuracy of the bearing washer, the axial movement distance of the rotating shaft 302 can be adjusted, thereby adjusting the clearance at one end of the feeder to a fixed value. Then, the clearance at the other end can be easily obtained due to the constant total clearance and controllable machining accuracy. This facilitates workers to quickly and accurately adjust the installation clearance between the impeller 301 and the end cover 2 of multiple open rotary feeders with the same internal structure and dimensions.

[0048] Compared to existing technologies, the original feeder has a structure with a cylindrical roller bearing 6 and a locking nut 203 at both ends. The present invention improves one end to an extended end cap 202, which is more reasonable. When adjusting the gap, it is only necessary to push the end of the rotating shaft 302 inside the extended end cap 202 to determine the appropriate gap, which reduces the factors that cause errors. In addition, the locking mechanism 201 inside the extended end cap 202 also works with the locking nut 203 and the screw 204 to achieve the effect of locking and preventing backlash.

[0049] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments that can be applied to other fields. However, any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. An open rotary feeder, comprising a housing (1) and a rotor (3), wherein a feeding chamber (4) is provided inside the housing (1), and side ports (5) communicating with the feeding chamber (4) are provided on both sides of the housing (1), and the rotor (3) is installed inside the feeding chamber (4), wherein the rotor (3) comprises an impeller (301) and a rotating shaft (302), characterized in that, The two side ports (5) are respectively fitted with end caps (2) and extended end caps (202). The two ends of the shaft (302) are respectively installed in the end caps (2) and extended end caps (202). The impeller (301) is installed on the shaft (302). An installation cavity is provided in the extended end cap (202). A single-row cylindrical roller bearing (6), an elastic bearing retaining ring (7), a double-direction thrust ball bearing (8) and a round nut (9) are installed in the installation cavity from the inside to the outside. The double-direction thrust ball bearing (8) includes two races and a shaft ring protruding inward in the middle. The two races are race one and race two, with race two located on the side of the double-direction thrust ball bearing (8) near the impeller (301). The shaft (302) has a shoulder at a position corresponding to race two and the shaft ring of the double-direction thrust ball bearing (8). A bearing positioning sleeve (10) is installed between race one of the double-direction thrust ball bearing (8) and the corresponding part of the shaft (302). The outer periphery of the bearing positioning sleeve (10) contacts the inner surface of race one of the double-direction thrust ball bearing (8). The end of the bearing positioning sleeve (10) near the impeller (301) abuts against the protruding part of the shaft ring of the double-direction thrust ball bearing (8). The round nut (9) is threaded to the external thread at the end of the shaft (302) and abuts against the outer wall of the bearing positioning sleeve (10) near the impeller (301). The extended end cover (202) is also equipped with a locking mechanism (201) for locking and preventing the rotor (3) from rolling back; the locking mechanism (201) includes a locking nut (203); the locking nut (203) has an external thread on its outer periphery, and the locking nut (203) is threaded to the extended end cover (202) through the external thread; the locking nut (203) abuts against the outer side wall of the race of the double-direction thrust ball bearing (8) near the impeller (301); The locking mechanism (201) also includes a screw (204); the extended end cap (202) has a vertical threaded hole on the part directly above the locking nut (203); the screw (204) is threadedly connected to the threaded hole of the extended end cap (202), and the lower end of the screw (204) is fastened to the upper part of the locking nut (203).

2. The open rotary feeder according to claim 1, characterized in that, A drive motor (303) for driving the rotating shaft (302) to rotate is installed on the end cover (2), and the output shaft of the drive motor (303) is connected to the rotating shaft (302) of the rotor (3) through a coupling.

3. A method for adjusting the gap between the impeller and the end cover of an open rotary feeder, characterized in that, Adjusting the gap between the impeller and the end cover of the open rotary feeder as described in claim 1 includes the following steps: Step 1: Install both ends of the rotating shaft (302) into the end cover (2) and the extended end cover (202) respectively. At this time, the end of the impeller (301) is attached to the inner surface of the extended end cover (202). Step 2: Using a hydraulic device, install the single-row cylindrical roller bearing (6), the elastic bearing retaining ring (7), the double-direction thrust ball bearing (8), and the bearing positioning sleeve (10) into the mounting cavity of the extended end cover (202) in sequence. Rotate the round nut (9) at the end of the shaft (302) so that the round nut (9) abuts against the outer wall of the bearing positioning sleeve (10) and the shaft ring of the double-direction thrust ball bearing (8) abuts against the shoulder of the shaft (302). Step 3: Using a hydraulic device, the end of the rotating shaft (302) with the round nut (9) installed is pushed. The round nut (9) and the double-direction thrust ball bearing (8) move slightly axially with the rotating shaft (302). The single-row cylindrical roller bearing (6) is located at the inner end of the mounting cavity and does not move. The elastic bearing retaining ring (7) is compressed. At the same time, the rotating shaft (302) of the rotor (3) drives the impeller (301) to move axially. During this process, the gap between the impeller (301) and the extended end cover (202) increases until the design requirements are met.

4. The method for adjusting the gap between the impeller and the end cover of the open rotary feeder according to claim 3, characterized in that, It also includes step four, in which the locking nut (203) is turned until the locking nut (203) is close to the impeller (301) and presses against the outer side wall of the race of the double-direction thrust ball bearing (8); then the upper part of the locking nut (203) is nailed with the lower end of the screw (204).

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