Rotor adjusting device for short-path distiller

Abstract

The utility model relates to a rotor adjusting device for a short-path distiller, which belongs to the technical field of short-path distillers and comprises a rotor bottom flange and a plurality of adjusting mechanisms, the axis of the rotor bottom flange is vertically arranged, the plurality of adjusting mechanisms are circumferentially distributed by taking the axis of the rotor bottom flange as the center, and each adjusting mechanism is connected with the rotor bottom flange; the adjusting mechanism comprises a pin shaft and a roller, the roller is vertically arranged below a bottom flange of the rotor, the pin shaft and the roller are coaxially arranged, the ceramic bearing is arranged in the device to meet the using working condition, radial and axial runout of the rotor in the rotating process is reduced, and then the service life of the ceramic bearing is prolonged. The polyether-ether-ketone shaft sleeve abuts against the outer peripheral wall of the built-in fixing shaft to buffer the internal connecting bearing, radial and axial runout of the rotor in the rotating process is further reduced, in addition, positioning can be achieved through radial fine adjustment of the pin shaft and the rotor bottom flange, and the effect of avoiding runout of the rotor in the rotating process is achieved.

Description

Technical Field

[0001] This utility model relates to a rotor adjustment device for a short-path distillation apparatus, belonging to the technical field of short-path distillation apparatus. Background Technology

[0002] Short-path distillation is a separation and purification technology performed under high vacuum conditions, widely used in laboratory purification, new materials, and pharmaceuticals. The short-path still is the main equipment in this technology. The liquid material is first distributed onto the evaporation wall by a distributor. Under the scraping action of the rotating rotor, the liquid material is spread into a uniform thin film on the evaporation wall. The more uniform the distribution of the liquid material on the evaporation surface, the higher the separation efficiency. The rotor structure plays a decisive role in the uniformity of the film formation; therefore, the rotor structure directly affects the separation efficiency of the equipment and is the core component of the short-path still.

[0003] Chinese utility model patent CN207429727U discloses a scraped-film short-path distillation rotor structure, including a rotating shaft, a distributor, a rotating frame, and a scraper. The rotating shaft is concentrically and rigidly connected to the distributor. The rotating frame includes a semi-circular guide groove and a fixing ring. The top of the semi-circular guide groove is welded and fixed to the bottom of the distributor. The scraper is a cylindrical roller, each roller installed in an outward-facing semi-circular guide groove, allowing the rollers to slide freely within the groove. The fixing ring is welded to the bottom of the semi-circular guide groove, supporting the rollers and securing the grooves together. As the rotor rotates, the scraper, under centrifugal force, is radially thrown onto the evaporation surface along the semi-circular guide groove. The scraper rotates on its own axis and moves in a circular motion with the rotor, rolling the material onto the evaporation surface to form a uniform thin film, ensuring thorough mixing and good heat exchange, thus improving distillation efficiency. This utility model has a simple structure, reasonable design, and is easy to install, maintain, and clean. However, in the existing technology, the rotor is prone to jumping during rotation, which leads to uneven material distribution. This results in some materials being insufficiently or excessively heated, thereby affecting the separation effect of each component and reducing the separation purity.

[0004] Therefore, there is a need for a rotor adjustment device for short-path distillers to prevent the rotor from jumping during rotation. Utility Model Content

[0005] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, to provide a rotor adjustment device for a short-path distillation apparatus that avoids jumping during rotor rotation.

[0006] The technical solution adopted by this utility model to solve the above problems is as follows: a rotor adjustment device for a short-range distillation apparatus, including a rotor bottom flange and multiple adjustment mechanisms. The axis of the rotor bottom flange is arranged vertically, and the multiple adjustment mechanisms are distributed circumferentially around the axis of the rotor bottom flange. Each adjustment mechanism is connected to the rotor bottom flange.

[0007] The adjusting mechanism includes a pin and a roller. The roller is vertically positioned below the rotor bottom flange. The pin is coaxially arranged with the roller and passes through the rotor bottom flange. The pin and the rotor bottom flange are in clearance fit in the horizontal direction. The roller contains a first positioning sleeve and two connecting bearings. The two connecting bearings are distributed vertically. The first positioning sleeve is located between the two connecting bearings. The inner ring of the connecting bearing is mounted on the outer peripheral wall of the pin, and the outer ring of the connecting bearing is mounted on the inner peripheral wall of the roller. The two ends of the first positioning sleeve abut against the inner rings of the two connecting bearings, respectively.

[0008] A second positioning sleeve is coaxially inserted into the top of the roller. The second positioning sleeve is sleeved on the pin. The second positioning sleeve abuts against the bottom of the rotor bottom flange and the top of the inner ring of the connecting bearing, respectively.

[0009] The pin is provided with a flange, which abuts against the bottom of the inner ring of the lower connecting bearing;

[0010] An adjusting ring is coaxially sleeved on the pin, and the adjusting ring abuts against the bottom of the flange;

[0011] The outer wall of the adjusting ring is fixedly fitted with a connecting plate, and two anti-loosening nuts are threadedly connected to the pin. The two anti-loosening nuts abut against the top of the rotor bottom flange and the bottom of the adjusting ring, respectively, so as to lock the pin to the rotor bottom flange.

[0012] A bushing is fitted on the outer peripheral wall of the roller.

[0013] Preferably, a gap is provided between the first positioning sleeve and the inner peripheral wall of the roller.

[0014] Preferably, a first sealing ring is provided between the second positioning sleeve and the inner wall of the roller.

[0015] Preferably, the second positioning sleeve is connected to the top of the roller by a pressure plate, which is located above the first sealing ring.

[0016] Preferably, the top of the pressure plate is inclined.

[0017] Preferably, the pressure plate is threadedly connected to the second positioning sleeve and the roller respectively.

[0018] Preferably, a second sealing ring is provided at the connection between the pressure plate and the roller.

[0019] Preferably, the bushing is made of polyetheretherketone (PEEK).

[0020] Preferably, the connecting bearing is a ceramic bearing.

[0021] Compared with the prior art, the advantages of this utility model are:

[0022] This utility model discloses a rotor adjustment device for a short-path distillation apparatus. By employing ceramic bearings inside the equipment to meet operating conditions, it reduces radial and axial runout of the rotor during rotation. Secondly, the polyetheretherketone bushing abuts against the outer peripheral wall of the built-in fixed shaft, which buffers the internal connecting bearings, further reducing radial and axial runout of the rotor during rotation. In addition, positioning can be achieved through radial fine-tuning of the pin and the rotor bottom flange, thus preventing runout during rotor rotation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the working state structure of a rotor adjustment device for a short-path distillation apparatus according to the present invention;

[0024] Figure 2 A schematic diagram showing the connection structure between the rotor bottom flange and the adjusting mechanism;

[0025] Figure 3 for Figure 2 Enlarged view of part A.

[0026] in:

[0027] 1. Rotor bottom flange; 2. Adjustment mechanism; 3. Rotor; 4. Drive shaft; 5. Internal fixed shaft

[0028] Pin 201, roller 202, first positioning sleeve 203, connecting bearing 204, second positioning sleeve 205, first sealing ring 206, pressure plate 207, second sealing ring 208, flange 209, adjusting ring 210, connecting plate 211, anti-loosening nut 212, bushing 213. Detailed Implementation

[0029] like Figure 1-3 As shown, a rotor adjustment device for a short-range distiller in this embodiment includes a rotor bottom flange 1 and multiple adjustment mechanisms 2. The rotor bottom flange 1 is arranged vertically along its axis, and the multiple adjustment mechanisms 2 are evenly distributed circumferentially around the axis of the rotor bottom flange 1. Each adjustment mechanism 2 is connected to the rotor bottom flange 1.

[0030] The adjusting mechanism 2 includes a pin 201 and a roller 202. The roller 202 is vertically arranged below the rotor bottom flange 1. The pin 201 is coaxially arranged with the roller 202 and passes through the rotor bottom flange 1. The pin 201 and the rotor bottom flange 1 are in a horizontal clearance fit. A first positioning sleeve 203 and two connecting bearings 204 are provided inside the roller 202. The two connecting bearings 204 are distributed vertically. The first positioning sleeve 203 is located between the two connecting bearings 204. The inner ring of the connecting bearing 204 is mounted on the outer peripheral wall of the pin 201. The outer ring is installed on the inner circumferential wall of the roller 202. A gap is provided between the first positioning sleeve 203 and the inner circumferential wall of the roller 202. The two ends of the first positioning sleeve 203 abut against the inner rings of the two connecting bearings 204 respectively. The oil gap of the two connecting bearings 204 is adjusted by the first positioning sleeve 203. The connecting bearings 204 are ceramic bearings. Ceramic bearings have low lubrication requirements and can operate without lubrication. They also have excellent corrosion resistance and pressure resistance to ensure the normal operation of the equipment. Ceramic materials have advantages such as high hardness, wear resistance, and low coefficient of thermal expansion, which can reduce the radial and axial runout of the rotor 3 during rotation.

[0031] A second positioning sleeve 205 is coaxially inserted into the top end of the roller 202. The second positioning sleeve 205 is fitted onto the pin 201. The second positioning sleeve 205 abuts against the bottom of the rotor bottom flange 1 and the top of the inner ring of the upper connecting bearing 204, respectively. A first sealing ring 206 is provided between the second positioning sleeve 205 and the inner wall of the roller 202. The first sealing ring 206 serves as a pressure-bearing seal to prevent material from entering the internal cavity of the roller 202.

[0032] The second positioning sleeve 205 is connected to the top of the roller 202 by a pressure plate 207. The pressure plate 207 is located above the first sealing ring 206. The top of the pressure plate 207 is inclined. The pressure plate 207 is threadedly connected to the second positioning sleeve 205 and the roller 202 respectively. A second sealing ring 208 is provided at the connection between the pressure plate 207 and the roller 202. The inclined surface on the pressure plate 207 helps to prevent material accumulation.

[0033] The pin 201 is provided with a flange 209, which abuts against the bottom of the inner ring of the lower connecting bearing 204 to achieve axial positioning of the connecting bearing 204 and resist impact.

[0034] The pin 201 is provided with an adjusting ring 210 on the coaxial sleeve 213, and the adjusting ring 210 abuts against the bottom of the flange 209;

[0035] The outer wall of the adjusting ring 210 is fixedly fitted with a connecting plate 211. Two anti-loosening nuts 212 are threadedly connected to the pin 201. The two anti-loosening nuts 212 abut against the top of the rotor bottom flange 1 and the bottom of the adjusting ring 210 respectively. The pin 201 and the rotor bottom flange 1 are locked by the two anti-loosening nuts 212.

[0036] A bushing 213 is fitted on the outer peripheral wall of the roller 202, and the bushing 213 is made of polyetheretherketone.

[0037] During operation, rotor 3 is mounted on rotor bottom flange 1. Rotation of rotor 3 is driven by the rotation of drive shaft 4 inside the short-path distiller. Rotation of rotor 3 drives the adjustment device to rotate synchronously. The drive shaft 4 and the built-in fixed shaft 5 inside the short-path distiller are coaxially arranged with rotor bottom flange 1. The outer peripheral wall of bushing 213 abuts against the outer peripheral wall of built-in fixed shaft 5, realizing rolling friction between bushing 213 and built-in fixed shaft 5. Because polyetheretherketone material has high temperature resistance, wear resistance, chemical stability, high precision, long service life, and high manufacturing precision, it can meet the requirements of high-precision transmission and positioning. It plays a buffering role for the internal connecting bearing 204, further reducing the radial and axial runout of rotor 3 during rotation.

[0038] During this period, positioning can be achieved by radial fine adjustment of the pin 201 and the rotor bottom flange 1, and the adjustment gap needs to take into account the tolerance value in the machining and manufacturing process, so as to avoid the rotor 3 from jumping during rotation.

[0039] In summary, by using ceramic bearings inside the equipment to meet the operating conditions, the radial and axial runout of the rotor 3 during rotation is reduced. Secondly, the polyetheretherketone bushing 213 abuts against the outer peripheral wall of the built-in fixed shaft 5, which acts as a buffer for the internal connecting bearing 204, further reducing the radial and axial runout of the rotor 3 during rotation. In addition, the positioning can be achieved by radial fine adjustment of the pin 201 and the rotor bottom flange 1, which helps to prevent the rotor 3 from running during rotation.

[0040] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. A rotor adjusting device for a short-path distillation apparatus, characterized in that: It includes a rotor bottom flange (1) and multiple adjustment mechanisms (2). The axis of the rotor bottom flange (1) is arranged vertically, and the multiple adjustment mechanisms (2) are distributed circumferentially around the axis of the rotor bottom flange (1). Each adjustment mechanism (2) is connected to the rotor bottom flange (1). The adjusting mechanism (2) includes a pin (201) and a roller (202). The roller (202) is vertically arranged below the rotor bottom flange (1). The pin (201) is coaxially arranged with the roller (202). The pin (201) passes through the rotor bottom flange (1). The pin (201) and the rotor bottom flange (1) are in clearance fit in the horizontal direction. The roller (202) is provided with a first positioning sleeve (203) and two connecting bearings (204). The two connecting bearings (204) are distributed vertically. The first positioning sleeve (203) is located between the two connecting bearings (204). The inner ring of the connecting bearing (204) is installed on the outer peripheral wall of the pin (201). The outer ring of the connecting bearing (204) is installed on the inner peripheral wall of the roller (202). The two ends of the first positioning sleeve (203) abut against the inner rings of the two connecting bearings (204) respectively. A second positioning sleeve (205) is coaxially inserted into the top of the roller (202). The second positioning sleeve (205) is sleeved on the pin (201). The second positioning sleeve (205) abuts against the bottom of the rotor bottom flange (1) and the top of the inner ring of the upper connecting bearing (204). A flange (209) is provided on the pin (201), and the flange (209) abuts against the bottom of the inner ring of the lower connecting bearing (204); The pin (201) is provided with an adjusting ring (210) on a coaxial sleeve (213), and the adjusting ring (210) abuts against the bottom of the flange (209); The outer wall of the adjusting ring (210) is fixedly fitted with a connecting plate (211), and two anti-loosening nuts (212) are threadedly connected to the pin (201). The two anti-loosening nuts (212) abut against the top of the rotor bottom flange (1) and the bottom of the adjusting ring (210) respectively, and the pin (201) and the rotor bottom flange (1) are locked by the two anti-loosening nuts (212). A bushing (213) is fitted on the outer peripheral wall of the roller (202).

2. The rotor adjusting device for a short-path distillation apparatus according to claim 1, characterized in that: A gap is provided between the first positioning sleeve (203) and the inner peripheral wall of the roller (202).

3. The rotor adjusting device for a short-path distillation apparatus according to claim 1, characterized in that: A first sealing ring (206) is provided between the second positioning sleeve (205) and the inner wall of the roller (202).

4. A rotor adjusting device for a short-path distillation apparatus according to claim 2, characterized in that: The second positioning sleeve (205) is connected to the top of the roller (202) by a pressure plate (207), which is located above the first sealing ring (206).

5. A rotor adjusting device for a short-path distillation apparatus according to claim 3, characterized in that: The top of the pressure plate (207) is inclined.

6. A rotor adjusting device for a short-path distillation apparatus according to claim 3, characterized in that: The pressure plate (207) is threadedly connected to the second positioning sleeve (205) and the roller (202) respectively.

7. A rotor adjusting device for a short-path distillation apparatus according to claim 3, characterized in that: A second sealing ring (208) is provided at the connection between the pressure plate (207) and the roller (202).

8. A rotor adjusting device for a short-path distillation apparatus according to claim 1, characterized in that: The bushing (213) is made of polyetheretherketone.

9. A rotor adjusting device for a short-path distillation apparatus according to claim 1, characterized in that: The connecting bearing (204) is a ceramic bearing.

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