High pressure mvr vapor compressor

Abstract

The utility model belongs to steam compressor technical field, concretely is a kind of high-pressure MVR steam compressor, supporting base and fixed installation in the driving motor of supporting base upper end one side center, the output end of driving motor is connected with driving shaft, the port of driving shaft is connected with speed-increasing gearbox coupling, driving shaft is connected with driving acceleration mechanism by speed-increasing gearbox coupling;The utility model is through the meshing of big gear, primary transmission gear, secondary transmission gear and pinion in speed-increasing gearbox in proper order, forms two-stage speed-increasing structure, accelerates the output rotational speed of driving motor, and can be efficiently transmitted to compressor ontology, so that rotary impeller can obtain enough fast linear velocity, effectively work on the low-temperature steam of suction, to compress it into high-temperature high-pressure steam, so that the temperature, pressure and enthalpy of steam can accurately match the heat source demand of evaporation system, without additional external heat energy, it can be directly used for evaporation system, improve energy-saving effect.

Description

Technical Field

[0001] This utility model belongs to the field of steam compressor technology, specifically a high-pressure MVR steam compressor. Background Technology

[0002] The high-pressure MVR steam compressor is a core device in an energy-saving evaporation system. It adiabatically compresses the low-temperature secondary steam generated by the evaporation system to increase its temperature, pressure, and enthalpy, and then sends it back to the heating side of the evaporator as a heat source. This significantly reduces the system's dependence on external live steam, achieving energy saving and consumption reduction. It is widely used in chemical, pharmaceutical, food processing, wastewater treatment and other fields.

[0003] However, existing high-pressure MVR steam compressors have certain limitations in actual operation, especially under high-pressure conditions. Their single-shaft drive mechanism is insufficient to provide enough power to rotate the impeller, resulting in the inability to maintain the high-pressure compression state of the steam. This not only affects the operating efficiency of the equipment but also the energy-saving effect. Summary of the Invention

[0004] The purpose of this invention is to provide a high-pressure MVR steam compressor to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solutions: A high-pressure MVR steam compressor includes: a support base and a drive motor fixedly installed at the center of one side of the upper end of the support base. The output end of the drive motor is connected to a drive shaft, the output end of the drive shaft is connected to a speed increaser coupling, and the drive shaft is connected to a drive acceleration mechanism through the speed increaser coupling. The drive acceleration mechanism includes a speed-increasing gearbox. Inside the speed-increasing gearbox, a drive shaft, a transmission shaft, and a high-speed shaft are rotatably mounted in sequence. A large gear is fixedly mounted on the drive shaft. A first transmission gear and a second transmission gear are fixedly mounted on the transmission shaft. A small gear is fixedly mounted on the high-speed shaft. The large gear meshes with the first transmission gear, and the second transmission gear meshes with the small gear. The drive acceleration mechanism is connected to a power transmission mechanism via the high-speed shaft. The power transmission mechanism is connected to the compressor body. The drive acceleration mechanism increases the rotational speed through the speed-increasing gearbox and transmits power to the compressor body to maintain the steam in a high-pressure compressed state.

[0006] Preferably, the compressor body includes a volute fixed to the upper end of the support base on the side away from the drive motor, and a rotating shaft is rotatably mounted at the center of the inner side of the volute.

[0007] Preferably, the input end of the rotating shaft is connected to the power transmission mechanism, the output end of the rotating shaft extends into the volute, a rotating impeller is fixedly installed on the outer wall of the rotating shaft, the shaft hole of the rotating impeller is interference-fitted with the rotating shaft, and the rotating impeller rotates synchronously at high speed with the rotating shaft.

[0008] Preferably, an inlet channel is provided on the inner side of the volute near the rotating impeller, and an outlet channel is provided on the upper end of the volute. The inlet channel and outlet channel of the compressor body are respectively connected to the evaporation system. The inlet channel and outlet channel are used to draw in low-temperature secondary steam and discharge high-temperature and high-pressure steam after compression.

[0009] Preferably, the drive shaft, transmission shaft, and high-speed shaft are all rotatably mounted inside the speed-increasing gearbox via rolling bearings. The rolling bearings are angular contact ball bearings with axial load capacity, and the rolling bearings are used to prevent axial movement during gear transmission.

[0010] Preferably, the rotating impeller is a closed three-dimensional flow impeller, the support base is equipped with a shock-absorbing pad for reducing vibration during equipment operation, and the drive motor is a variable frequency motor.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention utilizes a two-stage speed-increasing structure formed by the sequential meshing of a large gear, a first transmission gear, a second transmission gear, and a small gear within a speed-increasing gearbox. This accelerates the output speed of the drive motor and efficiently transmits this speed to the compressor body, enabling the rotating impeller to achieve a sufficiently high linear velocity. This allows the impeller to effectively perform work on the inhaled low-temperature steam, compressing it into high-temperature, high-pressure steam. The steam's temperature, pressure, and enthalpy are precisely matched to the heat source requirements of the evaporation system, allowing for direct reuse of external heat energy without the need for additional external heat sources. This achieves energy recycling and improves energy efficiency. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an enlarged structural schematic diagram of the drive acceleration mechanism of this utility model; Figure 3 This is a schematic diagram of the internal structure of the drive acceleration mechanism of this utility model; Figure 4This is an enlarged structural schematic diagram of the compressor body of this utility model.

[0013] In the diagram: 1. Support base; 2. Drive motor; 21. Drive shaft; 3. Speed ​​increaser coupling; 4. Drive acceleration mechanism; 41. Speed ​​increaser gearbox; 42. Large gear; 43. Transmission shaft; 44. First transmission gear; 45. Second transmission gear; 46. High-speed shaft; 47. Small gear; 5. Power transmission mechanism; 6. Compressor body; 61. Volute; 62. Rotating shaft; 63. Rotating impeller; 64. Inlet channel; 65. Outlet channel. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0015] like Figures 1-4 As shown, a high-pressure MVR steam compressor includes: a support base 1 and a drive motor 2 fixedly installed at the center of one side of the upper end of the support base 1. The output end of the drive motor 2 is connected to a drive shaft 21, the output end of the drive shaft 21 is connected to a speed increaser coupling 3, and the drive shaft 21 is connected to a drive acceleration mechanism 4 through the speed increaser coupling 3. The drive acceleration mechanism 4 includes a speed-increasing gearbox 41. Inside the speed-increasing gearbox 41, a drive shaft 21, a transmission shaft 43, and a high-speed shaft 46 are rotatably mounted in sequence. A large gear 42 is fixedly mounted on the drive shaft 21. A first transmission gear 44 and a second transmission gear 45 are fixedly mounted on the transmission shaft 43. A small gear 47 is fixedly mounted on the high-speed shaft 46. The large gear 42 meshes with the first transmission gear 44, and the second transmission gear 45 meshes with the small gear 47. The drive acceleration mechanism 4 is connected to a power transmission mechanism 5 through the high-speed shaft 46. The power transmission mechanism 5 is connected to the compressor body 6. The drive acceleration mechanism 4 increases the speed through the speed-increasing gearbox 41 and transmits power to the compressor body 6 to maintain the steam in a high-pressure compressed state.

[0016] In practice, the support base 1 provides a stable installation foundation to ensure the rigidity of the overall equipment during operation. The drive motor 2 serves as the power source, outputting torque through the drive shaft 21. The speed increaser coupling 3 connects the drive shaft 21 and the drive acceleration mechanism 4, and compensates for possible installation errors and vibrations. The drive acceleration mechanism 4 increases the speed through gear transmission within the speed increaser gearbox 41. The speed increaser gearbox 41 provides sealing protection and an installation foundation for the gear set. The large gear 42, the first transmission gear 44, the second transmission gear 45, and the small gear 47 mesh sequentially to form a two-stage speed increaser. The transmission accelerates the output speed of the drive motor 2, solving the problem of insufficient single-shaft drive power; the high-speed shaft 46 transmits the amplified power to the compressor body 6 through the power transmission mechanism 5; the power transmission mechanism 5 is a diaphragm coupling, which mainly consists of left and right half couplings, metal diaphragm assembly, connecting bolts, key pins, and buffer pads. The left and right half couplings are respectively connected to the high-speed shaft 46 and the rotating shaft 62. The metal diaphragm assembly transmits torque while compensating for deviations. It is first tightened by connecting bolts, then circumferentially fixed by key pins, and finally damped by buffer pads. Then, power is output from the high-speed shaft 46 of the power transmission mechanism 5, which drives the left half coupling to rotate via a key connection. The left half coupling transmits torque to the right half coupling through a metal diaphragm assembly. The right half coupling then drives the rotating shaft 62 of the compressor body 6 to rotate via a key connection, thereby driving the rotating impeller 63 to rotate at high speed. This ensures that the rotating impeller 63 obtains sufficient speed, achieves efficient high-pressure compression of steam, maintains a stable high-pressure state of steam, and improves the operating efficiency and applicability of this utility model.

[0017] As a technical optimization of this utility model, the compressor body 6 includes a volute 61 fixed to the upper end of the support base 1 on the side away from the drive motor 2, and a rotating shaft 62 is rotatably installed at the center of the inner side of the volute 61. The input end of the rotating shaft 62 is connected to the power transmission mechanism 5, and the output end of the rotating shaft 62 extends into the volute 61. A rotating impeller 63 is fixedly installed on the outer wall of the rotating shaft 62. The shaft hole of the rotating impeller 63 is interference-fitted with the rotating shaft 62, and the rotating impeller 63 rotates synchronously with the rotating shaft 62 at high speed.

[0018] In practice, the volute 61 is fixed to the side of the support base 1 away from the drive motor 2, forming a reasonable layout with the drive acceleration mechanism 4 to avoid an excessively long power transmission path. The volute 61 adopts a streamlined internal cavity design, which can guide the steam flow and gradually increase the pressure, while providing protection for the rotating shaft 62 and the rotating impeller 63. The rotating shaft 62 is rotatably mounted on the inner center of the volute 61, providing a precise installation and power transmission carrier for the rotating impeller 63, ensuring structural stability during compression, and avoiding steam leakage or a decrease in compression efficiency due to eccentricity. The input end of the rotating shaft 62 is connected to the power transmission mechanism 5, which efficiently transmits the amplified power of the drive acceleration mechanism 4 to the output end. The rotating impeller 63 is installed at one end of the rotating shaft 62 inside the volute 61. It rotates at high speed with the rotating shaft 62 and applies pressure to the steam entering the volute 61 through the aerodynamic design of the blades, thereby achieving adiabatic compression of the low-temperature secondary steam. The interference fit design between the rotating impeller 63 and the rotating shaft 62 ensures that there is no relative slippage during high-speed rotation, providing direct power execution guarantee for maintaining the high-pressure state of the steam.

[0019] As a technical optimization of this utility model, an inlet channel 64 is provided on the inner side of the volute 61 near the rotating impeller 63, and an outlet channel 65 is provided on the upper end of the volute 61. The inlet channel 64 and the outlet channel 65 of the compressor body 6 are respectively connected to the evaporation system. The inlet channel 64 and the outlet channel 65 are used to draw in low-temperature secondary steam and discharge high-temperature and high-pressure steam after compression.

[0020] In practice, the inlet channel 64 is located at the end of the volute 61 near the rotating impeller 63, allowing low-temperature secondary steam to directly enter the working area of ​​the rotating impeller 63, reducing flow losses. The outlet channel 65 is located at the upper end of the volute 61, cooperating with the streamlined inner cavity of the volute 61 to smoothly discharge the compressed high-temperature and high-pressure steam. The connection between the inlet channel 64 and the outlet channel 65 and the evaporation system realizes a closed loop of low-temperature steam intake, high-pressure compression, and finally high-temperature steam discharge for reuse, fully leveraging the energy-saving advantages of MVR. The sufficient power provided by the drive acceleration mechanism 4 ensures that the steam pressure discharged from the outlet channel 65 is stable and meets the standards, avoiding steam pressure fluctuations due to insufficient power, which would affect the heating effect of the evaporation system.

[0021] As a technical optimization of this utility model, the drive shaft 21, transmission shaft 43 and high-speed shaft 46 are all rotatably assembled inside the speed-increasing gearbox 41 through rolling bearings. The rolling bearings are angular contact ball bearings with axial load capacity. The rolling bearings are used to prevent axial movement during gear transmission.

[0022] In practice, the angular contact ball bearing has both axial and radial load-bearing capacity, which is suitable for the force requirements of the drive shaft 21, transmission shaft 43, and high-speed shaft 46 during high-speed rotation. Since the angular contact ball bearing is assembled inside the speed-increasing gearbox 41, it can effectively limit the axial movement of each shaft, ensure the stable meshing clearance between the large gear 42 and the first transmission gear 44, and between the second transmission gear 45 and the small gear 47, and avoid power loss or tooth surface wear caused by gear meshing misalignment. At the same time, the low friction characteristics of the rolling bearing can reduce transmission resistance, improve the transmission efficiency of the speed-increasing gearbox 41, and further ensure sufficient power for the rotating impeller 63.

[0023] As a technical optimization of this utility model, the rotating impeller 63 is a closed three-dimensional flow impeller, the support base 1 is equipped with a shock-absorbing pad for reducing vibration during equipment operation, and the drive motor 2 is a variable frequency motor.

[0024] In practice, the closed-loop three-dimensional impeller design improves the efficiency and stability of steam compression, making it suitable for high-pressure conditions. The shock-absorbing pads in the support base 1 absorb vibrations during operation, reducing the impact on the overall structure and preventing vibrations from being transmitted to the gear set or rotating impeller 63, thus ensuring transmission accuracy and compression stability. The drive motor 2 uses a variable frequency motor, which can adjust the output speed according to the steam demand of the evaporation system. Combined with the speed-increasing effect of the speed-increasing gearbox 41, it achieves precise matching of power output, avoiding power waste and maintaining high-pressure steam under different loads, further improving the operating efficiency and energy-saving effect of the equipment.

[0025] Working principle: First, the inlet channel 64 and outlet channel 65 of the compressor body 6 are connected to the evaporation system pipeline to ensure reliable sealing. The support base 1 is firmly attached to the mounting surface by the bottom shock-absorbing pad, providing horizontal and stable support for the entire equipment and preventing displacement during operation. After the drive motor 2 is powered on, it is in standby mode. The drive shaft 21 at its output end is precisely connected to the large gear 42 in the speed-increasing gearbox 41 through the speed-increasing gearbox coupling 3. The speed-increasing gearbox coupling 3 compensates for installation deviations and ensures that the power transmission is shock-free. The transmission shaft 43 and high-speed shaft 46 in the speed-increasing gearbox 41 are respectively assembled in the corresponding positions of the speed-increasing gearbox 41 through angular contact ball bearings. The large gear 42, the first transmission gear 44, the second transmission gear 45, and the small gear 47 are in a meshing and ready state. The lubricating oil circulation system is started to provide lubrication and cooling for the transmission components. Then, the drive motor 2 adjusts its output speed according to the requirements of the evaporation system. The torque is transmitted to the speed increaser coupling 3 through the drive shaft 21, which in turn drives the large gear 42 to rotate. The large gear 42 meshes with the first transmission gear 44 on the transmission shaft 43 to achieve the first-level speed increase. The transmission shaft 43 synchronously drives the second transmission gear 45 at the front end to rotate. The second transmission gear 45 meshes with the small gear 47 on the high-speed shaft 46 to complete the second-level speed increase. Finally, the speed of the drive motor 2 is increased by the corresponding multiple. The high-speed shaft 46 outputs power at high speed. The power transmission mechanism 5 transmits the torque of the high-speed shaft 46 to the rotating shaft 62 of the compressor body 6, which drives the rotating impeller 63 in the volute 61 to rotate at high speed, generating negative pressure suction. Finally, the high-temperature and high-pressure steam formed after compression is collected and guided in the flow channel of the volute 61. It first draws in the low-temperature secondary steam generated by the evaporation system through the inlet channel 64. The rotating impeller 63 performs work on the steam through the aerodynamic design of the blades. With the guidance of the streamlined inner cavity of the volute 61, the steam pressure and temperature continue to rise, eventually forming high-temperature and high-pressure steam. It is discharged through the outlet channel 65 and flows back to the evaporation system as a heat source for recycling.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A high-pressure MVR steam compressor, characterized in that, include: A support base (1) and a drive motor (2) fixedly installed at the center of one side of the upper end of the support base (1). The output end of the drive motor (2) is connected to a drive shaft (21). The output end of the drive shaft (21) is connected to a speed increaser coupling (3). The drive shaft (21) is connected to a drive acceleration mechanism (4) through the speed increaser coupling (3). The drive acceleration mechanism (4) includes a speed-increasing gearbox (41). Inside the speed-increasing gearbox (41), a drive shaft (21), a transmission shaft (43), and a high-speed shaft (46) are rotatably mounted in sequence. A large gear (42) is fixedly mounted on the drive shaft (21). A first transmission gear (44) and a second transmission gear (45) are fixedly mounted on the transmission shaft (43). A small gear (47) is fixedly mounted on the high-speed shaft (46). The large gear (42) meshes with the first transmission gear (44), and the second transmission gear (45) meshes with the small gear (47). The drive acceleration mechanism (4) is connected to a power transmission mechanism (5) through the high-speed shaft (46). The power transmission mechanism (5) is connected to a compressor body (6). The drive acceleration mechanism (4) increases the rotational speed through the speed-increasing gearbox (41) and transmits power to the compressor body (6) to maintain the steam in a high-pressure compressed state.

2. A high-pressure MVR steam compressor according to claim 1, characterized in that, The compressor body (6) includes a volute (61) fixed to the upper end of the support base (1) on the side away from the drive motor (2), and a rotating shaft (62) is rotatably installed at the center of the inner side of the volute (61).

3. A high-pressure MVR steam compressor according to claim 2, characterized in that, The input end of the rotating shaft (62) is connected to the power transmission mechanism (5), and the output end of the rotating shaft (62) extends into the volute (61). A rotating impeller (63) is fixedly installed on the outer wall of the rotating shaft (62). The shaft hole of the rotating impeller (63) is interference-fitted with the rotating shaft (62), and the rotating impeller (63) rotates synchronously at high speed with the rotating shaft (62).

4. A high-pressure MVR steam compressor according to claim 3, characterized in that, An inlet channel (64) is provided on the inner side of the volute (61) near the rotating impeller (63), and an outlet channel (65) is provided on the upper end of the volute (61). The inlet channel (64) and outlet channel (65) of the compressor body (6) are respectively connected to the evaporation system. The inlet channel (64) and outlet channel (65) are used to draw in low-temperature secondary steam and discharge high-temperature and high-pressure steam after compression.

5. A high-pressure MVR steam compressor according to claim 1, characterized in that, The drive shaft (21), transmission shaft (43) and high-speed shaft (46) are all rotatably mounted inside the speed-increasing gearbox (41) via rolling bearings. The rolling bearings are angular contact ball bearings with axial load capacity. The rolling bearings are used to prevent axial movement during gear transmission.

6. A high-pressure MVR steam compressor according to claim 3, characterized in that, The rotating impeller (63) is a closed three-dimensional flow impeller, the support base (1) is equipped with a shock-absorbing pad for reducing vibration during equipment operation, and the drive motor (2) is a variable frequency motor.

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