Multi-stage steam compressor

Abstract

The utility model is suitable for the technical field of steam compressors, and provides a multi-stage steam compressor which comprises a Roots type steam compressor body, a transmission case, a transmission motor, a power input shaft, a power output shaft, a transmission mechanism and an adjusting mechanism, the transmission case is fixed on the Roots type steam compressor body, the transmission motor is fixed on the outer wall of the transmission case, and the power input shaft and the power output shaft are rotationally connected in the transmission case. According to the scheme, the transmission mechanism is arranged, the driving gear arranged in the transmission mechanism drives the driven gear to be in linkage, then the power output shaft is driven to be in linkage with the power input shaft, and meanwhile through the multiple gear sets with different gear ratios, the power output shaft can drive the power output shaft to be in linkage with the power input shaft under the condition that input power of the power input shaft is not changed. And the output power and the speed of the power output shaft are changed, so that the situation that external electric control equipment needs to be used for control is effectively avoided, and meanwhile, the range of adjusting the rotating speed of the impeller in the Roots type steam compressor body is widened.

Description

Technical Field

[0001] The utility model belongs to the technical field of steam compressors, in particular to a multi-stage steam compressor. Background Art

[0002] The overall structure of a steam compressor is relatively complex, mainly consisting of three basic units: a compression system, a steam cooler, and a lubrication system. Common steam compressors include Roots steam compressors. Roots steam compressors are a commonly used centrifugal refrigeration compressor. They are mainly composed of two paired rotors (also called impellers) and a compression chamber. During operation, the size of the compression chamber is continuously changed by the rotation of the rotors, thereby achieving air compression. This type of compressor is commonly used in industrial and commercial refrigeration systems and can effectively improve refrigeration efficiency.

[0003] Although the current steam compressor technology is relatively mature, there are still some problems. For example, the current Roots steam compressor needs to be powered by an electric motor to drive the impeller to rotate during operation. During operation, if the impeller speed needs to be adjusted, it is necessary to use external electronic control equipment to control the output power of the motor. The cost of external electronic control equipment is generally high and easy to damage, which can easily cause unnecessary economic losses. At the same time, due to the limited output power of the motor, the range of impeller speed that can be adjusted is also relatively limited, and it cannot be adjusted over a large range, which has certain limitations. Summary of the Invention

[0004] The utility model provides a multi-stage steam compressor, which aims to solve the problem that the motor in the current steam compressor needs to be controlled by an external electronic control device, which increases the economic burden and the output power of the motor is relatively limited, resulting in a limited range of impeller speed adjustment.

[0005] The utility model is realized as follows: a multi-stage steam compressor comprises: a Roots-type steam compressor body, a transmission box, a transmission motor, a power input shaft, a power output shaft, a transmission mechanism and an adjustment mechanism;

[0006] The transmission box is fixed to the Roots-type steam compressor body, the transmission motor is fixed to the outer wall of the transmission box, the power input shaft and the power output shaft are both rotatably connected to the inside of the transmission box, one end of the power input shaft is coaxially fixed to the output shaft of the transmission motor, and one end of the power output shaft is coaxially connected to the impeller of the Roots-type steam compressor body;

[0007] The transmission mechanism is arranged between the power input shaft and the power output shaft, and the transmission mechanism includes a driving gear, a driven gear, a limiting tooth groove, a docking sleeve and a linkage gear. The driving gear is coaxially fixed on the power input shaft, the driven gear is rotatably connected to the power output shaft, and the driving gear and the driven gear are engaged with each other. The limiting tooth groove is concavely arranged on the side wall of the driven gear, the docking sleeve is slidably sleeved on the power output shaft, the linkage gear is coaxially fixed on the docking sleeve, and the linkage gear and the limiting tooth groove cooperate with each other.

[0008] Preferably, a linkage protrusion is fixed on the outer wall of the power output shaft, a linkage sliding groove is provided on the inner wall of the docking cylinder, and the linkage protrusion is slidably engaged in the linkage sliding groove.

[0009] Preferably, the adjustment mechanism includes a guide rod, a sliding sleeve and a connecting rod. The guide rod is fixed in the internal cavity of the transmission box, the sliding sleeve is slidably mounted on the guide rod, one end of the connecting rod is fixed on the sliding sleeve, and the other end is rotatably connected to the docking sleeve.

[0010] Preferably, the adjustment mechanism also includes a shift rod, an adjustment rotating rod, a chuck and a slot. The shift rod is fixed on the outer wall of the sliding sleeve, the adjustment rotating rod is rotatably connected to the transmission box, the chuck is coaxially fixed on the adjustment rotating rod, the slot is set through the chuck, and the slot is an irregular structure and is symmetrically arranged in two groups. The shift rod is slidably engaged in the slot.

[0011] Preferably, the adjustment mechanism also includes a locking plate and a locking rod, the locking plate is coaxially fixed on the adjustment rotating rod, and a plurality of notches are provided at the edge of the locking plate, a protrusion is fixed on the outer wall of the transmission box, the locking rod is slidably connected in the protrusion, and one end of the locking rod abuts against the notch at the edge of the locking plate.

[0012] Preferably, an abutment plate is fixed on the locking rod, and a return spring is sleeved on the outside of the locking rod, one end of the return spring abuts against the abutment plate, and the other end abuts against the protrusion.

[0013] Preferably, a scale plate is fixed on the outer wall of the transmission box, the adjusting rod passes through the axis of the scale plate, and a handle is fixed on one end of the adjusting rod, and an indicator arrow is provided on the handle.

[0014] Preferably, at least four groups of driving gears and driven gears are provided, and the gear ratios of each group are different.

[0015] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0016] 1. By setting up a transmission mechanism and an adjustment mechanism, the driving gear set in the transmission mechanism drives the driven gear to be linked, and then drives the power output shaft and the power input shaft to be linked. At the same time, through multiple sets of gear sets with different gear ratios, the power output shaft can change the output power and speed of the power output shaft when the input power of the power input shaft remains unchanged. This is simple, efficient and easy to use, effectively avoiding the need for external electronic control equipment, and also increasing the range of the impeller speed adjustment in the Roots-type steam compressor body;

[0017] 2. The rotation of the chuck in the adjustment mechanism is used to link the shift lever in the slot, and through the slot with a special structure, the shift lever drives the sliding sleeve to slide and change the stroke accordingly, so that the linkage gear can dock with the limit tooth groove in the driven gear at different positions, thereby driving the power output shaft to rotate synchronously, thereby realizing rapid adjustment of the power output shaft speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the external integral connection structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the external structure of the transmission box of the utility model;

[0020] Figure 3 This is a schematic diagram of the connection structure of the adjustment mechanism portion of the utility model;

[0021] Figure 4 This is a schematic diagram of the transmission mechanism structure of the utility model;

[0022] Figure 5 This is a schematic diagram of the docking sleeve and its connection structure of the utility model;

[0023] Figure 6 This is a schematic diagram of the connecting rod connection structure of the utility model;

[0024] In the figure: 1. Roots-type steam compressor body; 2. Transmission box; 3. Transmission motor; 4. Power input shaft; 5. Power output shaft; 6. Transmission mechanism; 61. Driving gear; 62. Driven gear; 63. Limiting tooth groove; 64. Docking cylinder; 65. Linkage gear; 66. Linkage protrusion; 67. Linkage slide groove; 7. Adjustment mechanism; 71. Guide rod; 72. Sliding sleeve; 73. Connecting rod; 74. Driving rod; 75. Adjustment rod; 76. Chuck; 77. Slot; 78. Locking disk; 79. Locking rod; 710. Abutment plate; 711. Return spring; 712. Turn handle; 713. Dial. DETAILED DESCRIPTION

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0026] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] The present invention provides a multi-stage steam compressor. Figure 1-6 As shown, it includes: a Roots steam compressor body 1, a transmission box 2, a transmission motor 3, a power input shaft 4, a power output shaft 5, a transmission mechanism 6 and an adjustment mechanism 7;

[0028] The transmission case 2 is fixed to the Roots-type steam compressor body 1, the transmission motor 3 is fixed to the outer wall of the transmission case 2, the power input shaft 4 and the power output shaft 5 are both rotatably connected to the inside of the transmission case 2, one end of the power input shaft 4 is coaxially fixed to the output shaft of the transmission motor 3, and one end of the power output shaft 5 is coaxially connected to the impeller of the Roots-type steam compressor body 1;

[0029] The transmission mechanism 6 is arranged between the power input shaft 4 and the power output shaft 5. The transmission mechanism 6 includes a driving gear 61, a driven gear 62, a limiting tooth groove 63, a docking sleeve 64 and a linkage gear 65. The driving gear 61 is coaxially fixed on the power input shaft 4, and the driven gear 62 is rotatably connected to the power output shaft 5. The driving gear 61 and the driven gear 62 are meshed with each other. The limiting tooth groove 63 is concavely arranged on the side wall of the driven gear 62. The docking sleeve 64 is slidably sleeved on the power output shaft 5. The linkage gear 65 is coaxially fixed on the docking sleeve 64, and the linkage gear 65 and the limiting tooth groove 63 cooperate with each other. There are at least four groups of driving gears 61 and driven gears 62, and the gear ratios between each group are different.

[0030] A linkage protrusion 66 is fixed on the outer wall of the power output shaft 5, and a linkage slot 67 is provided on the inner wall of the docking tube 64, and the linkage protrusion 66 is slidably engaged in the linkage slot 67;

[0031] The adjustment mechanism 7 includes a guide rod 71, a sliding sleeve 72, and a connecting rod 73. The guide rod 71 is fixed in the internal cavity of the transmission case 2. The sliding sleeve 72 is slidably mounted on the guide rod 71. One end of the connecting rod 73 is fixed to the sliding sleeve 72, and the other end is rotatably engaged with the docking sleeve 64.

[0032] The adjusting mechanism 7 also includes a driving rod 74, an adjusting rotating rod 75, a chuck 76 and a slot 77. The driving rod 74 is fixed on the outer wall of the sliding sleeve 72, the adjusting rotating rod 75 is rotatably connected to the transmission box 2, the chuck 76 is coaxially fixed on the adjusting rotating rod 75, and the slot 77 is arranged on the chuck 76. The slot 77 is a special-shaped structure and is symmetrically arranged in two groups. The driving rod 74 is slidably engaged in the slot 77.

[0033] It should be noted that, since the existing Roots-type steam compressor needs to be powered by a motor to drive the impeller to rotate during operation, if the speed of the impeller needs to be adjusted during operation, it is necessary to control the output power of the motor through an external electronic control device. The cost of the external electronic control device is generally high and easy to damage, which can easily cause unnecessary economic losses. At the same time, due to the limited output power of the motor, the range in which the impeller speed can be adjusted is also relatively limited, and it cannot be adjusted over a large range. There are certain limitations. In order to solve this problem, a transmission mechanism 6 and an adjustment mechanism 7 are provided in this scheme. The driving gear 61 provided in the transmission mechanism 6 drives the driven gear 62 to be linked, and then drives the power output shaft 5 to be linked with the power input shaft 4. At the same time, through multiple sets of gear sets with different gear ratios, the power output shaft 5 can change the output power and speed of the power output shaft 5 when the input power of the power input shaft 4 remains unchanged. It is simple, efficient and easy to use, effectively avoiding the need to use external electronic control equipment for control, and also increasing the range of adjustment of the impeller speed in the Roots-type steam compressor body 1.

[0034] The rotation of the chuck 76 in the adjustment mechanism 7 is utilized to link the lever 74 in the slot 77, and through the slot 77 with a special structure, the lever 74 drives the sliding sleeve 72 to slide and change the stroke accordingly, so that the linkage gear 65 can dock with the limiting tooth groove 63 in the driven gear 62 at different positions, thereby driving the power output shaft 5 to rotate synchronously, thereby realizing rapid adjustment of the speed of the power output shaft 5.

[0035] Specifically, in this embodiment, this scheme mainly includes a Roots-type steam compressor body 1, a transmission box 2, a transmission motor 3, a power input shaft 4, a power output shaft 5, a transmission mechanism 6 and an adjustment mechanism 7. When in use, the turning handle 712 is first turned to drive the chuck 76 to rotate. At this time, the shift rod 74 is linked in the slot 77 and synchronously drives the sliding sleeve 72 to slide on the guide rod 71. At this time, the sliding sleeve 72 drives the docking tube 64 as a whole to slide synchronously on the power output shaft 5 through the connecting rod 73, and drives the linkage gear 65 to dock with the limiting tooth groove 63 of one of the driven gears 62. At this time, the transmission motor 3 is started to drive the power input shaft 4 to rotate, and the power input shaft 4 drives the driving gear 61 to rotate synchronously, and makes the driven gear 62 mesh and link. The driven gear 62 drives the linkage gear 65 and the docking tube 64 to rotate synchronously as a whole, and drives the power output shaft 5 to rotate synchronously to output power to the Roots-type steam compressor body 1.

[0036] In a further preferred embodiment of the present invention, Figure 1-6 As shown, the adjustment mechanism 7 also includes a locking plate 78 and a locking rod 79. The locking plate 78 is coaxially fixed on the adjustment rod 75, and a plurality of notches are provided at the edge of the locking plate 78. A protrusion is fixed on the outer wall of the transmission box 2. The locking rod 79 is slidably connected in the protrusion, and one end of the locking rod 79 abuts against the notch at the edge of the locking plate 78.

[0037] In this embodiment, the locking plate 78 is limited by the locking rod 79, thereby achieving the limit locking of the adjustment rod 75, thereby preventing the adjustment rod 75 from rotating due to accidental touch.

[0038] In a further preferred embodiment of the present invention, Figure 1-6 As shown, an abutment plate 710 is fixed to the locking rod 79 , and a return spring 711 is sleeved on the outside of the locking rod 79 , one end of the return spring 711 abuts against the abutment plate 710 , and the other end abuts against the protrusion.

[0039] In this embodiment, one end of the locking rod 79 can be firmly abutted against the notch at the edge of the locking plate 78 by the elastic force of the return spring 711 .

[0040] In a further preferred embodiment of the present invention, Figure 1-6 As shown, a scale plate 713 is fixed to the outer wall of the transmission box 2, an adjusting rod 75 passes through the axis of the scale plate 713, and a turning handle 712 is fixed at one end of the adjusting rod 75, and an indicating arrow is set on the turning handle 712.

[0041] In this embodiment, the dial 713 allows the operator to precisely control the rotation angle of the adjustment rod 75 .

[0042] It should be noted that for the aforementioned embodiments, for simplicity of description, they are all expressed as a series of action combinations. However, those skilled in the art should be aware that the present invention is not limited by the order of the actions described, because according to the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0043] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative, such as the division of the above-mentioned units. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the coupling or communication connection between each other shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunications or other forms.

[0044] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope to be protected by the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making any creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also fall within the scope to be protected by the present invention.

Claims

1. A multi-stage steam compressor, characterized in that: include: Roots-type steam compressor body (1), transmission box (2), transmission motor (3), power input shaft (4), power output shaft (5), transmission mechanism (6) and adjustment mechanism (7); The transmission box (2) is fixed on the Roots-type steam compressor body (1), the transmission motor (3) is fixed on the outer wall of the transmission box (2), the power input shaft (4) and the power output shaft (5) are both rotatably connected to the inside of the transmission box (2), one end of the power input shaft (4) is coaxially fixed to the output shaft of the transmission motor (3), and one end of the power output shaft (5) is coaxially connected to the impeller of the Roots-type steam compressor body (1); The transmission mechanism (6) is arranged between the power input shaft (4) and the power output shaft (5), and the transmission mechanism (6) includes a driving gear (61), a driven gear (62), a limiting tooth groove (63), a docking sleeve (64) and a linkage gear (65). The driving gear (61) is coaxially fixed on the power input shaft (4), the driven gear (62) is rotatably connected to the power output shaft (5), and the driving gear (61) and the driven gear (62) are meshed with each other. The limiting tooth groove (63) is concavely arranged on the side wall of the driven gear (62), the docking sleeve (64) is slidably sleeved on the power output shaft (5), the linkage gear (65) is coaxially fixed on the docking sleeve (64), and the linkage gear (65) and the limiting tooth groove (63) cooperate with each other.

2. A multi-stage steam compressor according to claim 1, characterized in that: A linkage protrusion (66) is fixed on the outer wall of the power output shaft (5), a linkage sliding groove (67) is provided on the inner wall of the docking cylinder (64), and the linkage protrusion (66) is slidably engaged in the linkage sliding groove (67).

3. A multi-stage steam compressor according to claim 1, characterized in that: The adjustment mechanism (7) comprises a guide rod (71), a sliding sleeve (72) and a connecting rod (73); the guide rod (71) is fixed in the internal cavity of the transmission box (2); the sliding sleeve (72) is slidably sleeved on the guide rod (71); one end of the connecting rod (73) is fixed on the sliding sleeve (72), and the other end is rotatably engaged with the docking sleeve (64).

4. A multi-stage steam compressor according to claim 3, characterized in that: The adjusting mechanism (7) further comprises a shifting rod (74), an adjusting rotating rod (75), a chuck (76) and a card slot (77), wherein the shifting rod (74) is fixed on the outer wall of the sliding sleeve (72), the adjusting rotating rod (75) is rotatably connected to the transmission box (2), the chuck (76) is coaxially fixed on the adjusting rotating rod (75), the card slot (77) is provided on the chuck (76) through-through, and the card slot (77) is of a special-shaped structure and symmetrically provided in two groups, and the shifting rod (74) is slidably engaged in the card slot (77).

5. A multi-stage steam compressor according to claim 4, characterized in that: The adjustment mechanism (7) further comprises a locking plate (78) and a locking rod (79), wherein the locking plate (78) is coaxially fixed to the adjustment rotating rod (75) and a plurality of notches are provided at the edge of the locking plate (78), a protrusion is fixed on the outer wall of the transmission box (2), the locking rod (79) is slidably connected in the protrusion, and one end of the locking rod (79) abuts against the notch at the edge of the locking plate (78).

6. A multi-stage steam compressor according to claim 5, characterized in that: An abutment plate (710) is fixed to the locking rod (79), and a return spring (711) is sleeved on the outside of the locking rod (79), one end of the return spring (711) abuts against the abutment plate (710), and the other end abuts against the protrusion.

7. A multi-stage steam compressor according to claim 4, characterized in that: A scale plate (713) is fixed to the outer wall of the transmission box (2), the adjusting rod (75) passes through the axis of the scale plate (713), and a turning handle (712) is fixed to one end of the adjusting rod (75), and an indicating arrow is provided on the turning handle (712).

8. A multi-stage steam compressor according to claim 1, characterized in that: At least four groups of driving gears (61) and driven gears (62) are provided, and the gear ratios between each group are different.

Images