Compressor with transmission

Abstract

The invention relates to the technical field of compressors, in particular to a compressor with a transmission, which comprises a hollow compressor shell and a transmission arranged in the compressor shell, the input end is connected with a power shaft on the motor side of the compressor and rotates synchronously, the output end is connected with a crankshaft on the pump body side of the compressor and rotates synchronously, the input end and the output end are in variable-speed transmission connection through a transmission mechanism, and part of a compressor shell serves as a shell of the transmission to be assembled with the transmission mechanism. The integrated design that the compressor shell and the transmission shell are combined into one is achieved, the transmission shell is omitted, connecting parts do not need to be added, the whole machine assembling steps of the compressor with the transmission can be reduced, the material cost and the time cost are reduced, and extra cost increase caused by the fact that the transmission is additionally arranged in the compressor is reduced; and the assembly coaxiality among the transmission, the motor and the pump body is facilitated, the overall axial length of the compressor can be reduced, and the overall axial stability of the compressor is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a compressor with a transmission. Background Art

[0002] At present, it is considered to add a transmission between the power shaft on the motor side of the compressor and the crankshaft on the pump body side, and realize asynchronous operation of the motor and the pump body through the speed transmission of the transmission, so as to achieve the purpose of improving the overall efficiency of the compressor.

[0003] Adding a transmission inside the compressor, as a newly added independent complete device, usually requires adding connecting parts to connect and fix the transmission inside the compressor to achieve the installation and fixation of the transmission inside the compressor. However, this installation method will lead to additional parts in the compressor, thereby increasing material costs, increasing the number of steps for assembling the compressor, and increasing time costs. At the same time, adding a transmission will also increase the overall axial length of the compressor, making it easy for the transmission to have coaxiality problems with the motor and pump body, thereby affecting the stable operation of the compressor. Summary of the invention

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a compressor with a transmission, which can reduce the components connected to and fixed to the transmission in the compressor and ensure the overall axial stability of the compressor.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention provides a compressor with a transmission, comprising a compressor housing with a hollow interior and a transmission disposed inside the compressor housing, wherein the transmission has an input end connected to and synchronously rotating with a power shaft on a compressor motor side and an output end connected to and synchronously rotating with a crankshaft on a compressor pump body side, wherein the input end and the output end are connected via a transmission mechanism for speed change transmission, and a part of the compressor housing is used as an outer shell of the transmission and is assembled with the transmission mechanism.

[0007] Preferably, the transmission mechanism includes a sun gear, a planetary gear, a ring gear and a planetary carrier, one end of the sun gear is the input end of the transmission, and the other end is meshed with one side of the planetary gear, the other side of the planetary gear is meshed with the ring gear, the ring gear is fixed on the inner surface of the compressor housing, one end of the planetary carrier is connected to the planetary gear, and the other end is the output end of the transmission.

[0008] Preferably, the ring gear and the compressor housing are connected by interference fit.

[0009] Preferably, the ring gear and the compressor housing are an integral part designed integrally.

[0010] Preferably, the input end of the transmission is supported by a first bearing, and the inner ring and the outer ring of the first bearing are respectively fixed on the outer peripheral surface of the input end and the inner surface of the compressor housing.

[0011] Preferably, the inner ring of the first bearing and the outer peripheral surface of the input end are connected by interference fit, and / or the outer ring of the first bearing and the inner surface of the compressor housing are connected by interference fit.

[0012] Preferably, the output end of the transmission is supported by a second bearing, and the inner ring and the outer ring of the second bearing are respectively fixed on the outer peripheral surface of the output end and the inner surface of the compressor housing.

[0013] Preferably, the inner ring of the second bearing and the outer peripheral surface of the output end are connected by interference fit, and / or the outer ring of the second bearing and the inner surface of the compressor housing are connected by interference fit.

[0014] Preferably, the input end and the output end are connected via a transmission mechanism for speed reduction transmission.

[0015] Preferably, the transmission is an open structure inside the compressor housing and is lubricated with lubricating oil.

[0016] Compared with the prior art, the present invention has significant improvements:

[0017] The compressor with a transmission of the present invention realizes an integrated design of the compressor housing and the outer shell of the transmission by directly assembling the transmission mechanism of the transmission on the compressor housing, forming a compressor built-in open transmission, thereby eliminating the outer shell of the transmission, and no longer needing to add additional connecting components for connecting and fixing the transmission, thereby reducing the components inside the compressor with the transmission, and reducing the assembly steps of the compressor with the transmission, reducing the material cost and time cost; at the same time, the transmission mechanism of the transmission is directly assembled on the compressor housing, reducing the transmission assembly parts, and only retaining the transmission input end, output end and transmission mechanism core components, and completely integrating the transmission with the compressor, greatly reducing the additional cost increase caused by adding a transmission in the compressor. In addition, the transmission mechanism of the transmission is directly assembled on the compressor housing, which is beneficial to the assembly coaxiality between the transmission and the motor and the pump body, and can improve the stability of the transmission installed and fixed in the compressor housing, thereby avoiding the coaxiality deviation between the transmission, the motor and the pump body when the compressor is running, and reducing the overall axial length of the compressor without adding connecting components, thereby effectively preventing the compressor from having coaxiality problems in the axial direction, ensuring the overall axial stability of the compressor, and improving the stability of the compressor operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of a compressor with a transmission according to an embodiment of the present invention.

[0019] The reference numerals are described as follows:

[0020] 1 Compressor housing

[0021] 2 Transmission

[0022] 2a Input

[0023] 2b Output

[0024] 21 Sun gear

[0025] 22 Planetary gear

[0026] 23 Ring gear

[0027] 24 Planetary bracket

[0028] 25 First bearing

[0029] 26 Second bearing

[0030] 3 Motor

[0031] 31 Stator

[0032] 32 Rotor

[0033] 4 Power shaft

[0034] 5 Pump body

[0035] 6 Crankshaft DETAILED DESCRIPTION

[0036] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, but not to limit the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Furthermore, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0040] like Figure 1 FIG. 1 is an embodiment of a compressor with a transmission provided by the present invention. The compressor with a transmission in this embodiment includes a compressor housing 1 and a transmission 2 .

[0041] The interior of the compressor housing 1 is hollow and is used to accommodate the motor 3, power shaft 4, pump body 5 and crankshaft 6 of the compressor. The motor 3 includes a stator 31 fixedly connected to the compressor housing 1 and a rotor 32 arranged inside the stator 31. The power shaft 4 is passed through the rotor 32 and is fixedly connected to the rotor 32, so as to rotate synchronously with the rotor 32. The crankshaft 6 is passed through the pump body 5, and the pump body 5 is the compression structure of the compressor. The eccentric part of the crankshaft 6 drives the piston to perform eccentric operation inside the pump body 5 to compress the working medium entering the pump body 5.

[0042] The transmission 2 is placed inside the compressor housing 1, and the transmission 2 has an input end 2a and an output end 2b. The input end 2a of the transmission 2 is connected to the power shaft 4 on the compressor motor 3 side and rotates synchronously, and is used to receive the rotational torque from the power shaft 4. The output end 2b of the transmission 2 is connected to the crankshaft 6 on the compressor pump body 5 side and rotates synchronously, and is used to output torque to the crankshaft 6 to drive the crankshaft 6 to operate. The input end 2a and the output end 2b of the transmission 2 are connected by a transmission mechanism speed change transmission, that is, the output speed of the output end 2b is different from the input speed of the input end 2a, so that the crankshaft 6 on the pump body 5 side and the power shaft 4 on the motor 3 side run asynchronously at different speeds. Preferably, the input end 2a and the output end 2b are connected via a reduction transmission mechanism, that is, the output speed of the output end 2b is less than the input speed of the input end 2a, so that the speed of the crankshaft 6 on the pump body 5 side is less than the speed of the power shaft 4 on the motor 3 side, thereby realizing asynchronous operation of the motor 3 and the pump body 5, and utilizing the characteristics of high efficiency of the motor 3 at high speed and high efficiency of the pump body 5 at low speed, so that the motor 3 and the pump body 5 can both operate in their respective high efficiency ranges, thereby effectively improving the overall efficiency of the compressor.

[0043] In this embodiment, part of the compressor housing 1 is used as the outer shell of the transmission 2 and assembled with the transmission 2 transmission mechanism, so as to realize the installation and fixation of the transmission 2 inside the compressor housing 1. By directly assembling the transmission mechanism of the transmission 2 on the compressor housing 1, an integrated design of the compressor housing 1 and the outer shell of the transmission 2 is realized, forming a compressor built-in open transmission 2, thereby eliminating the outer shell of the transmission 2, and no additional connecting components are required to connect and fix the transmission 2, thereby reducing the components inside the compressor with a transmission, and reducing the assembly steps of the compressor with a transmission, reducing material costs and time costs; at the same time, the transmission mechanism of the transmission 2 is directly assembled on the compressor housing 1, reducing the assembly parts of the transmission 2, and only retaining the input end 2a, output end 2b and core components of the transmission mechanism of the transmission 2, and completely integrating the transmission 2 with the compressor, greatly reducing the additional cost increase caused by adding the transmission 2 in the compressor. Furthermore, directly assembling the transmission mechanism of the transmission 2 on the compressor housing 1 is beneficial to the assembly coaxiality between the transmission 2, the motor 3 and the pump body 5, and can improve the stability of the installation and fixation of the transmission 2 in the compressor housing 1, thereby avoiding the coaxiality deviation between the transmission 2, the motor 3 and the pump body 5 when the compressor is running. The overall axial length of the compressor can be reduced without adding connecting parts, thereby effectively preventing the compressor from having coaxiality problems in the axial direction, ensuring the overall axial stability of the compressor, and improving the stability of the compressor operation.

[0044] In this embodiment, preferably, the transmission mechanism of the transmission 2 includes a sun gear 21, a planetary gear 22, a ring gear 23 and a planetary support 24. One end of the sun gear 21 is the input end 2a of the transmission 2, which is used to connect the power shaft 4 on the motor 3 side. The input end 2a of the transmission 2 is fixedly connected to the power shaft 4 or is an integral part designed as an integral unit, so that the input end 2a of the transmission 2 and the power shaft 4 keep rotating synchronously. The other end of the sun gear 21 is meshed with one side of the planetary gear 22, and the other side of the planetary gear 22 is meshed with the ring gear 23, and the ring gear 23 is fixed on the inner surface of the compressor housing 1. One end of the planetary support 24 is connected and fixed to the planetary gear 22, so that the planetary support 24 and the planetary gear 22 keep rotating synchronously. The other end of the planetary support 24 is the output end 2b of the transmission 2, which is used to connect the crankshaft 6 on the pump body 5 side. The output end 2b of the transmission 2 is fixedly connected to the crankshaft 6 or is an integral part designed as an integral unit, so that the output end 2b of the transmission 2 and the crankshaft 6 keep rotating synchronously. When the rotor 32 of the motor 3 drives the power shaft 4 to rotate, the sun gear 21 rotates accordingly, and drives the planetary gears 22, the planetary carrier 24 and the crankshaft 6 to rotate. The sun gear 21 and the planetary gears 22 have gear teeth of different sizes, which can realize variable speed transmission, so that the crankshaft 6 and the power shaft 4 run asynchronously at different speeds. By fixing the ring gear 23 to the inner surface of the compressor housing 1, the transmission mechanism of the transmission 2 is directly assembled and fixed on the compressor housing 1, that is, part of the compressor housing 1 is used as the outer shell of the transmission 2 and assembled with the transmission mechanism of the transmission 2.

[0045] In a preferred embodiment, the gear ring 23 of the transmission 2 is connected to the compressor housing 1 by interference fit. Preferably, the gear ring 23 of the transmission 2 can be pressed into the compressor housing 1 in an interference fit manner to fit with the planetary gear 22 of the transmission 2. In this way, the transmission mechanism of the transmission 2 can be assembled and fixed on the compressor housing 1 very conveniently.

[0046] In another preferred embodiment, the gear ring 23 of the transmission 2 is an integral part of the compressor housing 1. Preferably, the gear ring 23 of the transmission 2 can be processed at a position suitable for installing the transmission 2 in the compressor housing 1 to realize that the gear ring 23 of the transmission 2 is an integral part of the compressor housing 1. This can be more conducive to the stability of the assembly and fixation of the transmission mechanism of the transmission 2 on the compressor housing 1.

[0047] In this embodiment, preferably, the input end 2a of the transmission 2 is supported by the first bearing 25. The inner ring of the first bearing 25 is fixed on the outer peripheral surface of the input end 2a of the transmission 2, specifically, fixed on the outer peripheral surface of the end of the sun gear 21 away from the planetary gear support 24. The outer ring of the first bearing 25 is fixed on the inner surface of the compressor housing 1. In this way, the function of the first bearing 25 rolling support the input end 2a of the transmission 2 on the compressor housing 1 is realized, and the assembly connection between the transmission 2 and the compressor housing 1 is also strengthened. The inner ring of the first bearing 25 and the outer peripheral surface of the input end 2a can preferably be connected by an interference fit. The outer ring of the first bearing 25 and the inner surface of the compressor housing 1 can preferably be connected by an interference fit. The first bearing 25 preferably adopts a rolling bearing.

[0048] In this embodiment, preferably, the output end 2b of the transmission 2 is supported by the second bearing 26. The inner ring of the second bearing 26 is fixed on the outer peripheral surface of the output end 2b of the transmission 2, specifically, fixed on the outer peripheral surface of the end of the planetary support 24 away from the sun gear 21. The outer ring of the second bearing 26 is fixed on the inner surface of the compressor housing 1. In this way, the function of the second bearing 26 rolling support the output end 2b of the transmission 2 on the compressor housing 1 is realized, and the assembly connection between the transmission 2 and the compressor housing 1 is also strengthened. The inner ring of the second bearing 26 and the outer peripheral surface of the output end 2b can preferably be connected by an interference fit. The outer ring of the second bearing 26 and the inner surface of the compressor housing 1 can preferably be connected by an interference fit. The second bearing 26 preferably adopts a rolling bearing.

[0049] In this embodiment, the transmission 2 has an open structure inside the compressor housing 1, that is, the compressor housing 1 serving as the outer shell of the transmission 2 does not form a seal with the input end 2a, the output end 2b and the transmission mechanism of the transmission 2, and the input end 2a, the output end 2b and the transmission mechanism of the transmission 2 are all exposed in the internal space of the compressor housing 1. Preferably, the transmission 2 having an open structure inside the compressor housing 1 is lubricated with lubricating oil, and the input end 2a, the output end 2b and the gears and bearing components of the transmission 2 are lubricated with lubricating oil, which can obtain better lubrication effect and lubrication control, and can also conveniently use the lubricating oil circuit inside the compressor to achieve lubrication of the transmission 2 with lubricating oil.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A compressor with a transmission, characterized in that: The invention comprises a compressor housing (1) with a hollow interior and a transmission (2) disposed inside the compressor housing (1); the transmission (2) comprises an input end (2a) connected to and rotating synchronously with a power shaft (4) on the compressor motor (3) side and an output end (2b) connected to and rotating synchronously with a crankshaft (6) on the compressor pump body (5) side; the input end (2a) and the output end (2b) are connected to each other via a transmission mechanism for speed change transmission; a part of the compressor housing (1) is used as a housing of the transmission (2) and is assembled with the transmission mechanism.

2. The compressor with a transmission according to claim 1, characterized in that: The transmission mechanism comprises a sun gear (21), a planetary gear (22), a ring gear (23) and a planetary carrier (24); one end of the sun gear (21) is the input end (2a) of the transmission (2), and the other end is meshed with one side of the planetary gear (22); the other side of the planetary gear (22) is meshed with the ring gear (23); the ring gear (23) is fixed on the inner surface of the compressor housing (1); one end of the planetary carrier (24) is connected to the planetary gear (22), and the other end is the output end (2b) of the transmission (2).

3. The compressor with a transmission according to claim 2, characterized in that: The gear ring (23) and the compressor housing (1) are connected by interference fit.

4. The compressor with a transmission according to claim 2, characterized in that: The gear ring (23) and the compressor housing (1) are an integral part designed in one piece.

5. The compressor with a transmission according to claim 1 or 2, characterized in that: The input end (2a) of the transmission (2) is supported by a first bearing (25), and the inner ring and outer ring of the first bearing (25) are respectively fixed on the outer peripheral surface of the input end (2a) and the inner surface of the compressor housing (1).

6. The compressor with a transmission according to claim 5, characterized in that: The inner ring of the first bearing (25) and the outer peripheral surface of the input end (2a) are connected by an interference fit, and / or the outer ring of the first bearing (25) and the inner surface of the compressor housing (1) are connected by an interference fit.

7. The compressor with a transmission according to claim 1 or 2, characterized in that: The output end (2b) of the transmission (2) is supported by a second bearing (26), and the inner ring and outer ring of the second bearing (26) are respectively fixed on the outer peripheral surface of the output end (2b) and the inner surface of the compressor housing (1).

8. The compressor with a transmission according to claim 7, characterized in that: The inner ring of the second bearing (26) and the outer peripheral surface of the output end (2b) are connected by an interference fit, and / or the outer ring of the second bearing (26) and the inner surface of the compressor housing (1) are connected by an interference fit.

9. The compressor with a transmission according to claim 1, characterized in that: The input end (2a) and the output end (2b) are connected via a transmission mechanism for speed reduction transmission.

10. The compressor with a transmission according to claim 1, characterized in that: The transmission (2) is in an open structure inside the compressor housing (1) and is lubricated with lubricating oil.

Images