Oil-injected screw compressor installation in which cooling module is offset from compressor element

Abstract

Oil-injected screw compressor installation including a frame or underframe (5 2), a screw compressor element (3), electrical cabinet (6), oil separator vessel (5) and an air-cooled cooling module (8), with as characteristic that on one side (2a) of the frame (2), the screw compressor element (3) is placed horizontally and with the electrical 10 cabinet (6), the oil separator vessel (5) and the aircooled cooling module (8) being placed on the other side (2b) of the frame (2), with the cooling module (8) being placed such that this is perpendicular to the compressor element (3) and the air (9) sucked in by the cooling module 15 (8) will flow between the electrical cabinet (6) and the cooling module (8).

Claims

1. An oil-injected screw compressor installation, comprising: a frame (2), a screw compressor element (3), an oil-cooled motor (15), electrical cabinet (6), oil separator vessel (5) and an air-cooled cooling module (8), and a minimum pressure valve (7) mounted on the air-cooled cooling module (8), wherein: the oil-cooled motor (15) and the screw compressor element (3) are disposed along an axis (X-X′) on a first side (2a) of the frame in a longitudinal direction, the screw compressor element (3) being driven by the oil-cooled motor (15), the electrical cabinet (6) and the air-cooled cooling module and the oil separator vessel (5) are disposed along an axis in a longitudinal direction on a second side (2b) of the frame (2), the second side (2b) being opposite the first side (2a) in a lateral direction transverse to the longitudinal direction, the air-cooled cooling module (8) being located offset from the screw compressor element (3) in the lateral direction and extending from the frame (2), and air (9) flowing between the electrical cabinet (6) and the air-cooled cooling module (8) is sucked in by the air-cooled cooling module (8).

2. The oil-injected screw compressor installation according to claim 1, further comprising a valve manifold (11) in which all oil filters and thermostats are contained.

3. The oil-injected screw compressor installation according to claim 2, wherein the valve manifold (11) is on the first side (2a) of the frame (2).

4. The oil injected screw compressor installation according to claim 1, further comprising an underframe (13) configured to receive a dryer for drying the compressed gas, the underframe being coupled to the frame (2).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) With the intention to better illustrate the characteristics of the invention, some preferential embodiments of oil-injected screw compressor installations according to the invention, are described below, as an example without any limiting character, with reference to the accompanying drawings in which:

(2) FIG. 1 shows schematically and in perspective a known oil-injected screw compressor installation;

(3) FIG. 2 shows schematically and in perspective an oil-injected screw compressor installation;

(4) FIG. 3 schematically shows a view according to the arrow F3 in FIG. 2;

(5) FIG. 4 shows schematically and in perspective, an additional underframe.

DESCRIPTION OF THE INVENTION

(6) The classic, known oil-injected screw compressor installation 1 shown schematically in FIG. 1 has the following set-up:

(7) On one half 2a of the underframe or frame 2, the screw compressor element 3 is placed horizontally together with the motor 4 which is an air-cooled motor 4.

(8) An oil separator vessel 5 and an electrical cabinet 6 are placed on the other half 2b of the frame 2. The minimum pressure valve 7 is placed on the oil separator vessel 5.

(9) There is further an air-cooled cooling module 8 provided which is placed laterally over the compressor element 3.

(10) Due to this, a warm compartment 3a and a cold compartment 3b are created in the casing which is necessary for the air-cooled motor 4 to function well.

(11) Further, filters, valves, thermostats and other control and service components are placed here and there in the oil-injected screw compressor installation 1.

(12) At the same time, a lot of oil pipes and pressure pipes are needed to connect all of the components together.

(13) It is possible that around all components of the oil-injected screw compressor installation 1, a casing is provided which has been omitted in FIG. 1 for the sake of clarity.

(14) In FIGS. 2 and 3, an oil-injected screw compressor installation 1 according to the invention is shown with once again the casing being omitted for the sake of clarity.

(15) The compressor installation 1 includes a frame 2 or underframe on which on one side 2a a screw compressor element 3 is placed horizontally.

(16) According to the invention, this screw compressor element 3 is driven by an oil-cooled motor 15. The oil-cooled motor 15 is mounted against the screw compressor element 3.

(17) Further according to the invention, the oil separator vessel 5 is provided on the other side 2b of the frame 2, together with the electrical cabinet 6 and the air-cooled cooling module 8.

(18) The cooling module 8 is placed such that this is perpendicular to the compressor element 3, in other words: perpendicular to the longitudinal direction X-X′ of the screw compressor element 3.

(19) Further, the air 9 sucked in by the cooling module 8 will flow between the electrical cabinet 6 and the cooling module 8. This is shown schematically with the arrow 9.

(20) It is important to mention here that the cooling module 8 does not extend over the compressor element 3 but is entirely located on the other side 2b of the frame 2.

(21) Because of this, the cooling module 8 will be more easily accessible for maintenance, repair and/or replacement tasks, among others because it is closer to the ground.

(22) Other advantages of such a set-up have already been explained above.

(23) In this case, but not essential for the invention, the cooling module 8 includes one or more fans 10. These fans 10 will be responsible for sucking in the air 9.

(24) Additional, but not essential for the invention, the screw compressor installation 1 is further provided with a valve manifold 11 in which all oil filters and thermostats are contained.

(25) As can be seen in FIG. 3, this valve manifold 11 is in this case on the side 2a of the frame 2 just as the screw compressor element 3 is.

(26) Also additionally, but not essential for the invention, the minimum pressure valve 7 is mounted on the air-cooled cooling module 8. In this case on the inlet 12 of the cooler for compressed gas from the air-cooled cooling module 8.

(27) FIG. 4 shows a separate, additional underframe 13 with which the oil-injected screw compressor installation 1 from FIGS. 2 and 3 can be possibly equipped.

(28) This separate, additional underframe 13 is intended for a dryer with which the compressed gas can be dried and which can be attached to the frame 2 of the oil-injected screw compressor installation 1.

(29) As can be seen in FIG. 4, the separate, additional underframe 13 is provided with attachment elements 14 with which it can be screwed onto the frame 2 of the oil-injected screw compressor. It is clear that the attachment can also be done in different ways.

(30) As is clear from the comparison of FIG. 1 with FIGS. 2 and 3, in an oil-injected screw compressor installation 1 according to the invention there are far fewer oil pipes and pressure pipes needed. This is due to the specific assembly or architecture or set-up of the oil-injected screw compressor installation 1 according to the invention with the special positioning of the air-cooled cooling module 8, the use of the valve manifold 11 and the location of the minimum pressure valve 7.

(31) The present invention is in no way limited to the embodiments described as an example and shown in the figures, but an oil-injected screw compressor installation according to the invention can be realised in all kinds of shapes and sizes without falling outside the scope of the invention.