JP2019532223A - Assembly for commercial vehicle screw compressors - Google Patents

Abstract

An assembly for a commercial vehicle screw compressor (10) comprising at least one casing component of the screw compressor (10) and a baffle plate (100), the casing component comprising at least three baffles. A plate receiving recess (104), at least one baffle plate receiving recess (104) being disposed outside an imaginary line connecting the other baffle plate receiving recesses (104); (100) has at least three fingers (102), and these fingers are in the respective baffle plate receiving recesses (104) arranged corresponding to each finger (102) in the assembled state of the assembly. Is plugged into.

Description

  The present invention relates to an assembly for a commercial vehicle screw compressor having at least one casing component of the screw compressor and a baffle plate.

  Screw compressors for commercial vehicles are already known from the prior art. Such a type of screw compressor is used, for example, to prepare the compressed air necessary for the braking system of commercial vehicles.

  In this connection, in particular, compressors filled with oil, in particular screw compressors, are also known, in which oil temperature control is a problem. The oil temperature is usually controlled by providing a compressor filled with oil and an external oil cooler connected to the oil circulation path via a temperature regulating valve. In this case, the oil cooler is a heat exchanger having two circulation paths separated from each other, and includes a first circulation path for high-temperature fluid, that is, compressor oil, and a second circulation path for cooling fluid. Is provided. As the cooling fluid, for example, air, mixed water containing an antifreezing agent, or other oil can be used.

  The oil cooler must then be connected to the compressor oil circuit via a line or hose, and the oil circuit must be protected against leakage.

  Furthermore, since this external volume must be filled with oil, the total amount of oil is also increased. This increases the system inertia. Furthermore, the oil cooler must be mechanically housed and mounted by means of a surrounding holding body or a separate holding body, which requires additional mounting means and thus a construction space. To do.

  US Pat. No. 4780061 (US 4,780,061) already discloses a screw compressor with an integrated oil cooling section.

  Furthermore, DE 37 17 493 A1 discloses a screw compressor device which is arranged in a compact casing, which screw compressor device of the screw compressor. It has an oil cooler located on the electric motor.

  A screw compressor of the type mentioned at the beginning is already known, for example, from DE 102 2004 060 417 (DE 10 2004 060 417 B4).

  In order to be able to control the oil movement in the screw compressor itself even during the running operation of commercial vehicles, on the one hand, the oil in the screw compressor itself can be delivered throughout for lubrication purposes, however, It is desirable to control the movement of the oil pan.

  An object of the present invention is to improve the assembly for a commercial vehicle screw compressor of the type mentioned at the outset, in particular to simplify and improve the assembly of the screw compressor as a whole.

  This object is achieved according to the invention by an assembly for a commercial vehicle screw compressor with the features of claim 1. According to this, it is an assembly for a screw compressor of a commercial vehicle, which has at least one casing component of the screw compressor and a baffle plate, and the baffle plate is inserted and clamped in the assembled state. An assembly for a commercial vehicle screw compressor is provided which is held in the component.

  The idea underlying the present invention is that the baffle plate is easily and reliably attached to the casing component of the screw compressor. This is done in particular by holding the baffle plate clamped in the casing. A simple insertion of the baffle plate into the casing component is sufficient to enable a secure attachment.

  Further, the casing component has at least three baffle plate accommodation recesses, and at least one baffle plate accommodation recess is disposed outside an imaginary line connecting the other two baffle plate accommodation recesses, It is conceivable that the baffle plate has at least three fingers, and these fingers are inserted into respective one baffle plate receiving recesses corresponding to the respective fingers in the assembled state. Based on the situation that the baffle plate receiving recesses are not aligned and are not aligned in a straight line, this arrangement applies a bending force to the baffle plate during insertion. Clamped and held. Accordingly, the baffle plate is clamped and held in the casing component, and can be reliably held here after insertion into the baffle plate receiving recess, based on the bending force applied by shaping and arranging the baffle plate receiving recess. This reliably prevents omissions. Simple manufacturing is possible by mounting with the baffle plate receiving recesses and correspondingly corresponding fingers on the baffle plate. By inserting the baffle plate into the baffle plate receiving recess, the assembling can be performed relatively easily. Mechanical equipment and assembly are also possible and possible.

  Furthermore, the casing component may be a rotor casing of a screw compressor. In this connection in particular, it is conceivable that the baffle plate is arranged below the rotor (with respect to the assembled state).

  However, basically, it is also conceivable that the casing component is the casing cover of a screw compressor. By inserting the baffle plate into a first casing component of the casing, for example a casing cover, the attachment can be carried out in only one casing component. Since the baffle plate is already securely held in this way, it is no longer necessary to install it in another casing component of the screw compressor casing. This situation is of course the same for the arrangement of the baffle plate in the rotor casing and the attachment of the baffle plate.

  Furthermore, it is conceivable that the middle one of the three baffle plate accommodation recesses is disposed outside the imaginary line connecting the other two baffle plate accommodation recesses. This creates a bending force in the middle region, which is useful for clamping the baffle plate in the baffle plate receiving recess or in the casing component of the screw compressor, thus achieving the clamping relatively easily. can do. The bending force required for the assembly that can be applied for this is furthermore applied relatively easily, since the baffle plate has to be bent in the middle and then can be mounted relatively easily.

  The baffle plate fingers may be substantially aligned in the unmounted and unassembled states. In particular, the baffle plate may be a relatively simple flat, unbent or flat plate in an unbent state. With such an arrangement, it is possible to manufacture at a low cost, and a simple application of the bending force necessary for mounting the baffle plate to the casing component is also achieved. In particular, the baffle plate is bent in the mounted state and the assembled state by mounting the fingers in the corresponding baffle plate receiving recesses, and the baffle plate is clamped and stressed and held in the casing component. It is possible that Clamped and stressed hold ensures that the baffle plate is locked by simply mounting the three fingers of the baffle plate within the corresponding baffle plate receiving recesses of the casing component. Is done. Based on the situation where the bending supports the clamped and stressed holding, this ensures a reliable holding.

  All the fingers of the baffle plate may be located on one edge of the baffle plate. This allows simple manufacturing. Thus, only one movement is sufficient for mounting the baffle plate on the casing component, and no additional adjustment or mounting on another casing component is necessary.

  Further details and advantages of the invention are explained in greater detail with reference to the illustrated embodiments.

1 is a schematic sectional view of a screw compressor according to the present invention. It is a perspective view which shows the rotor casing of the screw compressor of FIG. It is a perspective view of the baffle plate shown in FIG. FIG. 3 is a diagram showing in detail a baffle plate housing recess provided in the rotor casing according to the embodiment of FIG. 2.

  FIG. 1 shows a schematic cross-sectional view of a screw compressor 10 according to an embodiment of the present invention.

  The screw compressor 10 has a mounting flange 12 for mechanically attaching the screw compressor 10 to an electric motor not shown here.

  However, the input shaft 14 is shown, through which torque is transmitted from the electric motor to one of the screws 16 and 18, i.e. to the screw 16.

  The screw 18 is engaged with the screw 16 and is driven by the screw 16.

  The screw compressor 10 has a casing 20 in which main components of the screw compressor 10 are accommodated.

  The casing 20 is filled with oil 22.

  An inlet pipe piece 24 is provided on the air inlet side of the casing 20 of the screw compressor 10. In this case, the inlet pipe piece 24 is formed such that the air filter 26 is disposed on the inlet pipe piece. Further, the air inlet pipe piece 24 is provided with an air inlet 28 in the radial direction.

  In the region between the inlet pipe piece 24 and the location where the inlet pipe piece 24 is attached to the casing 20 is provided a valve insert 30 to which a spring load is applied, in this case configured as an axial seal. Has been.

  Such a valve insert 30 functions as a check valve.

  An air supply passage 32 that supplies air to both the screws 16 and 18 is provided downstream of the valve insert 30.

  An air outlet pipe 34 having a rising pipe 36 is provided on the outlet side of both the screws 16 and 18.

  A temperature sensor 38 is provided in the region of the end portion of the ascending pipeline 36, and the oil temperature can be monitored by this temperature sensor.

  Furthermore, a holder 40 for the air / oil separation element 42 is provided in the air outlet area.

  The holder 40 for the air / oil separation element has an air / oil separation element 42 in the region on the bottom side in the assembled state (as shown in FIG. 1).

  Furthermore, a corresponding filter screen or a known filtration and oil separation device 44 is provided inside the air / oil separation element 42, but this is not specifically described.

  The holder 40 for the air / oil separation element has an air outlet opening 46 in the central upper region with respect to the assembled state and ready for operation (ie the state as shown in FIG. 1). Leads to a check valve 48 and a minimum pressure valve 50. Check valve 48 and minimum pressure valve 50 may be formed as one common valve combined.

  Following the check valve 48, an air outlet 51 is provided.

  The air outlet 51 is usually connected to a correspondingly known compressed air consumer.

  In order to guide the separated oil 22 present in the air / oil separating element 42 back into the casing 20 again, a rising line 52 is provided, which is connected to the air / oil separating element 42. Starting from the holder 40 for this purpose, it has a filtration and check valve 54 where it moves into the casing 20.

  A nozzle 56 is provided in the casing hole downstream of the filtration and check valve 54. The oil return guide pipe 58 is returned to the region substantially in the middle of the screw 16 or the screw 18 and supplies the oil 22 to the screw again.

  An oil discharge screw 59 is provided in the bottom area of the casing 20 in the assembled state. A corresponding oil discharge opening is opened through the oil discharge screw 59, and the oil 22 can be discharged through this opening.

  An attachment portion 60 to which the oil filter 62 is attached is also provided in the lower region of the casing 20. The oil 22 is first guided to the temperature adjustment valve 66 through the oil filter inlet passage 64 disposed in the casing 20.

  Instead of the temperature regulating valve 66, an open loop control device and / or a closed loop control device can be provided that can monitor the oil temperature of the oil 22 in the casing 20 and adjust it to a target value. .

  Next, downstream of the temperature control valve 66 is an oil inlet of the oil filter 62, which returns the oil 22 to the screw 18 or the screw 16 again via a central return guide line 68. The guide is guided back to the bearing 70 of the shaft 14 which is oil-lubricated. A nozzle 72 is also provided in the area of the bearing 70, and this nozzle is provided in the casing 20 in communication with the return guide pipe 68.

  The cooler 74 is connected to the attachment portion 60.

  In the upper region of the casing 20 (with respect to the assembled state), a safety valve 76 capable of reducing the pressure in the casing 20 that is too high is located.

  A bypass line 78 leading to the pressure release valve 80 is located before the lowest pressure valve 50. Air can be guided back to the area of the air inlet 28 via the pressure relief valve 80 controlled by connection to the air supply passage 32. This region may be provided with an air vent valve and a nozzle (reduced diameter portion of the supply pipe line) not shown.

  Furthermore, an oil level sensor 82 can be provided on the outer wall of the casing 20 substantially at the height of the conduit 34. The oil level sensor 82 may be, for example, an optical sensor, and the sensor signal indicates whether the oil level is above the oil level sensor 82 during operation or the oil level sensor 82 is exposed, thereby It is constructed and adjusted so that it can detect whether the surface is correspondingly degraded.

  In the context of such monitoring, an alarm unit may be provided that issues or communicates a corresponding error notification or warning to the system user.

The function of the screw compressor 10 shown in FIG. 1 is as follows:
Air is supplied via the air inlet 28 and reaches the screws 16 and 18 via the check valve 30 where the air is compressed. The air-oil mixture compressed 5 to 16 times exits the screws 16 and 18, passes through the outlet pipe 34, rises through the rising pipe 36, and is directly blown onto the temperature sensor 38.

  The air still partially containing oil particles is then guided through the holder 40 to the air / oil separation element 42 and reaches the air outlet line 51 when a corresponding minimum pressure is reached.

  The oil 22 present in the casing 20 is maintained at the operating temperature via the oil filter 62 and possibly via the heat exchanger 74.

  If cooling is not required, the heat exchanger 74 is not used and is not turned on.

  The corresponding switch-on is effected via a temperature regulating valve 66. After purification in the oil filter 62, the oil is supplied to the screw 18 or the screw 16 through the pipe 68, but is also supplied to the bearing 70. The oil 16 is supplied to the screw 16 or the screw 18 via the return guide lines 52 and 58, and in this case, the purification of the oil 22 is performed in the air / oil separation element 42.

  The torque of the electric motor (not shown) is transmitted to the screw 16 via the shaft 14, and this screw 16 is engaged with the screw 18, and the screws 16 and 18 of the screw compressor 10 are driven via this electric motor. .

  In detail, based on the pressure release valve 80 not shown in detail, the high pressure formed on the outlet side of the screws 16, 18 in the operation ready state is not confined in the region of the supply line 32, particularly when the compressor is started. In the region of the supply line 32, it is always ensured that a low inlet pressure is present, in particular atmospheric pressure. Otherwise, when the compressor is started, a very high pressure that excessively loads the drive motor may be generated on the outlet side of the screws 16 and 18.

  FIG. 2 shows in perspective view an assembly for a commercial vehicle screw compressor 10 comprising at least one casing component, in this case a rotor casing 20a, and a baffle plate 100. FIG.

  In this case, the baffle plate 100 is inserted into the rotor casing 20a.

  Basically, it is also conceivable to use the casing cover of the screw compressor 10 instead of the rotor casing 20a. When the baffle plate 100 is mounted and assembled as shown in FIG. 2, the baffle plate 100 is bent by being mounted on the rotor casing 20a so that the baffle plate 100 is clamped and held under stress in the rotor casing 20a. become.

  For this purpose, as shown in FIGS. 3 and 4, on the one hand, the baffle plate 100 has fingers 102 arranged on one side, that is, three fingers 102.

  On the other hand, the rotor casing 20 a has three baffle plate accommodating recesses 104.

  In this case, in the baffle plate accommodating recess 104, the two outer baffle plate accommodating recesses 104 form one straight line, and the third baffle plate accommodating recess 104 is arranged so as to be shifted with respect to these. Therefore, the three baffle plate accommodating recesses 104 are not aligned.

  In other words, the middle one of the three baffle plate housing recesses 104 is disposed outside the imaginary line connecting the other two baffle plate housing recesses 104.

  The baffle plate 100 is attached to the baffle plate housing recess 104 with fingers 102.

  Such clamping is sufficient to securely attach the baffle plate 100 to the rotor casing 20a.

  By shifting the middle baffle plate housing recess 104, the baffle plate 100 is curved on the one hand due to its rigidity, but is also securely held. This is because the bending force to be continuously applied and the arrangement of the fingers 102 are maintained while the baffle plate 100 is clamped in the baffle plate accommodating recess 104 of the rotor casing 20a by the fingers in the rotor casing 20a and is subjected to stress. Because it helps.

DESCRIPTION OF SYMBOLS 10 Screw compressor 12 Mounting flange 14 Input shaft 16 Screw 18 Screw 20 Casing 20a Rotor casing 22 Oil 24 Inlet pipe piece 26 Air filter 28 Air inlet 30 Valve insert 32 Air supply path 34 Air outlet pipe 36 Rising pipe 38 Temperature sensor 40 Air / Oil separation element 42 Air / oil separation element 44 Filter screen or known filtration or oil separation device 46 Air outlet opening 48 Check valve 50 Minimum pressure valve 51 Air outlet 52 Ascending line 54 Filtration and check valve 56 Nozzle 58 Oil return guide line 59 Oil discharge screw 60 Attached part 62 Oil filter 64 Oil filter inlet passage 66 Temperature control valve 68 Return guide line 70 Bearing 72 Nozzle 76 Safety 78 release the bypass line 80 valve 82 oil level sensor 100 baffle plate 102 fingers 104 baffle plate housing recess

Claims (8)

  An assembly for a commercial vehicle screw compressor (10) comprising at least one casing component of the screw compressor (10) and a baffle plate (100), the baffle plate (100) being Assembly for a commercial vehicle screw compressor (10) which is inserted and clamped in the assembled state and held in the casing component.   The casing component has at least three baffle plate receiving recesses (104), and at least one of the baffle plate receiving recesses (104) connects the other two baffle plate receiving recesses (104). The baffle plate (100) has at least three fingers (102), and the fingers are arranged corresponding to the fingers (102) in the assembled state of the assembly. The assembly according to claim 1, wherein each assembly is inserted into one baffle plate receiving recess.   The assembly according to claim 1 or 2, wherein the casing component is a rotor casing (20a) of the screw compressor (10).   The assembly according to claim 1 or 2, wherein the casing component is a casing cover of the screw compressor (10).   The middle one of the three baffle plate accommodating recesses (104) is disposed outside the imaginary line connecting the other two baffle plate accommodating recesses (104). The assembly according to claim 1.   The assembly according to any one of the preceding claims, wherein the fingers (102) of the baffle plate (100) are substantially aligned in a non-mounted state and a non-assembled state.   In the mounted state and the assembled state, the baffle plate (100) is bent by mounting the fingers (102) into the corresponding baffle plate receiving recesses (104), and the baffle plate (100) is bent into the casing. 7. An assembly according to claim 1, wherein the assembly is clamped and held under stress.   The assembly according to any one of the preceding claims, wherein all the fingers (102) of the baffle plate (100) are arranged on one edge of the baffle plate (100).

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